Special Senses | Vestibule | Maculae: Utricle & Saccule

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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#ninjanerd #Vestibule #EENT

[@trinilovessf]

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

[@030crash]

amazing! thankyou for this tip

[@janusbanana2017]

wonderful! And I myself do a little bit modification: U -> Up, and S -> Sideways

[@Dave_M.]

@@janusbanana2017 same here ;)

[@mitza420]

thanks😊

[@kumaradarsh3983]

👌

[@magicwinx8237]

How on earth does he understand everything and is capable to explain it in such an easy way 😂?

[@mangajunction8762]

Isn't he .. ✨

[@samo2616]

he is the messiah.

[@dudethatsbad8541]

@@samo2616no one is laughing bro

[@syhillahmed3824]

Hard work, Research and study plus a good team .

[@jenifaahmed527]

"It's so cool .I promise " this line was so motivating 👍👍👍

[@harshitmallick4121]

This guy's the one saving my med studies now. Love from india♥️ Great job

[@chirantantemle5201]

i wont be able to my my exams without him lol

[@nannomaniac]

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

[@user-lg2nz3xe7x]

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

[@aspired2be]

You’re a great teacher. You make this stuff so interesting and fun to learn.

[@LinhTruong-jk8zq]

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

[@kimschurman8728]

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!

[@MelanieGloria]

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

[@denisskenderovic3707]

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.

[@drananthk]

You’re awesome bro, made me understand the toughest topic in easy way

[@sharp87]

This video deserves WAY more views! Thanks for sharing!

[@dejesusrussell]

I agree. Already shared it on fb and twitter

[@ellenaerts2199]

You've helped me so much with my studies and you explain everything so clearly. Please continue making these video's! :D

[@morganbrown8915]

You rock! Thank you for making neuroscience enjoyable and more interesting

[@georgia9584]

I loved this video, ive been doing an entire semester of physiology and only this video has managed to actually break it down from the beginning and explain each section and what it does and what its called. you dont assume knowledge. thank you.

[@leahhall7504]

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!!

[@maisa449]

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

[@hamdasn7291]

16:15 "GOING DOWN !!!! GOING DOWN !!!!" love him so much!!! :))))

[@weehee1673]

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!

[@sarahfiedler8023]

This is the first video I have watched of yours and it was incredibly helpful !! I was so confused by the action potentials and the macula and you totally cleared it up for me !! Super grateful for your time and energy! You are very good at explaining the concept and I love the drawings, labeling and different colors, that is exactly how I write how my notes. Thank you !!!

[@edilbertoramos3045]

So informative. This is what I’m looking for. Highly commendable

[@tanyabrown3171]

This very visual teaching style is just what I needed ! Thank you !

[@UTMBRAMClassof]

Clear, concise, with great analogy. Can't thank you enough.

[@asohrichardson7619]

Watching ninjanerd videos makes me fly over my textbook is seconds! You're just a blessing to medical students Prof 💖💖

[@am.b.1552]

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 :)

[@elinaparkkonen517]

I LOVE your endless enthusiasm for whatever the subject you're teaching, it makes learning so much fun!! 😊 Can't THANK YOU enough❤💕❤💕❣ What a weird & beautiful & awesome & complicated system we all have within our bodies... There will always be questions that remain unanswered. Take care, best wishes from Finland 🇫🇮💕❣

[@shobasharma7192]

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.

[@lau_ducharme7409]

I watch this for one of my class and it was the clearest explanation i’ve had in a long time! Thank you !

[@firaerniezaabdulrauf2113]

You’re born to teach man. Ur message r so clear n easy to understand!!

[@janwalor736]

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

[@kirandey1744]

This is just so amazing he teaches with such passion thank you soo much for this ❤

[@techib381]

Thank you for the video! Your explanation is really to follow and easy to understand! 👏🏼

[@itsmeaddie]

Studying for boards and you made it easier for me to understand things I barely remember. Thank you so muuuch!

[@renu.ritambhara]

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.

[@utsabbandyopadhyay3931]

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.

[@ginasofia8908]

Wonderful job! I cant thank you enough for ALL your videos!!

[@Prestonover]

I appreciate all of your videos so much! You are a great teacher!

[@hendabdalmonem2316]

I just love how you always save me before exams, i used to hate this topic but i very much enjoyed watching this ❤️❤️😭😭

[@federicasechi4991]

Watching this in 1.5x and it feels like you're on speed, loving it

[@krios0086]

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

[@sakinamustafa7140]

You are amazing at what you do. Really appreciate your teaching skills

[@parinazhosseini1744]

the most underrated channel ever... you deserve all the credit

[@svprabhu.26]

Man, you are just amazing !! I love your enthusiasm to teach us ❤

[@maryamalam6027]

You put a lot of effort in your vedios and they're great. Thank you so much , I deeply appreciate it

[@user-ow5ss8td3g]

I really appreciate your videos!! I honestly wished more people supported your channel!!!

[@zahraanajah5590]

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

[@holden2966]

I really hope that u would add a smell and taste lecture under special senses. Thanks btw Zach :)

[@magicwinx8237]

It makes so much fun learning with you!!!

