This is my first comment ever on social media but I had to comment on how great of a teacher you are. We need more teachers like you, who care about the education of others. Your videos have truly helped me in desperate times during my A&P class! THANK YOU!!!
Don't mind me. 0:22 muscle fiber types(other videos) 0:38 [Video main topic] Graded muscle responses (2 main types of stimuli) 1:03 Resting membrane potential/Threshold potential(muscle cell) 1:08 Graded Response depends on Frequency and Strength of [Neural Stimuli]-primary(Somatic) stimulus for skeletal muscle fibers 2:05 Muscle Twitch relates to Motor Unit 2:23 Twitch=Rapid muscle contraction(response) from one neural stimulus 3:10 Motor Unit= motor neuron + muscles fibers (sup by motor neuron) 3:47 Recap 4:38 Structure of skeletal muscle 5:15 3 phases of muscle twitch 1)Latent 2)Contraction 3)Relaxation 10:21-contraction(cool) 11:05 Max Voltage-end of contraction(peak?) activates gates, opens channels for potassium ions to leave cell 11:57 (Relaxation) Tension decreases- reverse slide? 12:46 Recap muscle twitch 17:32 Easy on that sodium ion influx, they say the sarcoplasmic reticulum calcium release really stings when it gets in your 👀. Later mania. What up depression.
As some other comments pointed out, there is a mistake in the explanation of summation and tetanus. The skeletal muscle AP is only a few ms long, whereas the mechanical response starts with a roughly 5-10 ms delay, and finishes around 100 ms after the AP. Therefore, the sarcolemma is already repolarized even before the contraction phase of a twitch starts! Summation, incomplete and complete tetanus happens when APs on the sarcolemma are generated in a rapid succession. Under these circumstances, calcium ions are not entirely taken back to the SR before the next "package" of calcium ions are added to the sarcoplasm. So the calcium concentration is already higher than the resting level, and with the newly released calcium, it will reach an even higher peak concentration. Depending on how quick the release events happen and for how long time, it can lead to summation (the muscle does not reach maximal tension), incomplete tetanus (maximal tension is reached at the peak of contractions, but relaxation is still visible), or complete tetanus (no relaxation between the peaks).
This guy is so much dedicated to teach us and he is far away from the glamour world in which people focus on dressing well themselves he is in torn t shirt but teaching like an incomparable person🙌🙌 thank you sir 😇😇
Hi, one correction I would like to note is that the example given in the video is spatial summation since multiple neurons were used for stimulation. Temporal summation would be used in the case of one frequently firing neuron. Other than that, thank you so much for this video, these are amazing resources!
Yes! I hope that Ninja Nerds will correct this in their next video. Each muscle fiber is innervated by ONE motor neuron, and only one. Therefor, summation depends on temporal summation, not spatial.
Ninja Nerd you are gem❤, watching from India,Your way of teaching is just awesome and every single word you explained is now fixed in my mind. Thank you so much sir.
Thank u so much for ur effort sir u r amazing and the best teacher I have ever known .I am presently in my first year mbbs ur videos help me a lot sir.keep rocking sir...... 👍
Nice video but you may wish to review example of two distinct neurons stimulating same fiber - phyisologically any muscle fiber type can only be stimulated by one and only one motor unit that is dedicated to the target muscle from the homogenous motor neuron pool whereas one axon within the MU would deliver the action potential to its associated muscle fiber
Wait are you said neuron number two fires in muscle fiber? OR did you mean another axon terminal branch releasing ach to increase tension? Confused because you said there is only one muscle neuron for one muscle fiber.
This lecture appears to be confounding a fiber stimulus (with two neurons) with a graphical representation of orderly recruitment toward unfused tetanus which involves all muscle fiber types ending with summation of S,FR,FF fiber types. Solution: The two neuron example should have been on entire muscle with each neuron stimulating a different fiber type. In other words, two separate alpha motor neurons cannot stimulate the same extrafusal muscle fiber, instead the orderly recruitment of different muscle fibers accounts for additional force.
The only time i minimise the video to hit like is when the video is too too too good.....and this waz the one.....superb.....ur voice is too addictive though......😍😍😍😍
This is my first comment ever on social media but I had to comment on how great of a teacher you are. We need more teachers like you, who care about the education of others. Your videos have truly helped me in desperate times during my A&P class! THANK YOU!!!
God bless you house, your cow, you car, your wife, your brain and everything that concerns you... you a life saver
to me too
"Your cow"
@@sinister2423 means the world if you're an indian hindu 😂
cow🤣🤣🤣🤣that he sure will get it🤣🤣🤣
😂 lol it’s the cow for me
Don't mind me.
0:22 muscle fiber types(other videos)
0:38 [Video main topic] Graded muscle responses (2 main types of stimuli)
1:03 Resting membrane potential/Threshold potential(muscle cell)
1:08 Graded Response depends on Frequency and Strength of [Neural Stimuli]-primary(Somatic) stimulus for skeletal muscle fibers
2:05 Muscle Twitch relates to Motor Unit
2:23 Twitch=Rapid muscle contraction(response) from one neural stimulus
3:10 Motor Unit= motor neuron + muscles fibers (sup by motor neuron)
3:47 Recap
4:38 Structure of skeletal muscle
5:15 3 phases of muscle twitch
1)Latent
2)Contraction
3)Relaxation
10:21-contraction(cool)
11:05 Max Voltage-end of contraction(peak?) activates gates, opens channels for potassium ions to leave cell
11:57 (Relaxation) Tension decreases- reverse slide?
12:46 Recap muscle twitch
17:32 Easy on that sodium ion influx, they say the sarcoplasmic reticulum calcium release really stings when it gets in your 👀.
