Special Senses | Vestibule | Maculae: Utricle & Saccule
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- Опубликовано: 1 окт 2024
- 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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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 .
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😊
👌
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
This video deserves WAY more views! Thanks for sharing!
I agree. Already shared it on fb and twitter
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
"It's so cool .I promise " this line was so motivating 👍👍👍
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 :)
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
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. :)
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
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
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!
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!!! :))))
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
Please make a video on postural reflexes as well.. would be very grateful
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!
BEGGING US TO SUBSRIBE!? Man, you don't have to, please! You're literally really really amazing! Thank you for all your hard work and efforts!
What is the difference in impulses when action potential is less and more....what about the detection of head postion by brain...please explain..i did nt get that
You rock! Thank you for making neuroscience enjoyable and more interesting
I really hope that u would add a smell and taste lecture under special senses. Thanks btw Zach :)
small mistake in the video the otoliths are heavier then the otolithic membrane and hence they dont move forward as much as the haircells and surrounding which causes hair cells to shear against the otholiths during acceleration
Thanks for this amazing video..really nice.. I am from INDIA
Vestibule-
Outer bony labyrinth
Perilymph.
Saccule utricle
Inner membranous labyrinth
Endolymph
Special detector
Sensory epithelium
Macula
Hair cell on saccule facing outside on wall.
Hair cell utricle on floor facing upward...
Supporting cell
Vestibular dark cell
Hair cells1 n2.
Otolithic membrane
Otoconia......
Utricle linear acceleration and head tilting.
Saccule vertical acceleration....
Thank you sir
As usual thank you
saying thanks isnt enough anymore
a million of thanks
BRUH U ARE A NINJA NERD NOT US
BIG UP AND THANK YOU SO MUCH
MAAAAANNNNNNNNN I'm enjoying this science because of uuuuu🙏🏻🙏🏻🙏🏻🙏🏻🙏🏻🙏🏻💗💗💗💗💗💗 god bless u and all the team 🌹🌹💙
You're awesome. I'm searching for tons of video and till I find you everything seem bright and clear totally. I really appreciate what you've done and do you know that this help me alot. Thank you bro
I'm getting my Doctorate in Audiology and all of your cochlea videos and ME stuff got me through A&P!! Now i'm in Vestibular class and I recommend your videos to all of my classmates!! I'm very visual so your videos are amazing!!!
It was an amazing video... I just had one doubt... Let's say a person is skydiving... Which macula gets stimulated...? Utricle or saccule..?
i observed this.....his material is as good as dr. najeeb lectures .......but one advantage is he is way faster and to the point without missing out the concepts....
Agreed! Your videos are my first step in introducing myself to the material and then I check out the professors notes and it makes so much sense! Thank you so much for what you are doing!
am in love with this perfection
I have holiday right now , but I'm still watching you . you're really helped and I really thank you ninja nerd
you made my study easier and more fun
thank you so much
It makes so much fun learning with you!!!
God thinks of EVERYTHING!!! PS EVOLUTION IS STUPID!
So informative. This is what I’m looking for. Highly commendable
When you are shaking your head sideways following the beat of the music. Is it involve crista and cupula? or utricle and saccule?
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.
I love ur tips and tricks for remembering hard words, like utricle :))
You are awsome ... Thankyou so ... Much .. sir .. it realy helps me in exam ..
Hello. Could i transfer your videos into my language (uzbek), If you are not against.
🙏🏼 professor 🙏🏼👏🏼👏🏼👏🏼
please tell me - what and where is the horizon pattern. why do you sense the level if you are blind or it is dark.
So stepping onto your gas pedal would be an example of utricle? Due to horizontal acceleration being involved?
Thank you....
A lot of confusion has been removed🙂🙂🙂🙂
It would be great to highlight that these are tonic receptors and since they are firing as a consequence of the load of gravity, they also change their output in relation to changes of effective load (or modifications to the vector of gravity). When the body tilts, gravity is from another vector. When we experience linear acceleration, this too is a modification of the gravity vector. A simple but accurate concept.
Awesome and understandable lecture. Love from india 🇮🇳❤️
When you say low freq. vibrations do you mean below 20 Hz?
Man.. You r just amazing..
