Impedance matching Physiology of hearing | Auditory system physiology mbbs 1st year lecture
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- Опубліковано 21 гру 2020
- Physiology lecture on hearing - special sense physiology talks about what is impedance matching and how impedance matching occurs in middle ear by area advantage, curved membrane effect and lever action.
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You have understood a concept when you can explain it simply.
You have explained this very simply. Thank you.
Love it. Thank you so much
In order to protect the ear from loud sounds, the sound has to first travel into the ear and get amplified by the ossicles in order to reach the hair cells and be interpreted as excessively loud. Only then will the stapedius and tensor tympanic reflex activate. You have to eat the poison first in order to know it is poisonous kind of logic.
Great video as always !
Very true indeed... and Thanks for the compliment
Very true but not in case of our own voice. When we speak, our muscles of mouth has same nerve innervation as tensor tymapni. So as we speak, simultaneously it stimulates tensor tympani and sound reaches our ear will be less intensify
@Bmimsmedicos yes absolutely correct
I really want to hug you for making this concept so easy. you are so amazing and clearly very good at explaining things! god bless you
Thankyou so much
Awesome explanation, best I've seen so far
Thanks. Glad it was helpful 😊
@@PhysiologyOpen it was quite helpful
Damage to ear in loud sound - because the tympanic reflex(attenuation reflex) has a latent period of 40-80ms. So when a very loud sound traverses the external ear in a very short period of time(as in bomb blast) the attenuation reflex(tympanic reflex ) does not get to work there by damaging the ear.
👍👍👍
interesting
Mam you are real hero thank you so much for making this concept easier ..
Thank you for such beautiful comment. It means to me a lot 😊
Most underrated channel I've ever seen.... don't worry Mam... You'll reach great heights some day! HOPE 🔥🔥🔥
I hope so too!
maam I love your explanations. short and straight to the point. you are among the people who are making my journey of becoming a doctor smooth.
Thats the goal, easy journey with strong concepts
Omg thank you so much I've been struggling with this concept. Brief and perfect explanation!
You're very welcome!
Such an amazing video ! Thank you for such a brief concise yet informative video !
Most welcome
I’m so glad I found this channel❤ thank u so much for helping me understand the topic
Thanks for liking
Thank you ma'am for explaining the Concept in a very nice way ❤ 👌
My pleasure
Thank you so much for your great contribution! I really enjoy your presentation. Not that I have chosen to be a bit discriminative, but I really love how my female Indians teach. Everything is with enthusiasm and motivation blended with calmness, care and courage.
Thank you for the motivation…it’s always needed
In love with the way you teach!
Thank you so much !!!! really happy
Best conceptual explanation of such a difficult topic
Thanks a lot
Thanks. Glad it helped 🙏
Back here again, in third year for my ENT. Amazing video as usual!!!!
Yayyy! Thank you! Physiology is the core
Me too!
Mam u deserve millions of views,I will recomend this chanel to all my collegues and Juniors.
Thank you so much…will be of great help ❤️
Stapedial reflex lasts for10s and after that stapedial reflex deacys and regenerate effective if sound level70_100db above person's threshold.sound louder than it may cause muscle fatigue or during the period between reflex decay and regeneration loud sound reaches OHCs and can cause demage.
❤love your lectures..
For stapedial reflex to occur, sound must reach inner ear first and then action potentials to brainstem. So very loud sound can damage inner ear hair cells
Thanks for crystal and clear explanation
Most welcome
Omg thank you sooooo much for this video!
You're so welcome!
Dear Mam your videos are very helpful. thank you so much
It's my pleasure
You are amazing; thank you for explaining it so beautifully ❤❤
My pleasure 😊❤️
🤧😭Am from AFRICA,Malawi and you have just saved my First year of Medical degree. I could just kiss you rn❤
😊
Ma’am my answer might not make sense😅
But i think because of prolonged exposure to the loud sounds, maybe the muscles which were pulling the ear ossicles could get fatigued and relax, causing damage to the hair cells in the cochlea.
By the way your videos are really good.... and helped me clear many concepts. Thank you so much!🙏🏻🙏🏻
Could be. Never thought that way...need to check.. !
ma’am I caught your “stapes” correction🤣🤣🤣. really appreciate your effort
😂...while recording got carried away and was doing wrong pronunciation...🤣..so far so good
Thankyou so much!
