7. Behavioral Genetics II
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- เผยแพร่เมื่อ 28 เม.ย. 2024
- (April 14, 2010) Robert Sapolsky continues his series addressing the link between behavior and genetics. He covers the complex endeavor of gene isolation and variability and heritability and wrongly eliminated environmental influences in heritability tests -- finding that genes and environment are infinitely interconnected and co-dependent on each other.
Stanford University
www.stanford.edu
Stanford Department of Biology
biology.stanford.edu/
Stanford University Channel on TH-cam
/ stanford
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"We'll come back to the amygdala, don't panic."
subtle pun
Yes, what we need is not TLC but a bit of CBT
what does this have to do with the Amygadala?
i have the CD-r with my MRI.
i have mtDNA A3243G and my doctor knows it.
ahhhh sooo fucking good. I wonder if he’s been saving that.
Just to vent, this camera person is blowing my mind on how they decide to not show the visuals on the board that Sapolsky's directly talking about. They're problably not even listening, just thinking 'gotta keep his head in the middle, gotta keep his head in the middle, gotta keep his head in the middle, gotta keep his head in the middle.'
Kevin Lopez Yeah, I'm guessing the camera men are just bored, following the head by intuition because it's easy. They're probably thinking about something completely different.
Could be a tracking program.
is it filmed statically wide angle then edited digitally maybe
Exactly! I'm here for the cute puppies, man...
I can see myself doing this XD
this guy is giving me an excuse to blame my parents all over again
Sad and true
I actually feel the opposite: since there is no free will, and only environment and biology - could they do differently really?...
no free will = they couldn't do any different. also if you blame your parents for your failures you also have to credit them for your successes
@Maria Callous wtf?
you didn't actually listen did you?
I recommend this class to EVERYYBODY. I studied psychology for years and this really bridges the gaps. The teacher is super educated, I wish I could chat with him. Thumbs UP!!!
Im a psychologist who is doing his PhD in evolutionary psychology, the cousin of behavioural biology. this stuff makes so much more sense than most of the psych i studied at undergrad!
Robert Sapolsky is a leader in the field of Neuroscience!
I’m a mechanical engineer and mainly a Vipassana meditator, and I study this to better understand how life works and that there is no “I”, which helps coming out of all suffering.
Yes he is a master and a wizard. No doubt about it. I found that he is leaturing in Segestgrom Hall in Costa Mesa on February 17, 2020. I was able to get the tickets.
When I lived in the Bay Area I used to go to his lectures every now and then, and he's great! He does say not to bother taking notes because he talks too fast.
"By controlling for the environment, you have removed your ability to see the role of environment "
That's such a great point.
Can we all appreciate this guy's intelligent humor
Yes.
Yes.
Yes.
Yes.
yes
"When you look at things like juggling your DNA just when you are making new neurons, what you see over and over is what human genes are about most dramatically is coding for ways in which you have freedom from the effects of genetics"
Totally blew my mind. When you end a lecture on that note its hard not to immediately move to the next one. So thankful to Stanford for bringing this up.
yes this is the moment that did it for me, wow!
I think you need 24-48 hours between lectures just to process all the information and implications.
Incredible ability to lecture without reference to notes. Astonishing memory along with knowledge.
If you look carefully he does spread notes across the desk top and sometimes even glances at them. But he has been teaching all his life. In one of his interviews he says that when doing post grad work in an institution which didn't let him teach he got a part-time job at another college so that he could teach.
Well said❤️
I’m sure he gives the same lecture 3x a week.
he's been teachhing for decades, you too would memorize the stuff with that amount of repetition
I'm going to invent an app that identifies when I stop paying attention and pauses the youtube video.
have a pupil dilation detectors embedded in your app, using the front cam.
As soon as the pupils are relaxed pause the video and play some scary sounds that should bring back the focus.
It would be quite useful for meditation
It's been nearly a year, have you done it?
@@dalep.2508 There's been some delays. I might have to outsource it to @kaushal shukla and @Jernej Kavka. Check back next year.
I'd like better integration with Bluetooth devices (button mapping to the same thing across the desktop and mobile version, skipping adds ect.)...not your project but where else would I whine?
This is absolutely amazing. This entire lecture series is a total gift for those of us who don't have the means to attend a Stanford class. Sapolsky is brilliant and this material will tie in nicely to the courses I'm taking in community college. Thank you for making this public!
So, not too sure how I landed here, and I don't have anything important to say, but in my perusal of the comments, you mentioned your taking community college classes, and then I noticed this was 2 years ago and figured you'd be done by now with you classes and wanted to know how that worked out for you? Did you finish? are you still in class and pursuing the same thing?
