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Retired NBME 19 Answers

nbme19/Block 0/Question#0 (reveal difficulty score)
A 70-year-old man develops a progressive ...
Frontal lobe disinhibition 🔍 / 📺 / 🌳 / 📖
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submitted by blueberriesyum(28)
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A 70 year old develops a progressive disinhibition syndrome with episodes of emotional outbursts, inappropriate use of language, and socially inappropriate behavior. Where is the most likely damage?

Answer: Frontal lobe disinhibition.

Bilateral amygdala (medial temporal lobe) would've been affected if it was Kluver Bucy Syndrome.

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flapjacks  If you know the story of Phineas Gage, it can help +6
helppls  How do you tell the difference from a frontal lobe issue and Kluver Bucy Syndrome? +1
nikitasr27  I would say the emotional and language part. The frontal lobe is very involved in emotions and the limbic system as well as in complex language concepts. Kluver Bucy would lack these aspects as the individual is “indifferent” to everything (no fear, no emotions) just like my ex +3
randi  Kluver-bucy is also marked by specific behaviors like hyperphagia, hyperorality, hypersexuality. Apparently can also be associated with HSV-1 encephalitis FA2019 p499. +1
chaosawaits  What am I looking at? From what viewpoint am I looking? Can anyone identify the labels? I have A is olfactory tract, C/D are optic nerves, E/F are optic tracts, G/H are substantia nigra of midbrain & still I am totally lost. +1
chaosawaits  I imagine that we are viewing the front of the brain from underneath and slightly angled to expose the midbrain more easily. Obviously B is the frontal lobe. But what are I and J? +
an1  @chaosawaits I think J might be the partial lobe. the only thing confusing me is that B is the frontal lobe with the amygdala is actually in the temporal lobe... +
an1  I take that back, I thought it was Kluver body for a second but its just frontal lobe stuff lol +
pakimd  can anyone explain why this is kluver bucy and not frontotemporal dementia? +
doida  it is not kluver, it is frontal lobe dementia +
thatmd  I and J are the temporal lobes +



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