Most welcome
Best explanation Mam🔥
Thanks 😊
I think acute loud sound damage our ears because it can't initiate the attenuation reflex which prevent us from damaging effects of loud sound, it occurs before its latent period which is 40 to 80 m.sec so i think that if sound reaching earlier than latent period it will damage our ears.
Corrrct...but sound will reach ear rather has to reach inner ear to initiate the reflex...so if it’s too loud..it will damage the ear
Thank you sooo much, this helped a lot 👍
You are welcome 😊
Actually it takes a bit time to generate reflex for contraction of these muscles, in case of acute loud sound there isn't enough time ti generate reflex so it damages ear.
May b this is the reason of question which u asked?
Yup. Bingo
Its so loud that loudness damages it on first exposure before the reflex response occurs
Just phenomenal
Thanks
Thanks for a wonderful comment
Concept clear.. Thanks a lot ma'am
Most welcome
Wow that is a really good explanation
Thanks
You are a physiology goddess!!!!
Aww..so sweet. Thank you so much
Thank you mam
My pleasure
You made this topic so soo easy for us.. thankyouu 😊. To-the-point and smooth explanation.This video deserves more like 👍
Glad that you liked the video
Great explanation ma'am!!
Thank you 😊❤️
Within the fraction of second at which acute loud sounds ,like.. bomblast..are vibrating the ossicles... the attenuation reflex doesn't happen quickly..it takes time...hence..acute loud sounds are harmful.
Bingo...yes its a reflex..so it takes some time to respond..
youre amazing mam tysm
Thanks and pleasure is mine
Damn...💖💖u r the best ma'am
Thanks..😊
thank you ma'am
My pleasure
Thnx alot mam ❤
My pleasure always. Thanks for liking
thanks maam..
Most welcome
Nicely explained.🙏
Thanks 😊
Damage to the hair cells in the cochlea due to prolonged exposure to loud sounds mainly damage to the stereocilia
Yes...that occurs in case of exposure to loud sounds for long duration...despite the reflexes in middle ear
thank you
You're welcome
Thanks alot mam🙂
Most welcome 😊
Wow what an explanation loved it
Glad it was helpful!
@@PhysiologyOpen it really was ma’am please continue the good work
Thank you mam tomorrow is my uni
All the best
🥰🥰🥰 Great Explaination
Thank you 😊
Thank 😊
Welcome
Very Well explained!!...was always looking for such explaination..
So glad
Now i understand how u got into aiims
😀
maam, that was interested topic, thank u for sharing.
actually i have one question to ask i.e acoustic reflects will help in protection of inner ear when loud sound is stimulated, but to stimulate acoustic reflects (i.e tensor tympanic and stapes muscle) the sound has to pass inner ear first (according to reflects pathway) so, how it will protect the inner hair cell as sound is already expose to inner ear before stimulating acoustic reflects?
Wow...that’s a beautiful question. Your question is a partial answer itself. Reflex takes some time to act and that’s why very loud sounds do damage hearing. Also chronic loud sounds do damage hair cells themselves for the precise reason you stated....
thank you maam
Thanks
You are welcome
Wonderful madam
Thanks. Glad you liked it
Acute loud sound do damage ear because loud sound intiate reflex contraction of middle ear muscle after a latent period of 40-80 ms,ma'am is that correct?
Yup. Absolutely...if it can damage before 40 ms, damage will happen
Thank you ma'am
It's very helpful ma'am thank you so much❤️
So glad
what's significance of curved cochlea?
Anywhere curving in body - increases surface area…cochlea is in a small bone but because of curved structure it’s enough to have adequate length of membrane for pitch discrimination
Mam u said, output pressure increases by 46 times more than input. Could you please share a research paper or book giving this information with me?
It's for my mtech thesis
You can quote Ganong - it’s a reference book for physiology
👏👏👏
😊
Do u provide notes
Yes I do . Check them out here
physiomed.winuall.com
Ya but nature or creator of human body mind could have directly placed air medium and protective sensitive sound wave receptors, simple ! Why to add fluid to cause impedance and then to overcome that, again to add ossicles and middle war cavity complex structure strange ! Anyways its a good video!
True…may be in some place in the universe , that does exist…
@@PhysiologyOpen hahahahah 😂 ya I wish I did genetic engineering plus astronaut enginnering to create certain species with such war direct air sound interaction in air no fluid... Short cut simplified body no long complex route 😂😆
Yeah we wish
Ma'am aap Parmatma ho
Nahi kahan...just a humble being