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d**u
发帖数: 278 | 1 An 8 year old boy is brought to the doctor by his parentsâ#8482; coz
of a 3 month hx of episodes of unusual behavior that interfere with his
performance at school. His teacher told the parents that he suddenly stops
what he is doing for a few seconds and states into space. The episodes start
and end abruptly. Physical and neuro exam shows no abnormalities. Which of
the following mechanisms is the most likely cause of these episodes?
A) Cortical inhibition of thalamic neurons
B) Decreased dopaminergic inputs to cortical neurons
C) Impaired activity of pontine neurons
D) Spreading depression of cortical neurons
E) Synchronized discharge of the thalamocortical neurons
Why the answer is E? where can I find it?
Thanks a lot! | c****e
发帖数: 188 | 2 The child has absence seizures, characterized by synchronized high
frequency neuronal firing.Therefore, E is the best answer. FA 2010, P423.
8482; coz
start
of
【在 d**u 的大作中提到】
: An 8 year old boy is brought to the doctor by his parentsâ#8482; coz
: of a 3 month hx of episodes of unusual behavior that interfere with his
: performance at school. His teacher told the parents that he suddenly stops
: what he is doing for a few seconds and states into space. The episodes start
: and end abruptly. Physical and neuro exam shows no abnormalities. Which of
: the following mechanisms is the most likely cause of these episodes?
: A) Cortical inhibition of thalamic neurons
: B) Decreased dopaminergic inputs to cortical neurons
: C) Impaired activity of pontine neurons
: D) Spreading depression of cortical neurons
| d**u
发帖数: 278 | |
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