@@peterepete3571 @Pete Repete Hi! Well, funny way to end up in a comments section. But yes, I did finish with a 4.0 and went on to a university in Colorado. There I score two different internships - one with NOAA doing GIS work, the other with the Ecology and Evolutionary Biology department, AND (because I had the chance to create an independent project) I joined forces with NOAA again, but this time their Space Weather Prediction Center. :) I'm considered a senior now but I'm going to double major and stretch it out an extra year. I was hired on as an intern yesterday for the EPA in the Spring. :) I did ok. Sapolsky's lectures are still one of my favorite things. What I'm looking at now, in terms of graduate programs is studying how space weather and heliobiology affect the evolution of life on earth in different mediums. I hope to be one day on the edge of astrobiology.
@Jon Doh! Hey there
@@peterepete3571 Same here. I was watching a beekeeping video, when this series was suggested by You Tube. It has been 45 years since I last read about genetics, this was before I took another professional path and I thought, ah, well, lets see how this knowledge has developed. Now I am hooked. It is like meeting your high school sweetheart at retirement age.
This science is amazing. The professor is even more.
Get his book behavior, it's awesome.
This exemplifies the true spirit of education. Thank you Stanford for saving us from having to watch television and allow our brains to melt away.
This one kid has been coughing for the past four lectures! I hope they get better =(
Seven years ago it was allowed to cough during lectures. Not anymore.
@@MarisMunkevics 👍 be a
@@MarisMunkevics 👍🙏👍🙏 your email address 🙏
How do you know it's the same kid?
For real, shit's gettin on my nerves
I think this dude breathes through his ears. Never pauses. I took 6 semesters of biology, chemistry, pathophysiology and medicinal chemistry each and 2 semesters of physics in college and honestly don't think I'd know how to takes notes in these lectures.
Voice recorder/rendering his board models in shorthand.
He tells you at the beginning not to bother taking notes because he talks too fast. but he does hand out notes to the lectures -- or at least he handed them out long ago when I used to go to his lectures: now if you're in his class you get them online.
@@kimcooper87 ohhh that’s nice. One of my favorite teacher in high school was doing the same, really helpful, wish more teachers would do that
I watch at 2x speed lol
Same! I have 6 semesters of college chemistry, one year of A&P, one semester of college physics, and 2 semesters of psychology in my undergrad. Granted, 2 of the chemistry courses were related to food chemistry, but still, ochem and biochem were prerequisites for each. This lecture would have blown me away to try and take notes in.
I hope all these students got to rewatch these lectures in the early ‘00. Their tuition certainly deserved it! It’s amazing and overwhelming all at once.
Excuse me while I replay this….
Russkie Metro Dogs
behavioral vs molecular genetics review,
prenatal environment
Lamarckian evolution
Modern methods: 80s, find diff in phenotypes
Genetic Marker method, find a family w disease hemophelia, etc
Bioethical considerations
Sequencing genomes
17:00 Microarrays, Bioinformatics
TL, macromutation
Basil Crescent hormone, mice v monogamous v polygamous
Genes for autism, social propensity
BDNF brain-derived neurotrophic factor trains amygala to be anxious or fearful
Dopamine, pleasure anticipation, novelty craving
NP
31:00 Chance: Brownian motion, mitochondria
40:00 Heritability
1:09:00 25 yr study, Duke U, heritability of aggression, anti-social (formerly sociopathic) vs abuse by cold distant moms
1:22:00 Math & verbal performance vs gender vs nation / environment
+Arthur Sulit thanks alot for taking notes!
This comment needs to be higher. Good work 👍
Has anybody actually managed to find the printed notes which Prof. Sapolsky had distributed back then?
Nice
nice :)
They should investigate plant IQ in the environment of my home, as they all tend to die.
And please don't come and say the common factor is me. They die even if I'm away for a month.
+Mattias Sollerman
Humour++
i know it is a joke, but i wonder how hot is the climate where you live.
Mattias Sollerman, lol
If you can't rule out your effect on the first hour of their existence, then you can't prove that the plants who had longer living parents lived 19x longer when you were gone because of genetics. They might have lived longer because of mitochondria. Or because all of the ones with longer living parents were placed in "ear" shot of beethovens 9th Symphony on a loop. Or because a certain, particularly high water content bug preferred to die in their pot.
wait..... they are supposed to last longer than a month? i thought it was because i was just buying the cheap ones
Sapolsky putting every piece of information right where it has to be, and so fluently and undertstandable. My brain tickles after watching a video of him
"number of fingers is massively affected by genes but has 0% heritability, and tendency to wear earrings has 100% heritability despite being entirely cultural" These examples perfectly capture the difference between "trait x has high heritability" and "trait x is genetic"
@Phi6er nope I think you missed the point
@Phi6er The real problem is that we don't read the scientific papers, we read the media version "translated" by a scientifically illiterate journalist.
