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...
--------------------------------
Recommended Text
--------------------------------
Easy Embryology is a book that is dedicated to the simplification of embryology. It is available at drminass.com/product/easyembr.... Contact Dr. Minass for more information.
----------------------------------------
Interact With Dr. Minass!
----------------------------------------
Website - www.drminass.com
Email - [e-mail]
Patreon - / drminass
Facebook - / m1na55
Instagram - @m1.nass
Post - Address to:
Minass
Parcel Locker 10106 04448
59 Penshurst Street
Willoughby, NSW
Australia 2068
------------------------------------------------------------------------
SUMMARY OF THE VIDEO FOR YOUR NOTES
------------------------------------------------------------------------
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)

[@minass]

Easy Embryology (written by me) is the BEST textbook to use if you're infuriated with embryology. Get 20% off with code EASY20
Buy here -> drminass.com/product/easyembryology

[@sonja_nb]

Best embryology teacher ever!! Thank you so much

[@user-po9hk4ur9u]

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

[@samsarasoledad9453]

This is amazing. Thank you so much ❤️

[@naseeruddin477]

Great explaining!❤

[@caromueni2838]

Wow... Such a good lecture ... Thank you

[@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

[@mominaazhar5333]

You are a saviour tbh 😭😭 very well explained ! Hats off to you 👍

[@minass]

Thank you so much 😀

[@kydeee6749]

Thankyou Dr. Minass

[@dr_islombek]

I consider you as my teacher because I learnt a lot from you! We are your subscribers from Uzbekistan (central Asia) Your content is really useful for us

[@sefalipodder9009]

Big fan of your lectures sir

[@dante.88]

Thanks you really make the things easier

[@mediquoria]

Thank you for this

[@sietsepostma2790]

Helpt me a lot, thank's!

[@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 😂

[@Parkjungehn]

thank you very much

[@tinkerbell6672]

thank you so much for the easy explanations! so grateful i watch this :))

[@minass]

Glad it was helpful!

[@MEDDENStudents]

great videos

[@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 👌🏼

[@korinomiko]

@@minass thanks a lot! I really appreciate it!

[@ezaegubethel9128]

I can now go back to my handout with confidence, all thanks to you 😊

[@minass]

You champion. Thanks for watching

[@isatousawaneh2404]

Wonderful lecture !

[@minass]

Thanks 😊

[@megha111]

Thank you so much, You're a gem!

[@minass]

You are the gem for watching and subscribing 😝

[@muhammadibrahimsulaiman4262]

Thanks
Lectures on General Embryology will be appreciated

[@minass]

Will do

[@muhammadibrahimsulaiman4262]

@@minass ok sir

[@dr.abhilashajaiswal1937]

Thank you ☺️

[@ddk145]

Superb explanation of inner ear embryology!

[@minass]

Thank you!

[@daylighttalks1551]

Very good concept
What about development of bony labirynth

[@startingpointformedicose1731]

Thank you 😊

[@minass]

You're welcome 😊

[@nana-sr2bd]

Thank you

[@minass]

My pleasure thanks for watching :)

[@dr_medico]

Bestest teacher of embryo

[@minass]

Thank you techno gamer

[@sehrish.3103]

Hi, can you please do a video on adrenal gland development? I keep getting questions regarding endocrine system wrong...

[@pejomirpejic]

God bless you,dr

[@minass]

Thank you, you too

[@nadarajanniranjan4076]

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

[@justiceoghenekevwe863]

Wonderful video ❤️😩

[@minass]

Very much thank you

[@drnishantsinghentclinic]

Wow😊

[@minass]

😊

[@daniellekomasi1801]

Learning from PNG Solomon Islands.

[@balagopals2070]

yo doc. you're built

[@RimshaaKhaan]

the light reflection on board is disturbing 🥲🥲🥲

[@user-po9hk4ur9u]

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

[@user-po9hk4ur9u]

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