Special Senses | Vestibule | Maculae: Utricle & Saccule
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- เผยแพร่เมื่อ 21 ธ.ค. 2017
- Official Ninja Nerd Website: ninjanerd.org
Ninja Nerds!
During this lecture Professor Zach Murphy will be teaching you about the vestibule, maculae, and paying particular attention to the utricle and saccule, while taking a microscopic look at their functions. We hope you enjoy this lecture and be sure to support us below!
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![Anatomy | Physiology of the Utricle & Saccule [Otolithic Organs]](/img/n.gif)
Utricle - U --> the shape of the U with hair cells pointing up
Saccule - S -> shape of S with haircells pointing out
Then envision the direction of movement that would cause the prongs of the letter to sway. i.e. left to right or horizontal for U and up and down or vertcal for S
amazing! thankyou for this tip
wonderful! And I myself do a little bit modification: U -> Up, and S -> Sideways
@@janusbanana2017 same here ;)
thanks😊
👌
How on earth does he understand everything and is capable to explain it in such an easy way 😂?
Isn't he .. ✨
he is the messiah.
@@samo2616no one is laughing bro
Hard work, Research and study plus a good team .
This guy's the one saving my med studies now. Love from india♥️ Great job
i wont be able to my my exams without him lol
"It's so cool .I promise " this line was so motivating 👍👍👍
hello zach, i think i owe you and your team a big big thankyou as a person from a middle class family living in a place with high inflation rates someone who cant afford tuitions your channel and lectures mean alot to me, i rely on this channel for anatomy physio and sometimes biochem as well, ninja nerds was a huge part of my first year mbbs and i ended up getting distinction in each subject i dont understand local tutors at all but you're here saving my day, thank you so much
This video deserves WAY more views! Thanks for sharing!
I agree. Already shared it on fb and twitter
You are truly a blessing to all of us, medical students. I wish if i could dedicate my tuition to you and if I wasn’t a poor medical student, I would have definitely donated!! Thank you so much for your enthusiasm, i was never more excited to learn about the vestibule but your excitement is contagious
16:15 "GOING DOWN !!!! GOING DOWN !!!!" love him so much!!! :))))
Dude I just have to tell you how much I appreciate you making these videos. I'm halfway through my second year of Audiology school and your vids have been a lifesaver all along! I've watched all the ear related ones and now that I'm starting to study the vestibular system I REALLY need help. Keep it up! Much love!
I know you read the grateful comments for your job and maybe sometimes you just...but I also feel I have to thank you. I do it under this lecture because yesterday was my last exam (physiology) and my main theme to write was for the vestibular alongside semicircular canals. Also I had exchange of CO2 and pancreatic juice. The examiners were impressed how well I understod the material and I passed it with A. This whole 2nd year I was studying alone using your videos and other ones and they helped me a lot (mostly you did help me) and so again I wanna thank you your passion and great way for teaching many people like us,medics,or just curious one. Keep going with the same spirit!
P.S. I know maybe I'll be annoying but I see many people have problem with Physics. I think you should make such content,with your way of explanation all will understand the laws from the 1st time :)
literally thank you i was rewatching the same parts of one lecture for two hours and i didn't even pause once throughout this video to clarify what you said because you explained everything so well
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you are AWESOME. You saved my life several times till now. I hope you always stay this excited with your job, keep up the good work!! love from Greece
Watching this in 1.5x and it feels like you're on speed, loving it
Im watching all of these vids on 1.5-2x speed so that i can cram as many as i can xD i love that he actually speaks clearly enough that you can understand him even twice as fast
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You've helped me so much with my studies and you explain everything so clearly. Please continue making these video's! :D
A sincere appreciation comment from me and probably many other students - this has been the most helpful, precise and detailed explanation available to me, after hours of effort put into understanding. Thank you so much for this video!!
I always watch your videos as part of my study schedule and it freshens things up and helps me a lot ! Best of luck to you good sir :D.
You’re awesome bro, made me understand the toughest topic in easy way
This guy is so f**king underrated...!!!The only Profesor I respect...🤪
Yeah, well it's professor. You should of threw some respect at your middle school English teacher.
@chris actually we some Indian's love to speak in English to maintain status 😂. literally those status maintained people haven't idea about spelling and also grammar hahaha. By this attitude some Indian's wanna divided us via lower class 😂... by so-called speak in english .... beleave me or not literally that's going on here... Some people who only knows only 2 slangs f***!!! And shit!!! 😂 Out of this they have no knowledge...and they simultaneously use that!!! It doesn't matter if it's a good place or a bad place but they have to use ..lol
So informative. This is what I’m looking for. Highly commendable
Clear, concise, with great analogy. Can't thank you enough.
Hey there, I am a novice with no background of science and anatomy but I am able to understand the way you explain. Making the concepts real through drawings and life examples, is especially helping me. thank you.
This very visual teaching style is just what I needed ! Thank you !
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You're just a blessing to medical students Prof 💖💖
Wonderful job! I cant thank you enough for ALL your videos!!
saying thanks isnt enough anymore
a million of thanks
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This is just so amazing he teaches with such passion thank you soo much for this ❤
im a first year medical audiology student.....and im really satisfied with the way u teach....its very easy for me to understand it...thank you bro....u are better than my lecturers.