@Phi6er I agree that scientists can often be quite bad at considering how the terminology they use will be interpreted by laymen, but to suggest that they are purposely misleading the public for attention is silly.
@Phi6er So we have narrowed it down to pop scientists at least. Anyway, there's a difference between misleading and simplifying.
@Phi6er Wait so is the underlying science real or is it all a big scam?
Robert Sopolsky is one of thee most talented pro's I have ever encounted I cannot thank him enough. It takes alot to catch and keep my attention and he did it hands down..........SQUIRREL
Loving this series. Behavioral Genetics I & II were pretty difficult to get through though. I think the big take away from them is genetics vs environment is complicated, so don't get too excited about correlation graphs.
Nature is the major systematic force that makes us who we are. Nurture is essentially irrelevant for accounting for individual differences. I’m starting the second lecture now, hopefully it’s better than the first. I love Sapolsky, but his presentation of behavioral genetics and trans-generational epigenetics was appalling. He made it appear that DNA differences aren’t that powerful while epigenetics is the most compelling part of the story. Heritability accounts for the majority of differences between people, and the environmental effects are almost always confounded by genetic influence. Nurture is irrelevant, and the non-shared environment has not been tractable as a systematic factor. Read “Blueprint” by Plomin and “Innate” by Kevin Mitchell if you want the most accurate and up-to-date analyses of behavioral genetics.
@@armoda1057 The way I see it is that genes determine potentials and environment determines how those potentials manifest.
‘Nature or nurture?’ “isn’t wrong simply because the answer is nearly always “both,” or because the categories themselves are flawed, but also because once you understand that there is one common evolutionary goal, getting precise about mechanism is less important than understanding why a trait came to be... ...The false nature versus nurture dichotomy is disruptive, as it interferes with a more nuanced understanding of what we are and the evolutionary forces that have brought us here.” -Bret & Heather Weinstein, "A Hunter Gatherer's Guide to the 21st Century"
@@armoda1057 Sounds like Plomin has been widely discredited, and by way of arguments that in their essence are contained in this very lecture. Perhaps instead of being appalled, give this one another listen.
@@armoda1057 I think you've missed the point of this lecture. The are plenty of lectures here on TH-cam by Plomin which present a far more balanced view than what you have presented.
These classes are so amazing! Thank you for sharing all this knowledge Standford University and Mr. Sapolsky, the studies mentioned about the importance of the environment related to gender performance are very revealing!
If I were taking this class back in the day, I would’ve needed this lecture recorded. It is SO rich in content, I’d want to listen to it multiple times.
Thank you Robert Sapolsky. I will never be able to look at genetics in the same way ever again. You completely changed my views on the matter and for that I salute you.
I like how theres a continuous trashing of things he just taught. Watching 7 of these in 3 days probably is a little skewed though, as the actual trashing happened over years or decades. But it really speaks to how little we actually know, even as I am aware of his approach I keep coming to conclusions in my head like "well, this explains X" and not 5 minutes later hes like - let me just wipe the board clean. again.
Really appreciate the uploads! Thank you! Man, this Internet thing is cool.
Hahahahaha i can relate
yeah like how he cited autism being more common in males and simon baron cohens extreme male brain theory about autism but those arent thought to be true anymore and its only been 10 years since these lectures
I like turtles
He is the Bob Ross of biology
This lecture started a little bit "slowly" but towards the end there were some really interesting and important points!
where ever the beard goes, is where the camera goes
If every professor were like Robert Sapolsky I’d be taking college courses for fun
Blessings on you, Prof Dr Sapolsky. Your work is a welcome antidote to output of behavioural genetics.
His Humor is so well-timed and intelligent that sometimes people pass up a chance to laugh because the important information is just around the corner - what a genius way of captivating the audience !
These lectures are so eye opening and mindblowing its beautiful. Love Professor S
Why am I paying so much for tuition fees when this stuff is free?! Mind blown in every lecture!
