Embryology of the Ear I (Easy to Understand)

The development of the inner ear explained in 15 minutes.
For the embryology of the middle and outer ear, tap here: • Embryology of the Ear ...
If you are completely new to embryology and you want to understand it quickly, this should be the first video you watch:
• Introduction to Embryo...
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SUMMARY OF THE VIDEO FOR YOUR NOTES
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The internal ear
The otic placode is seen in the day 22 embryo as a thickened part of the ectoderm on both sides of the rhombencephalon (developing CNS / neural tube).
the otic placode invaginates quickly forming the otic vesicles. Also known as auditory vesicles, or otocysts.
the otic placode divides itself into both a ventral component and a dorsal component
the ventral part gives rise to the saccule and the cochlear duct
the dorsal part forms the utricle, semicircular canals, and endolymphatic duct.
these are collectively the membraneous labyrinth
by week 6, the saccule has an outgrowth that eventually forms the cochlear duct by growing and coiling 2.5 times around itself. It grows into the surrounding tissue to do this.
the connection between the saccule and the cochlear duct is by the ductus reuniens
the tissue that the cochlear duct penetrated will differentiate into cartilage
some of this cartilage will become hollow, to allow for the development of the scala vestibuli and tympani, each having their own membrane.
cochlear duct is attached to the rest of the cartilage by the spiral ligament
epithelial cells of the cochlear duct differentiate
these become the outer ridge and the inner ridge
the outer ridge becomes the hair cells which are covered by the tectorial membrane
the inner ridge becomes the spiral limbus
the hair cells and the tectorial membrane are known as the Organ of Corti
the Organ of Corti sends impulses to the brain via cranial verve VIII (CN8, vestibulocochlear nerve)
by week 6 semicircular canals appear by walls that grow together
the walls disappear leaving the three semicircular canals
one of the ends become the crus ampullare that dilates and contains sensory cells, the other end doesn't dilate and is thus called the crus nonampullare
the cells in the crus amopullare are known as the crista ampullaris and these maintain equilibrium
inside the utricle and saccule , maculae acusticae develop, which send information about the bodies position in space to the brain for processing - this is done via the vestibular portion of CNVIII
the statoacoustic ganglion is formed by both neural crest cells and by some cells that divide off the optic placode (so all ectoderm)
the statoacoustic ganglion divides into both vestibular and cochlear segments (CNVIII)

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[@sonja_nb]

Best embryology teacher ever!! Thank you so much

[@katemackenzie3030]

If you aren't already a highly distinguished professor, I swear!! Thank you so much for this video. Was very confused by my many audiology textbooks and this put all the pieces together for me. Hats off to your hand drawn diagrams too :D

[@minass]

Thanks for watching. Nowhere near a professor though 😂

[@ezaegubethel9128]

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[@minass]

You champion. Thanks for watching

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[@minass]

Thank you so much 😀

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Thank you very much Dr. Minass, you are a savior ❤

[@BigLed]

Such great content, thank you so much for the indepth. This will make me more competent with my exams!
You deserve more views!

[@minass]

You'll be even more competent with part 2 coming soon 😊

[@umehabiba6998]

You make embryology so easyyy. thankyou so much

[@daylighttalks1551]

Very good concept
What about development of bony labirynth

[@dr_medico]

Bestest teacher of embryo

[@minass]

Thank you techno gamer

[@muhammadibrahimsulaiman4262]

Thanks
Lectures on General Embryology will be appreciated

[@minass]

Will do

[@muhammadibrahimsulaiman4262]

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[@caromueni2838]

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[@abrartarig739]

Please make more play list
For example
A playlist for special senses
Another for git ...etc
Thank you
Clear explanation ❤

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Thank you

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[@minass]

I'm happy you found it too!

[@korinomiko]

Nice video, just finished my binge watch :D! I'd be happy if you could explain the development of the vascular system and maybe make a video about the somites!

[@minass]

I’ll do that after the ear to fuel the binge 👌🏼

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Thankyou Dr. Minass

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Thank you so much, You're a gem!

[@minass]

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[@ddk145]

Superb explanation of inner ear embryology!

[@minass]

Thank you!

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Great explaining!❤

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thank you very much

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[@minass]

Glad it was helpful!

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Thank you for this

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Helpt me a lot, thank's!

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Wonderful lecture !

[@minass]

Thanks 😊

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God bless you,dr

[@minass]

Thank you, you too

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Thank you so much sir I watch your videos for embryology and I always a get clear picture of the related topic. I want you to keep this good work sir. Again Thank you soooooooooooo much sir

[@MEDDENStudents]

great videos

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Thank you

[@minass]

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Wonderful video ❤️😩

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Thank you 😊

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You're welcome 😊

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Learning from PNG Solomon Islands.

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[@minass]

😊

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[@KMo-o7u]

Thank you very much Dr. Minass, you are a savior ❤