NBME Answers : helen's page

Comments ...

+0 visit this page (nbme16#26)

get full access to all content ⋅ become a member

I chose G. How do you know it's corticospinal tract deficit? Why the deficit not in the ventral horn? somebody plz explain.

get full access to all content ⋅ become a member

neurotic999 That is a good doubt. The thought process probably should be that since both upper and lower extremities are involved the lesion is higher up (section of spinal chord also seems to be cervical). If it was the ventral horn area, the paralysis would probably be limited to a smaller area supplied by the nerve. However, CST lesion makes it more likely to have a more widespread area of affection. I think! +1

neurotic999 Also, G & H most likely are to be indicating the AST. Ventral horn would be within the gray matter. +1