Because the government guarantees the loans that the bank gives, thereby increasing the supply of funds available for degrees, which increases the amount universities can charge for a degree, which increases the number of people who have degrees, flooding the market with degrees, which decreases the scarcity and therfore value of every degree, which causes employers to set a degree as the minimum requirement of employment as a minimum test even where the degree contained nothing of direct benefit to the company.
Internet watchers don't get to see the cute puppy/fox pictures, we also dont get the reading list or other materials, or access to the prof.
// , Don't you want your expensive obedience training certificate?
Because all you get here are the lectures. It then becomes entirely up to you to figure out what books to read, what homework to assign yourself (including papers), how to evaluate the work you actually did, and how to persuade anyone that you have actually learned something. You also don't get to ask the prof questions.
TANSTAAFL.
Companies that hire you, care more about your resources to pay for an education and your patience resources, and obedience resources than your TH-cam selection. Cold hard Truth.
A twice graduate, UCSC and Kaplan Online University.
After some physics, and behavioral science, you get to intuit that Brownian motion is not random per se, but stochastic - a result of complex interdependence (Gleick's book can help you intuit, which I why, I think, that Sapolsky put it in required reading).
The intuition can be followed up by studying complex statistics ( it now requires complex algorithms - computer programs, instead of the more basic stats we get undergrad). I guess this is why any team working on biological behavior has to include a total number-crunching computer programmer or three.
Einstein's stuff on Brownian shows that there is a tendency to remain within some limits - this, too, is important to remember in genetic and biological science:
that limits occur, including the one which Sapolsky has only just touched - optimality vs. the complex constraints he is going through. The use of "infinite" does not mean what many think it means.
Categorical thinking, warned against at the beginning, is a cognitive heuristic; generalization can lead to missing variation.
Just to illustrate both overgeneralization, and use a generalization heuristic better, Moscow dogs which he mentioned are several different groups. One, the wolflike furry-tail, is the one most avoidant (NOT in subways) of humans. There are social dogs who read individual (relevant) human characteristics, more and less territorial ones, subway socialites, subway travelers just using it as do pipples.
By the way, wolves vary in the adaptive traits these dogs show - I study wolves, with some focus on individual differences; none of the differences mentioned in material about these dogs are foreign to wolves, although they are generally avoidant of humans (humans are death to all wild, self-willed animals. One recent wolf in Germany, just watching, evaluating, learning, a basic wolf trait, was, of course, shot by official fiat due to humans' idea that anything having teeth not running away from them is dangerous. Overactive amygdalae in your species...).
Wolves use BDNF too, but their lifespan is only 4k-5k days, 130 to maybe 190 moons, at best, in the real world. This means their evaluation skills are more quickly developed, and must be more accurate - wolves have no time for psychopaths, Machiavellians, the large capacity humans indulge in for complex deception and betrayal. They can recognize these things, when presented by humans - at least the ones who survive it.
Please recall that NOTHING is actually random. Not even random number generators.
🤭🤫
Come talk to people in MN and WI. They have wild, irrational fears of wolves. It’s heartbreaking 💔
I love reading comments complaining about free content on TH-cam.
Jeffrey Soto Why does it matter that it's free?
Jeffrey Soto I directly pay TH-cam $15.99 a month to have no ads. Those who do directly pay are still a customer paying by watching ads, by being a consumer of said ads. I also pay some TH-cam names I personally enjoy more than normal by I.E. Patreon and the like. So I end up pay about $46.00 a month for “free content”.
@@craftycriminalistwithms.z3053 Well, whose fault is that? It's not Sapolsky's fault that you pay for free content...
I’m just here for the free comments.
US tuition makes people think of money when they receive education beyond what's reasonable (buying his books would be reasonable unless it's mandated).
this is my most absolute favourite teacher
I know why you show up here... it's for us. thanks, Sapolsky.
Great series of lectures. I wish the readings were included in description of lectures.
I had a cramp in my stomach after this lecture. You just trashed anything and everything I did know and used for my thinking process.
Thanks for doing that ;)
Perhaps it’s that predefined way of thinking and our willingness or reluctance to revamp it that makes all the difference in our lives. Or it’s impact is hardly measurable.
I feel so lucky to be attending lessons all over again :D And with this amazing amazing professor :D The only challenge is, where do I start? What do I watch next? lol ...
here is the playlist th-cam.com/video/NNnIGh9g6fA/w-d-xo.html
Hi Stanford. I have just finished my masters degree in psychology and am currently unemployed. I will gladly record and edit lectures for you for free as I have a lot of free time on my hands. Please say yes. I know the internet is hungry for these kind of videos in better quality. With a non-clicking camera-man.
