brain cramp

[GiJoe]

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ok im sure this is obvious to many of you but I can't figure out what they mean by "the liver becomes a muscle" in Von Gierke's disease... (pg 161 FA). anyone know exactly what they're talking about?

 

[nuclearrabbit77]

they say this because muscle normally doesn't have glucose6phosphatase. muscle can mobilize glucose from glycogen stores but will never actually give glucose up from the cell to another organ, which would require phosphatase to let it get out.

 

[csmith1]

Von Gierke...the liver is Very Greedy with its glucose.

not too shabby if I do say so myself.....

 

[lindyloohoo]

thanks for that explanation nuclearrabbit. i was having trouble with that statement too. stupid review book, making me think...spoonfeed, spoonfeed!!! isn't that what I paid my money for?! 😛

 

[nuclearrabbit77]

hey i want to know if you guys think this is an error (which i think it is). pg. 170 HY gross anatomy. bottom of the page, it's describing an epidural trauma to the brain and sequelae. it says ...contralateral hemiparesis. shouldn't it be ipsilateral?

this is how i think it should go:

ipsilateral hemiparesis (due to corticospinal tract in the crus cerebri on the opposite side)
CN III deficits, ipsilateral (due to ipsilateral uncal herniation)
possible contralateral homonymous hemianopia (getting squeezed by ipsilateral uncal herniation)

thanks-

 

[NateatUC]

hey i want to know if you guys think this is an error (which i think it is). pg. 170 HY gross anatomy. bottom of the page, it's describing an epidural trauma to the brain and sequelae. it says ...contralateral hemiparesis. shouldn't it be ipsilateral?

this is how i think it should go:

ipsilateral hemiparesis (due to corticospinal tract in the crus cerebri on the opposite side)
CN III deficits, ipsilateral (due to ipsilateral uncal herniation)
possible contralateral homonymous hemianopia (getting squeezed by ipsilateral uncal herniation)

thanks-

The corticospinal tract decussates below the cerebral peduncles, in the pyramidal decussation in the caudal medulla to be exact. So... if you compress the corticospinal tract above the pyramidal decussation, you'll get a contralateral hemiparesis.

 

[GiJoe]

sweet! thank you

 

[QuothTheRaven]

it's a typo. contralateral compression of crus cerebri (before crossing) will lead to ipsilateral paresis. p. 107, first aid. p. 97, High yield neuro

 

[nuclearrabbit77]

another hy gross anatomy potential error/question.

loss of tensor tympani function will cause hypo or hyperacusis? in high yield gross anatomy it says hypoacusis--pg.180....in brs gross anatomy it says that it's function is to tighten the membrane in response to loud noises...reducing vibration. so essentially brs gross anatomy says that loss of function should be hyperacusis.
doing google searches came up with the same thing with tensor tympani having a similar role as the stapedius, by contracting the middle ear ossicles and decreasing transmission to the inner ear.

 

[nuclearrabbit77]

it's a typo. contralateral compression of crus cerebri (before crossing) will lead to ipsilateral paresis. p. 107, first aid. p. 97, High yield neuro

you know it, buddy.

 

[EMDrMoe]

ok im sure this is obvious to many of you but I can't figure out what they mean by "the liver becomes a muscle" in Von Gierke's disease... (pg 161 FA). anyone know exactly what they're talking about?

Thanks for asking! The "think about it" wasn't very nice of them 😛 ! Heck, I could think about it all day and still feel like Pinky from Pinky & the Brain - JUST TELL ME, this is not the time for FA to be cute, lol!

PS - Thanks for the explanation! I hit them again yesterday and I think I really understand those darn diseases for the first time ever! 😀

 

[nuclearrabbit77]

i have a behavioral/ethics question. pg. 218 BRS Behavioral.

it says that a competent pregnant woman has the right to refuse intervention (e.g. casearean) even if the fetus will die or be seriously injured without treatment.

is this true? i thought i heard of a recent case about something like this and i was wondering what you guys thought.