[@immadullah2474]

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...

[@CelesteCKing]

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:)

[@meridiary5046]

Doctor!!!!! I don't know what i would've became without ur help! thanks a lot

[@krupasankhe425]

Amazing!!! Explained like a pro.... good job sir!!

[@ninamurgolo632]

Fantastic video! You keep my interest form start to finish. Thank you!!!

[@dnaak]

I'm 34 and thinking about getting into hearing care and these videos are so interesting. Thanks for your time.

[@gracelynong201]

thanks for making this topic so much easier to learn!

[@aslmervegokce5814]

Thank you so much!!! You are literally making everything fun and easy. Love from Turkey!🇹🇷❤️

[@ahmetbugraaslan7634]

Perfect as always, thank you Zach the Goat

[@karanbhatt2491]

This guy is so f**king underrated...!!!The only Profesor I respect...🤪

[@chrisshoemaker67]

Yeah, well it's professor. You should of threw some respect at your middle school English teacher.

[@shoumenadhikari3321]

@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

[@elise8539]

You’re actually making me become a biology lover, I can leasing to you the whole day

[@ibrohimrajabov8770]

Awseome, u ar the best teacher that i had during these years in my medical carier

[@Popsicle0801]

Great video with down to earth explanations!

[@ginasofia8908]

Thanks Zack! You’re the best everrrr!!!

[@mubumir1350]

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

[@itsazba]

Appreciate your video! Will help a lot in my medical exam!❤

[@nicolesefershayan6060]

awesome, awesome video. seriously simplified everything

[@yhzh9931]

so amazing! thanks for explaining it so well and the drawings are so cute as well

[@brokecowpoke2675]

Thank you so much man, extremely helpful. You’re a great teacher. -Veterinary Student

[@marijakrstic9626]

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

[@maths_doc]

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☺

[@climbhigher4150]

You are just amazing!! Thank you so much for making this so easy.

[@ritanassar4269]

You are so amazing. I love your explanations, Very helpful!

[@shannonneal4494]

thank you for this- you are wonderful at teaching!

[@mariaaljammal8566]

you are the best thing I Have ever watched!

[@manny3016]

Loving the enthusiasm!

[@nero91]

After 5 years of medicine this is still the coolest thing in the human body to me

[@kunukandayashodha2166]

you gave it in a nutshell thanks you are awesomely talented .

[@prakritikatwal2328]

best till now. thank u sir. keep on uploading videos.

[@manalemad1589]

saying thanks isnt enough anymore a million of thanks

[@afshanmehboobkhan8746]

what an excellent demonstration, stay blessed

[@khadija6139]

thank you from the bottom of my heart

[@136nandmarcusjoseph4]

You are awsome ... Thankyou so ... Much .. sir .. it realy helps me in exam ..

[@jessicacammarata3912]

This is really excellent. Thank you for making it. Just one point of clarification- if your head is tilting forward or backwards, you are actually stimulating the anterior SCC. The utricle senses horizontal linear acceleration/deceleration when the head is stationary.

[@niduresidue]

thank you so so much for this. you're a lifesaver!!

[@nadyaamalia4101]

this helps me a lot, thank U so much for making this video!

[@josetrujillo738]

You are awesome! I love Ninja Nerds!

[@jeremiegagnon1292]

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!

[@SuperIsaacVideos]

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).

[@jacobpickett5085]

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.

[@xDomglmao]

@@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.

[@jacobpickett5085]

@@xDomglmao seems right!

[@luisrodrigueziii7316]

My only regret is not finding you earlier. God bless you man.

[@ahmedalthobaiti4160]

As always, you are super legend.I am very grateful to you, thanks.

[@genan2002]

May god bless your heart and your life, you’re such a hero!

[@bupechikumbi3082]

Watching this for a second time just for emphasis. Thank you

[@kehkishanazhar6713]

I loved your video. It made my concept clear. Thanks for making it so easy for us. Love from Pakistan.

[@elizabethwairimu2920]

Thank you for this special senses series

[@prasadsalla9614]

you are awesome .you saved my life many times

[@ASHTUTORIAL]

Thanks for this amazing video..really nice.. I am from INDIA

[@michaelmoleele1754]

BRUH U ARE A NINJA NERD NOT US BIG UP AND THANK YOU SO MUCH

[@joshmywilson6074]

Thanks for making this topic clear

[@natalieedelstein]

I have complete absence of signals to the brain from one saccule and suspect that I have some utricle issues too given that the car example is exactly the thing that makes me one of the most dizzy. Elevators that aren't smooth-gliding cause me major issues too when they bounce when landing on the floor. My brain also fails to compensate for my saccule's inability to send signals to my brain. This is so helpful to me in understanding my medical issue. Thank you!

[@EverydayK9Solutions]

You are the man, very impressive work.

[@salam7905]

thank you so so much I really appreciate your hard work 💜you're my calcium carbonate crystals that keep me balanced in my studies🌼

[@denisenemeth8357]

Awesome video!! Very well explained.

[@hardenashley3]

You're awesome! Thank you for your explanation!

[@zarithsyafiqahramlee524]

your video really help me more understand about balance system. thanks a lot:)