You Can Record ME Dribbling A Basketball And Shooting A Basketball If You Don't Get The Stanford Job.
The transportation cost is not on me.
Jurij Fedorov I Said If You Don't Get The Stanford Job You Could Always Videotape ME Dribbling A Basketball And Shooting A Basketball. I Can Pay For Your Trip To A Basketball Court Near ME Where You Could Meet ME And Film ME Dribbling And Shooting A Basketball. Or I Could Just Meet You At Stanford And Have You Film ME There.
Haha... if you can pay for my ticket from Denmark, then I will film you dribling a ball around.
I don't think they read the comments on these videos.
This is the lecture I seem to understand the most! The others just went over my head 🤯
I don't know why youtube recommended me this , but i will never regret it . I want to become a doctor and this will help me a lot .
Professor Sapulsky. I found you when I left TH-cam unattended. The topics you discussed literally woke me up from sleep. Thank you!
Short summary:
Genes are the default settings of humans. Since we are very adaptive to our environment (cf. epigenetics), we get far away from our default settings very rapidly. Therefore, genes do not define much of the variability between us but for people evolving in very similar contexts.
In this lecture, he proceeds to give various example of the interactions between genes, environment and their respective effects on human behavior
these lessons are extraordinary and confirm other studies on human behavior ... fantastic and great Sapolsky Teacher
Please get a better camera person next time. Specifically: 1. Point camera at the diagram the lecturer is pointing at. 2. Point camera at the audience when lecturer asks them to raise hands. 3. Point camera at picture that lecturer puts up (think Arctic Fox from previous lecture). Otherwise, really enjoying this lecture series.
It could be automated to follow Dr. Sapolsky.... idk just possible.
+Manuel Galvan I doubt in 2010, then had the algorithm figured out on controlling solenoids to follow a person, this badly. it's definitely a person controlled camera. random zooming or paning. They just follow object(spaced out). the topic is beautiful, the lecture is amazing, the camera guy, he has some learning to do. maybe that's why he is there, he is learning his camera abilities? peace and love
Mark Ovich I took biochemistry in 2010 in Sweden. The lectures where really early in the morning and the class was huge. Prof used a webcam with face tracking to film the lectures so those who liked mornngs showed up at the lecture and the ones who would rather study evenings watched the videos that got uploaded 3 hours later. Like I said, the camerawork was automated and it looked exactly like this. Weird pannng, slow actual reaction with proff walking out of the screen etc etc. This might very likely be automated.
As for the students, it's a matter of privacy which needs consent. I know that because at the beginning of anothe class, the professor asked the student to give consent in a legally binding form. Sapolsky had given his consent, his students had not.
I was delighted that years ago I had seen, and remembered a BBC program about the Arctic Foxes
The last ten minutes are great!
i am a physician who has treated addiction for the last fifteen years of my career. I have argued against the importance of heritability whenever given the chance, for this unfortunate outcome for so many people and which only appears to be getting worse, both as the 50% number has been used as an inevitability factor because its “genetic” and even worse to make addiction a “disease” like diabetes or hypertension that again gives the unfortunate little choice in the matter. It is no exaggeration when I tell you I have been the lone voice a the American Board of Addiction Medicine conferences and at meetings of the Arizona Society of Addiction Medicine. In conclusion I can tell you there is no such thing as addiction medicine outside of how can healthcare make a buck. Thank you for these two lectures on behavioral genetics.
I love how unbiased this guy is, he's making all these arguments for the influences of environment while constantly acknowledging the effects of genes.
He's a rare gem in the "pick as side" cultural era. 💎
anyone else taking a 5 min break whenever he tells, in real time? :'D
No
No
no
LMAO these trolls in the comments. Of course we do take a break when our professor says so..
Yes, sometimes till the next evening :-D
wow this is mind blowing. I just wish, that earlier in life, I could have come across a teacher like this. Imagine everyone being educated by people as enthused as this. But I guess that is a big point in what he is saying.
I can't stress enough how much I like this guy classes XD and I don't even know what i'm doing here I'm just have a bachelor's degree in translation studies and I'm from Venezuela XDXD
He blows my mind every single time
love his sense of humor and focus mind
After reading a few comments about the bad camerawork and still being unconvinced, I finally see what you people are talking about. A third of the information is missing!
The extent to which he builds rock solid purely-genetic arguments just to utterly destroy them to pieces is remarkable
This is so cool. So packed with awesome information. This stuff is a bit more difficult than previous sections, but the payoff is great. Go Dr Sapolsky. Go Stanford.
