need help with your account or subscription? click here to email us (or see the contact page)
join telegramNEW! discord
jump to exam page:
search for anything ⋅ score predictor (โ€œpredict me!โ€)

NBME 18 Answers

nbme18/Block 2/Question#29 (reveal difficulty score)
32 yo woman, new neurologic finding; imaging ...
Inability to abduct the eye ๐Ÿ” / ๐Ÿ“บ / ๐ŸŒณ / ๐Ÿ“–

 Login (or register) to see more

 +3  upvote downvote
submitted by โˆ—wishmewell(59)
get full access to all contentpick a username

They are describing cavernous sinus syndrome (FA 2018 page 526) CN VI is the most susceptible to injury! CN VI is needed to abduct the eye. these patients have cavernous sinus thrombosis related to the infection, carotid cavernous fistulas, occasinally decreased maxillary sensation. decreased corneal sensation, horner syndrome.

get full access to all contentpick a username
baja_blast  FA 2019 p. 530 +

 +3  upvote downvote
submitted by โˆ—thisshouldbefree(51)
get full access to all contentpick a username

cavernous sinus = CN 3,4, V1, V2, 6 CN 3,4, V1, V2 - go from top to bottom then CN 6 is in the middle of the diagram we are usually shown

get full access to all contentpick a username

 +0  upvote downvote
submitted by โˆ—an1(114)
get full access to all contentpick a username

The cavernous sinus contains CN 3,4,V1,V2, and 6 (right next to the ICA).

A: MCA defect (face and upper limb)

B: olfactory (recall that this is the only sense spared in thalamic strokes)

C: damage to macula, could be an MCA defect?

D: MCA; supplies parental and temporal(total HH, macula NOT spared), PCA; supplies occipital and some of temporal (total HH, macula spared) - mentioned pareital and temporal because of the quadrantonopis; 2 quads = 1 hemianopsia

E: LR (recall LR6, SO4)

get full access to all contentpick a username

Must-See Comments from nbme18

feliperamirez on He is medically qualified to drive
anechakfspb on Tubular atrophy
aneurysmclip on Endothelial nitric oxide synthase production
azibird on 24,25-Dihydroxycholecalciferol
famylife on Increased transcription of HMG-CoA reductase
match95 on Plasmid loss
apurva on Antineoplastic
cbreland on Basement Membranes
match95 on Proximal tubule: isotonic; Macula densa: ...
sugaplum on Abnormal migration of endoderm from the ...
amirmullick3 on Myelofibrosis
merpaperple on Primary spermatocyte
wishmewell on Alpha-synuclein
namira on Greening reaction on blood agar

search for anything NEW!