NINJA GAAAANG
Wonderful explanation.. Keep it up. Love from India ❤️
You are amazing at what you do. Really appreciate your teaching skills
who kissed you ..it wasn't meee :O ...but still grateful for the vids
Stupid
I would like to say that It will be so so much better if you add some abnormally examples.. (diseases)
there is no way this guy acctually talk like at normal speed i always listen to him x1.75 and by now im so used to it
A very immature way to remember differences between utricule and saccule is the fact that ball sacks hang. That is a vertical relation and thus the saccule will detect vertical movement.
Thank you so much ! You saved me so much energy of trying to understand it by myself from my shit textbook !
While hyperpolarisation,how sir information is carried regarding that position of head to cns? How our cns knows the position?
You've helped me so much with my studies and you explain everything so clearly. Please continue making these video's! :D
17:14 me knowing physics and role of inertia, trying to digest this explanation 🙂🙂
You’re a great teacher. You make this stuff so interesting and fun to learn.
Thank you sir for your wonderful teaching
I have Ménière's disease and PBBB and this really helped yo explain it!
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.
Thanks Zack! You’re the best everrrr!!!
Is that a hickey behind your external ear😆
Reading 4 pages about the same thing and not understanding and learning made me depressed, but after watching videos in this channel taught me whole thing i dint learn by reading😅
Thanks for beautiful lectures☺
Teşekkürler.
Thank you so much for helping us in our exams
It's an awesome work you have done ❤️❤️love from India
I always watch ur videos on 1.5x...😍
Physiology of vestibular system video plz share
I appreciate your Great concept thank you💓 from Pakistan
you hade done vastibular pathway plzz anyone show me link
Search for striola
forward And backward there is depolarization
amazing u are amazing
This is just so amazing he teaches with such passion thank you soo much for this ❤
In your words I have "huge mumbo jumbo'' respect for you
thank you so so much for this. you're a lifesaver!!
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!!
Bruh I learn more from you than from med school. Thanks man!
So, I can taste the salty sweet fluid, but what is the iron/ metallic taste before that?
thank yuuuuuuuuyy💙
so amzing.... realy made physiology interesting........
You explaination and information has really helped me
Do the haircell face oposite in the saccule to detect up and down? Or do they all face the same direction
U must be in Marvel because of this superpower
A huge thank you Prof. Murphy🎉🎉🎉🎉
May god bless your heart and your life, you’re such a hero!
16:30 Shouldn't the K+ channels open if the stereovilli bend AWAY from the kinocilium? Afaik that's how Najeeb explained it
Good video!
EDIT: I just checked the Boron, you are right, bending towards the kinocilium means opening K+ channels = K+ influx = AP produced!
thank u so much/ u so smart and explain good!!!
I hope you're rich the way you have saved my entire first year!
I understand. Your lectures are just brilliant!
Thank you SO much! You break things down really well, & help turn "general ideas" into "well-understood concepts", & do an amazingjob of incorporating ALL important info. I need to know for exams. I'm 100% sure that watching your vids have raised my grade by "at least" 1 whole grade:) TY!
I'm a Nuclear Medicine student, & "NinjaNerds" vids, are Req. for my A&P courses. My peers love you & my professor does, too:)
Would that be AP or graded potentials @ 20:15?
💯👏👏
Luv from india ...love ur explanation 💯
So I really struggled to understand the concept of the two labyrinths - but I found it easy to think of it like this:
Imagine it as a sausage roll.
You have the outer crusty layer (the Boney labyrinth with perilymph) and the inner layer of meat or whatever (the membranous labyrinth with endolymph).
The important think to remember is that the boney labyrinth SUSPENDS the membranous labyrinth. just like the crust "suspends" the meat. I used to get confused and think the two labyrinths were in different areas. Hope this helps someone lol
Thank you for making these videos sir
Dear Zach, you are truly the best teacher I have ever listen. I am ENT
and I am from Serbia. It was always and still is very difficult to understand vestibular system and examination. So, I would like to ask you to make a video for clinicians about HINTS testing, central and periferial vertigo dif.dg.. Also nystagmus examination and dif. dg.
How to approach to a patient with vertigo- chronic and acute?
Also it would be nice to make some more videos about tinnitus.
This is a huge and very difficult area in medicine and you will help to many clinicians.
Thank you