One small criticism of the camraperson, at about 1:03 the professor's head is being tracked well, but we can't see the information he introduces he introduces on the board. There was a similar problem on an earlier lecture mentioning tame and untame foxes, when the image above the board was not visible. It would be handy in many cases to be able to zoom out or radically change the view to see context, audience reaction, things like that. I realize this isn't a tv production though.
1:24:31 A woman studying in a physics PhD program in Turkey here. It is so sad to see my country listed as one of the worst. I would like to think the situation is improved since then. But still. :(
The moment he mentioned vasopressin being social I was waiting for the autism comment.
I was not disappointed.
This was an amazing class
You start the video. And, from the very first instant, what strikes you is the irresistible flow of verbal energy coming from our Incredibly Learned Professor. It's as if his brain is under pressure from all the ideas packed in there, all jostling for expression, and opening his mouth acts at once as a welcome vent for the pressure to explode and dilate in the free air. The term that comes to mind is the ancient Greek word PNEUMA, the blast of breath that projects the inspired soul of a prophet. Of course the prophet here is spreading the message of science, of demonstrable knowledge.
Notice also the inseparable physical energy, how the professor’s compulsive rhetorical outpour is supported by an incessant back and forth pacing, with emphasis projected through sweeping arm gestures. It is the same source of energy that globally activates the legs, the arms, the voice and the brain, driving the words out and fuelling the body’s obsessive motion. The total effect has a certain theatrical power, and keeps the students awake and hanging to every word from the start to the end. A distant modern echo of Aristotle's style of giving his lessons ceaselessly walking through the gardens of his Lyceum in Athens, surrounded and followed by his mesmerized students.
Do you have an English Literature background? Your words sound good. Are you an artist?
"Is there a gene for picking at grubs or is there a gene for if you are really tall and you peck at grubs and people don't make fun of you" - I need this one bad
The scarr-rowe effect is relevant to what Mr Sapolsky talks about starting around 1:05:50. The scarr rowe effect shows that heritability rises or lowers depending on the level of socioeconomic status; the argument is that people in poorer environments dont reach their genetic maximum due to environment stunting their growth thus lowering their IQ.
Antihereditarians claim that because POC suffer from lower socioeconomic status this prevents them from reaching their maximum potential IQ but the issue is that in recent research we find the heritability of POC twin studies for IQ are similar to the ones used for whites (half or more) meaning that the between group gaps are indeed mostly genetic and that it's a predisposed lower IQ that causes lower socioeconomic status not versa.
ARound. 1:15 to end genetic & environmental factors in 1) depression 2) in aggression followed thereafter by genetic ie Y chromosome & environmental factors in 1) math ability in 2)verbal ability.
This one is really really good
The kid filming does a very diligent job following the speaker, but never zoomed out to show the figures the speaker is drawing. For Christ sake, look to the right!
He’s very entertaining, and keep her attention.
Minor point: Brownian motion is where the molecules in a gas or liquid run into each other randomly like a stadium full of bumper cars. Brown observed this by looking pollen grains in water and seeing that these grains were moving randomly (because they were being hit by random water molecules).
This being said, all you really need to take away from it is "movement in cells is random".
This is the best lecture!
·nature/nurture has left the chat·
I think this was his best lecture
2:30 i think that one reason that selecting for behavioral traits also carries along traits relating to coat colors and hair curliness is that the brain and the skin both start out as part of the embryonic ectoderm.
That's sexist.
I stan Sapolsky and I've been trying to make my students watch these lectures🙂
Love how theres somone clicking in their pen like a crazy person the entire video. Cant even fall asleep to the video.
Mothers are generally teaching young boys certain skills (protection / providing) and girls another set (beauty / nurturing) she gives boys toys that promote spacial awareness and mathematics. Girls are given dolls and taught to care.
Having read about this stuff off and on after having discovered Steven Jay Gould essays 40 years ago - this is perfect,
he seems like such an amazing teacher
This is not that far out into the future any more. I am hopeful. People will even want to have this done to themselves, because being loving feels sooo much better.
Every human should watch this
🤔💓😜 thank you! Love love learning about the function of the amygdala. I'm giving a biology presentation about fear of climant change and aspects of human behavior.
If most of Stanford teachers are of his and Susskind's level, then this is the best school in the world! I went to UCLA and I had a few exceptional teachers, including Dr. David Sanchez who was beyond exceptional (DEAD POET'S SOCIETY-level teacher in Differential Equations, of all things!), but I have seen a lot of very good Stanford teachers in these TH-cam videos. Great!
great course, I would prefer it even more if the camera was fixed in a large view so we could see the stimuli he shows.
