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A 38 year-old female presents to her family physician with a complaint of blurry vision. Vitals were taken: HR 76, BP 110/64, RR 10, Temp. 98.6. Patient fails neuro exam. When asked to look right, the patient's right eye looks right while the patient's left eye cannot adduct. All other ocular movements are intact and neurologic tests were negative. A CT scan was performed and confirmed the physician's suspicion of multiple sclerosis. Where is the likely site of the lesion?
A. Left CN VI nucleus
B. Left medial longitudinal fasciculus (MLF)
C. Right CN III nucleus
D. Right CN VI nucleus
E. Right medial longitudinal fasciculus (MLF)
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b
MLF is the most commom involved site in MS.
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yes b MLF lesion is characteristic for MS and remember that it's responsible for the oculomotor/adduction part of the conjugate horizontal gaze
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EEEE ....
Pls give us the answer
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ITS B....................
guys this is very basic neuroanatomy, and i sincerely advise u to revise it (From kaplan)
horizontal conjugate gaze lets say to the right:
right abducens nucleus is stimulated which activates lateral rectus causing the right eye to abduct... at the same time a signal is transmitted to the left MLF which activates the oculomotor nucleus which activates the medial rectus of the left eye... refer to a book with some diagrams, i'm sure it will become clearer
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the answer is
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