As an old pilot, skier, motorcyclist I've been telling anyone that would listen, it's all about your scan, what you're focusing on and how you hold your head. Now I can see why. Thanks for sharing
It makes so much fun learning with you!!!
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You’re born to teach man. Ur message r so clear n easy to understand!!
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Perfect as always, thank you Zach the Goat
SIr you are awesome .. don't have words enough to thank u,you make medical lectures so fun and easy. Lots and lots of love to you from India.
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Doctor!!!!! I don't know what i would've became without ur help! thanks a lot
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awesome, awesome video. seriously simplified everything
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a good way to remember the direction of the hair cells of the utricle and the saccule is to remember that hair cells of the U-tricle are pointing U-pwards, while those of the S-accule are pointed S-idewards. :)
Loving the enthusiasm!
Thank you so much!!! You are literally making everything fun and easy. Love from Turkey!🇹🇷❤️
You are awesome! I love Ninja Nerds!
You are so amazing.
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you are the best thing I Have ever watched!
thank you for this- you are wonderful at teaching!
You are just amazing!! Thank you so much for making this so easy.
Awesome video! Thanks for the recap, helped a lot!
One tiny thing though, when you break or slow down in your car, the otolithic membrane doesn't move forward because it ''makes you tilt your head down'' but because of inertia. Your cranium stops moving but the otoconias don't, which is why they move forward (toward kinocilium) and depolarize the hairy cells.
Good luck with your exams!
See this is what tripped me up. His physics was weird here.
Do you think you could clarify things further?
Imagine you have otoconias in the utricle. As you accelerate in the car, the cranium moves forward and the otoconias are dragging behind, stimulating hair cells.
When you stop, suddenly the otoconia slide forward, stimulating the hair cells.
Are those two subsets of the hair cells distinct? Is that how the brain decodes the direction of linear acceleration?
Is the orientation of the stereocilia really the key here? Hence the utricle is only sensitive to acceleration in a 2D plane (forward back, left right), and the saccuule to a different 2D plane (up down, left right).
I don't know. I feel like if you slammed the breaks, and your head shot forward, the otoliths would move backward. Then when your cranium stopped, they would catch up and move forward.
@@jacobpickett5085 How I got it: Head = solid mass, endolymph = viscuous.
When you suddenly move forward, your head manages going anterior but the pudding (endolymph) in your head doesn't yet, so it remains posterior. Since endolymph kind of sticks to otoliths, remaining posterior means otoliths remain posterior; otoliths are attached to the otolithic membrane, so they drag the otolithic membrane also posterior; otolithic membrane remaining posterior equals hair cells bending posterior.
When slamming the break it's just reverse. Essentially, head moves faster posterior than otolithic membrane, so hair cells are bending anterior.
Please correct me if I am wrong though.
EDIT: You can skip the part with the endolymph, I just checked the Boron and it seems like it's not even involved in the otolithic organs. It's purely the otoliths' inertia that matters. Endolymph movement is only important for the semicircular canals where it leads to bowing of the cupula.
EDIT2: Ok, I think I got know why it was confusing at first. The whole thing with the inertia does only apply to acceleration. If you tilt the head the otoliths will trigger ipsilateral AP firing while contralateral no AP are fired.
EDIT3: "If you tilt the head the otoliths will trigger ipsilateral AP firing while contralateral no AP are fired." this is not entirely correct. Actually, e.g., even though you tilt the head to the right, even some fibers from the left side will fire. Boron has a nice pic.
@@xDomglmao seems right!
thank you from the bottom of my heart
Awseome, u ar the best teacher that i had during these years in my medical carier
Appreciate your video! Will help a lot in my medical exam!❤
I feel like crying, you've made such a difficult topic a piece of cake 😃 I was going through my teacher lecture's note & couldn't get it. After that I give it a read in guyton but that was of no use. Then I came here & boom 🤗🤗🤗 thanks you so muchh...
Awesome video!! Very well explained.
I'm 34 and thinking about getting into hearing care and these videos are so interesting. Thanks for your time.
After 5 years of medicine this is still the coolest thing in the human body to me
this helps me a lot, thank U so much for making this video!
best till now. thank u sir. keep on uploading videos.
Thank you for this special senses series
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you gave it in a nutshell thanks you are awesomely talented .
You are the man, very impressive work.
You're awesome! Thank you for your explanation!
As always, you are super legend.I am very grateful to you, thanks.
Nailed it! Nice job!
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Thank you so much man, extremely helpful. You’re a great teacher. -Veterinary Student
super like dude :) Keep it up! Thanks for you enlightening videos on difficult topics..
Thanks for making this topic clear
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Thanks for this, very helpful!
Minor correction, mainly from a physics point of view. When you're driving along and you slam the brakes, your head doesn't accelerate forwards. It appears to move forwards in the car, but in reality your head is accelerating backwards (i.e. slowing down). This is important because it means that the otoliths in the utricle will move forwards in your head (similar to how your head moves forwards in the car) because they are actually trying to keep moving forwards at the same speed (they have inertia), but the utricle is slowing down.
Class will always be a class ❤
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My only regret is not finding you earlier. God bless you man.
Perfectly explained 🙌🏻🖤
You are awsome ... Thankyou so ... Much .. sir .. it realy helps me in exam ..
Sir ur the only one whom I understand your lecture I was watching so many videos but didn't understand sir love you from Kashmir
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Great as always ❤️