This guy's puns are fresh and make you assimilate things more clearly, am pretty sure it's a requirement for being a Stanford teacher. I mean, 1:05:31 "The Swiss cheese index of the brain" you gotta have an advanced degree to come up with that kind of stuff.
When he says" we will come back to that point in greater detail later" ,Am I right the translation of that is " we will never touch that subject again."??
I loved his story about meeting Barbra McClintoc
Does anybody knows could we find a list of literature used for this course somewhere?
It's interesting what he says about heritability being equal to variability. In the merriam webster dictionary it says:
_"the proportion of observed variation in a particular trait (as intelligence) that can be attributed to inherited genetic factors in contrast to environmental ones"_
Before he emphasized his view, I understood this definition the other way around. Maybe another word should be used, because of its counter-intuitiveness.
Heritability - the lower the number the less it's explained by variation in gene (alleles) and the more it's explained by other factors such as environment.
Where can i access the referenced extended notes
(at about 7:00)
for the lecture?
I don't think Brownian motion is actually "completely random".
Anyway, I think it is enough to know that the stuff in a cell is always in motion within the cell, and when the cell splits the stuff other than the DNA goes to different cells depending on where they are in the parent cell at the time. What goes where is statistically reliable.
this series really exposes the American myth that anyone can achieve the American Dream. thank you
That’s not a scientifically accurate statement
@@4philipp the American myth is a dream, you have to be asleep to believe in it.
it's a two part lecture.
so it seems that if he says that, then it would require you to listen to both parts.
hope that helps.
"Amigdala has a lot to do with fear and anxiety and that sort of thing and we will come back to it. Don't panic."
😂
Summary :
1. Selective dog breeding shows rapid physical changes
In a Russian study, selective breeding of dogs has led to major physical changes resembling puppies in merely 30 generations. This highlights how the interplay between genetics and environment can influence traits and drive evolution quickly.
2. Genetic analysis techniques and challenges
Genetic analysis involves observing traits to find genetic differences and understanding variations in phenotype and behavior. Techniques such as RFLP's, microarrays, and QTLs are employed, but challenges include potential incorrect results and ethical dilemmas of testing for incurable diseases.
3. Genes affecting behavior and emotions
Genes such as dopamine, vasopressin, and BDNF affect risk-taking behavior, social affiliation, anxiety, and fear. Studying genetic variations in these genes sheds light on the connection between genetics and behavior and how mutations can be linked to conditions like autism.
4. Role of chance in genetics and behavior
Chance plays a significant role in gene-environment interactions and genetic diversity. This includes mitochondrial DNA sequences, cell division variability, and unpredictable gene interactions during neural stem cell division. Behavior genetics aims to quantify traits using various techniques to better understand this role of chance.
5. Understanding heritability and variability in traits
Heritability is a measure of how much genes contribute to variability in traits. It's determined by examining genetic markers and copy length variants, and ranges from 0% to 100%. Often, environmental factors play a larger role in variability than genetic differences.
6. Gene-environment interaction in heritability
Environment is crucial when analyzing the impact of gene versions on factors like plant IQ. The environment-gene relationship affects the trait, and it's impossible to fully understand a gene's function without considering its interaction with the environment, which can lead to lower heritability.
7. Genes and environment in determining human behavior
Genetic variance in depression is highly dependent on an individual's childhood exposure to glucocorticoids. Heritability studies measure trait variability, not averages, and are influenced by the removal of environmental variability. The gene-environment relationship in human behavior is inseparable, making it a crucial breakthrough in biological psychiatry.
8. Gender differences in math and verbal performance across countries
Gender differences in math performance are affected by societal factors, not inherent sex differences. Greater gender inequality leads to larger math score differences, while more gender-equal societies have smaller or non-existent differences, with females even excelling in verbal performance.
9. Nature and nurture interplay in genes and behavior
The presence of a gene for a specific trait might not necessarily have a direct effect, but could result from indirect genetic effects. Human genes code for ways to have freedom from the effects of genetics, showing the importance of environment in shaping behavior.
For summarized notes of all the lectures, check here : www.wisdominanutshell.academy/tag/human-behavioral-biology-robert-sapolsky/
Memories^^또 불러도 좋을듯 아니 계속 우리가 느낄수 있는것같아 내 플레이리스트에 저장해놨야겠구먼
The complex conjugate "cavity" of "i", as crystalline-modulation bubble-context structure in a quantum field hierarchical-strata, would restrict variability in the tendency for random bonding in the cells, as it does for all phys-chem wave integration of time.
