Congenital rubella infection

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Congenital rubella infection

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jean robert
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05/10/08 - 11:56 AM

A 6 months old boy presents to the pedriatrician with congenital hearing loss that the physician determines is the result of the mother s contracting a rubella infetion in the 8th week of her pregnancy. Which of the following is the embryonic origin of the hearing structure that is damaged by congenital rubella infection?

a) Auricular hillocks

b) 1st pharyngeal (brachial ) arch

c) Optic Cup

d) Saccular portion of the otic vesicle

e) Second pharyngeal (brachial) arch

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silver
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05/10/08 - 12:14 PM

totally guessing......................D ??

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GoodGirl
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05/10/08 - 09:02 PM

congenital rubella = deafness = demage to organ of corti a.k.a cochlear duct, developed from saccular portion. Answer is d,

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Tiff
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05/12/08 - 07:44 AM

Embryo isn't my thing but I think it's one of the phayngeal arches. At about 8 weeks incus & malleus is developed which is component of Arch 1. So i'm going with B

sigh
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05/12/08 - 03:45 PM

D.
Damage to cochlear duct - its collapse due to luck of endolymp + immune complexes damage involved...
My family member did some kind of study on this topic...just borrowed knowledge from him 2 minutes ago...

jean robert
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05/12/08 - 08:03 PM

GoodGirl wrote:
congenital rubella = deafness = demage to organ of corti a.k.a cochlear duct, developed from saccular portion. Answer is d,

Good explanation.

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jean robert
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05/12/08 - 08:03 PM

well done, guys.

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