Later mania.
What up depression.
thank you so so much
saved me so much time, thank you! way to put your neurosis to good use... I should probably do the same haha
I just wanted to tell you, you are awesome! So glad I found this channel!!!
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The most needed person for medical students
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And thanks for helping many students
Stay blessed
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Good luck on the exams! -TG
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Thanks for your kindness and services!! ✨✨
Thanks for your kindness and services!! ✨✨
Thanks for your kindness and services!! ✨✨
Really , Sir this is amazing lecture I 'ever found thankyou Sir for wonderful explanation . Love From India May god bless you ..
As some other comments pointed out, there is a mistake in the explanation of summation and tetanus. The skeletal muscle AP is only a few ms long, whereas the mechanical response starts with a roughly 5-10 ms delay, and finishes around 100 ms after the AP. Therefore, the sarcolemma is already repolarized even before the contraction phase of a twitch starts!
Summation, incomplete and complete tetanus happens when APs on the sarcolemma are generated in a rapid succession. Under these circumstances, calcium ions are not entirely taken back to the SR before the next "package" of calcium ions are added to the sarcoplasm. So the calcium concentration is already higher than the resting level, and with the newly released calcium, it will reach an even higher peak concentration. Depending on how quick the release events happen and for how long time, it can lead to summation (the muscle does not reach maximal tension), incomplete tetanus (maximal tension is reached at the peak of contractions, but relaxation is still visible), or complete tetanus (no relaxation between the peaks).
This guy is so much dedicated to teach us and he is far away from the glamour world in which people focus on dressing well themselves he is in torn t shirt but teaching like an incomparable person🙌🙌 thank you sir 😇😇
For sure you are a good teacher, I really appreciate you, and the way you are teaching, thank you much . May God bless you
you are a life savior. keep up the good work
Thanks so much,,,so so informative and understandable 🙏🤍
Hi, one correction I would like to note is that the example given in the video is spatial summation since multiple neurons were used for stimulation. Temporal summation would be used in the case of one frequently firing neuron. Other than that, thank you so much for this video, these are amazing resources!
Indeed, finally someone who comments about it.
Yes! I hope that Ninja Nerds will correct this in their next video. Each muscle fiber is innervated by ONE motor neuron, and only one. Therefor, summation depends on temporal summation, not spatial.
No man, it is Temporo-Spatial or the mixed one.
Resting membrane potential -90mv 3:48
Threshold -55
Peak potential +30mv 10:50
Load & resistance 18:38
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Hi, i´m glad you take your time to make these videos, I really apreciate your effort . You're my inspiration. Thanks,keep doing videos please !
You
Are
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Wonderful
Teacher.
Thank
You
LEGEND ❤️❤️
Just EXCELLENT!
Thank you sm for your videos! ❤️ I don’t normally comment but seriously thankful for you making this a little easier to learn!
THIS IS AMAZING THANKYOU SO MUCH FOR THE EFFORT ❤️
You are SAVING my life. 🙏🏼
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Ninja Nerd you are gem❤, watching from India,Your way of teaching is just awesome and every single word you explained is now fixed in my mind.
Thank you so much sir.
THIS SAVED MY LIFE
i am so appreciated from your teaching!
You make medicine easy. Thank you so much!
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Thanks for this obvious illustration
Eloquent and excellent
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+Aubrey Banguis awesome!!! I'm so happy that we were able to help you thank you for the positive feedback!
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Amazing! Thank you!
Thank u so much for ur effort sir u r amazing and the best teacher I have ever known .I am presently in my first year mbbs ur videos help me a lot sir.keep rocking sir...... 👍
You are so awesome! Thank you for making this amazing videos. Better than my professors.
Thank you doc 💓
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Very helpful, thank you sir
Great lesson, thanks!
+Samantha Rossi So happy we were able to help!!!
Amazing 🌸✨
Thank u, thank u, thank u so much sir. Love from India. Don't know which country you belong to but you explained very nicely.
This was much more understandable than my prof and books combined. 👌🏻 thank you so much!
Nice video but you may wish to review example of two distinct neurons stimulating same fiber - phyisologically any muscle fiber type can only be stimulated by one and only one motor unit that is dedicated to the target muscle from the homogenous motor neuron pool whereas one axon within the MU would deliver the action potential to its associated muscle fiber
Wait are you said neuron number two fires in muscle fiber? OR did you mean another axon terminal branch releasing ach to increase tension? Confused because you said there is only one muscle neuron for one muscle fiber.
Thank you. I should have watch your video. I wasted my whole day try to understand this stuffs.
This lecture appears to be confounding a fiber stimulus (with two neurons) with a graphical representation of orderly recruitment toward unfused tetanus which
involves all muscle fiber types ending with summation of S,FR,FF fiber types. Solution: The two neuron example should have been on entire muscle with each neuron stimulating a different fiber type. In other words, two separate alpha motor neurons cannot stimulate the same extrafusal muscle fiber, instead the orderly recruitment of different muscle fibers accounts for additional force.
Yeahhh, had the same doubt....thnx for commenting
Amazing thank you
Very well explained sir, thank you. deserves a big like :)
man is carrying me through A&P
Actually ... U're my hero sir following u from Algeria 🇩🇿
thank you. big help
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Thank you very much.
learned more in 30 min than in 2 months
Thank you!!!
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BLESS YOU
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The only time i minimise the video to hit like is when the video is too too too good.....and this waz the one.....superb.....ur voice is too addictive though......😍😍😍😍
So helpful
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Chandni Singh me too
Zach I love you
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Beautifully explained, thank you so much.
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