Includes a well explained concept of the distinction between occurrence in infinite complexity, and specificity of evolutionary selection, that's a recognition of the range (by modulation-frequencies) of multiple choice solutions to environmental adaptations.
Eg AI is a mechanically restricted methodology that's rare in universal occurrence, and must eventually rely on the same processes of information integration as biology to develop. The books, "The Black Cloud", and "A for Andromeda", by Fred Hoyle is well worth reading.
I think one of the things that blew my mind the most....
"Data are plural." 0.o
for most of us, it's a collective noun, like water or rice.
Stanford University
Lecture 7. Behavioural Genetics II
Robert Sapolsky
1:03:46 min ... "PKU" ... 1:04:51 min ... "labels on ... food" ... "phenylalanine free diet" ... 1:05:38 min ... "environmental intervention" ... "reduced heritability"
1:09:37 min ...
1:11:12 min ... "translating that into English .... "
1:11:28 min ... "what we're seeing over and over again is the only way to answer it, or, over and over it is, going to be a, it depends, it depends on the environment."
1:11:43 min .. "ultimately" "the only really truly scientific way you can answer a question like that is, what does this gene do in this particular environment."
1:12:11 min ... "quote" ... "summarises this entire point ... "
1:12:31 min ... "there is no such thing as a gene influence outside the context of an environmental interaction."
1:14:39 min ... "ok, you're an epidemiologist ... the answer is: what sort of environment ... "
1:18:09 min ... 1:20:54 min ...
13:52 min ... "really really major room for things going wrong in terms of it being then applied clinically"
14:33 min ... "bioethics"
15:50 min ... "actually finding the gene"
32:09 min ... "chance"
32:38 min ... "Brownian motion"
(MIT OpenCourseWare
18. Itõ Calculus
Instructor: Choongbum Lee
th-cam.com/video/Z5yRMMVUC5w/w-d-xo.html
0:50 min ... Brownian ...) ... ?
50:29 min ... 50:40 min ...
(B.t.w. completely non sequitur, cute accent after, "the only".)
Taking a completely wild lunge, trip and fall, smack down on the floor in the dark, i.e. me being me and putting a foot most likely not on a line while not having optimal proprioception, and making a something of myself, culminating in blushing profusely, but .... I'm curious ... has something like PKU have anything to do with the following ....
0:14 min ... "this conflict began nearly 20 years ago"
0:16 min ... "2443 US Military KI"
0:19 min ... "3800 contractor and DoD civillian KI"
0:23 min ... "1144 allied troops killed in action"
0:27 min ... "over 30000 veteran suicide since 9'11"
1:44 min ... "infrastructures needs did not leave 10 to 15000 Americans, stranded."
1:50 min ... "climate change did not cause this catastrophe."
1:53 min ... "combat is not a power point briefing."
1:55 min ... "American lives are at stake."
1:58 min ... "get our countrymen out of Afghanistan."
2:01 min ... "the mission is only complete, when they're out, not one minute before."
Approximately, 2500 military killed in action compared to 30000 veteran suicides ... 1:12 ... ? For every military person who was killed in action, 12 veterans committed suicide?
It looks like more contractors and civilians were killed in action than those in the military? Do they exhibit suicide rates similar to veterans? It doesn't sound like they do? What is the difference?
'GOP Lawmaker: 'No American Should Be Willing To Tolerate' Conduct Of Afghanistan Withdrawal'
Forbes Breaking News
th-cam.com/video/cUgvrS78lbc/w-d-xo.html
Also, I don't have a reference for the following, however, I thought I heard it said in the last day or so, on some media yt video or fb, that President Biden mentioned, his son and other military personnel, who returned from Iraq and had some sort of brain complications within a year or around a year later?
I updated my yt name ...
@@eleonoraformatoneeszczepan8807 is this incoherent rambling about a dozen topics supposed to mean anything? Why are you quoting random video parts? I don't even know why I'm asking, you're probably a bot.
@@twrk139 are you a bot? What's up with language these days. Some people, I don't know.
@@eleonoraformatoneeszczepan8807your comments really sound like they're coming from a schizophrenic
In this lecture a reference was made to introductory and advanced lectures by Teaching Assistants and other professors about endocrinology and (something else). Are those lectures available to non-students? Thank you.
Holy smokes, they just get better and better.
57:28 tripped me out what the hell I was saying 100% in my head before he explained it
For anyone interested: microarrays aren’t rlly used much anymore. Instead, RNA seq is predominantly used to assess global rna abundance