Anatomy | Physiology of the Utricle & Saccule [Otolithic Organs]

⚡ Welcome to Catalyst University! I am Kevin Tokoph, PT, DPT.
I hope you enjoy the video! Please leave a like and subscribe! 🙏

INSTAGRAM | @thecatalystuniversity
Follow me on Instagram @thecatalystuniversity for additional helpful content and for my more fun side: Pets, Workouts, Dragon Ball Z

MERCHANDISE
Be sure to check out custom Catalyst University merchandise!

PATREON

[شذىنضال-قه]

this video saved my life and my medical future

[zack_]

It sounds like that the head flexion or turn head left cost less energy as both have less frequent depolarization as compared to head extension and turn to right which cost more energy by triggering more depolarization. So, depending on whether one wants to spend or save energy, the corresponding movements can be prioritized.

[emilychance]

Thanks so much for this info! I'm currently dealing with vertigo and this really helped me understand what's going on ❤️

[kavitajoshi]

please explain how bending flexing the neck forward is a linear movement? otoliths are sensitive to linear acceleration or deceleration. bending the head seems more angular movement which should be detected by the semicircular canals.

[bhags]

Great material! Clears things up after a lecture perfectly

[zenjinneering]

Linear acceleration does not mean linear direction. Linear acceleration implies a constant (linear) increase in velocity over time. You can linearly accelerate around a curve, for example. Great video, thanks.

[stonehead]

In this case, when we go in one direction, the inertia doesnt move the endolymph in the opposite direction like in the case of semicircular canals?

[shingweichew]

Thank you so much! So nicely taught, i am finally able to understand how the vestibule works after so long.

[saharmohammed]

Thank you so much! this topic couldn’t have been explained better.

[arhamshamsi]

Hi, Thank you very much for wonderful lecture, I just have one question, why there is increase firing rate of neurons in head extension movement ?

[cristinacutler]

Absolutely incredible!! Thank you so much for the extremely clear and precise explanations

[BassamN]

I cannot thank you enough, I’ve been struggling to understand this, but you made it crystal clear & that’s cuz you’re tremendously knowledgeable.

[salehujeem]

You didn’t explain why bending head to left side increase firing level while to right side decreased

[davidoconnor]

Thank you for a very helpful video. How is head movement during car acceleration or deceleration, called left and right linear acceleration ? Why is is not called forwards and backwards linear acceleration ?

[sinem]

So helpful! Repetitions are great. Thanks a lot for making these videos available to public.

[granthagen]

If utricle transduces left/right acceleration and saccule transduces up/down acceleration, what transduces front/back acceleration (as in your car driver example)? Or does the utricle transduce all horizontal acceleration including front/back?

[sheikhfaisal]

Respected Sir, I had have some hearing issues. Anyone attention to me In first time. I can't understand that word in first time spoke. Even When They repeat again that word. Also upper neck Pain with shoulder every day off. What kind of problems. Kindly advise

[furryglen]

In your example, head extension causes hair cells to shift posteriorly. This results in increased nerve firing. In the case of linear acceleration, hair cells of passenger in car would also shift posteriorly and nerve firing should also increase. Your example shows that nerve firing would decrease which doesn't make sense to me. Please explain. Thanks!

[alans]

The diagram "(D) Linear acceleration to the left" is a bit confusing. It it shows only the cilia deflected to the right with no deflection of the membrane or the otoliths. Surely it should show the otoliths and otolithic membrane deflected towards the right as well as the cilia.

[doctormaryanne.]

I do not understand what you mean by linear acceleration to the left. Please what does that mean ???