Neuro 1 USMLE Flashcards
decreased pain and temp sensation over lat. aspects of both arms. where is the lesion
syringomyelia
penlight in pts right eye produces bilateral pupillary constriction. when moved to the left eye, there is paradoxical dilation.
what is the defect?
atrophy of L optic nn
decresassed prick sensation on lateral aspect of leg and foot.
deficit in what mm action can also be expected
dorsiflexion & eversion of foot (common peronial nn)
pt presents w/ tingling over lateral digits of her R hand.
What is the dx
carpal tunnel syndrome.
median nn compression
decreased plantar flexion and decreased sensation over back fo thigh, calf, and latereal half of foot.
what spinal nn
tibial (L4-S3)
pt in MVA can’t turn head to L & has rightt shoulder droop.
What sx is damaged.
R CN XI (inn SCL & trap mm)
pt presents w/ one wild flailing arm. where is the lesion?
contralateral subthalamic nuccleus (hemiballismus)
pt w/ cortical lesion does not know he has a dz. where is the lesion?
right paraietal lobe
pt cannot protrude tongue toward L side and has a R-sided spastic paralysis. Where is the lesion?
L medulla, CN XII
teen falls while rollarblading and hurts his elbow. He can’t feel the medial part of his palm.
What is the nn & what is the injury.
ulnar nn due to broken medial condyle
pt presents to ER after falling on arm. X-ray shows midshaft break of the humerus? Which nn & aa are most lkely damaged?
radial nn & deep brachial aa (run together
pt cannot blink his R eye or seal his lips and has mild ptosis on R side. What is the dx and which nn is affected.
bell’s palsy; CN VII
pt c/o numbness, & tingling sensation. She has wasting of thenar eminence. What is the dx/ What nn is affected?
carpel tunnel syndrome (medial nn)
stage of sleep where there is variable BP, penile tumescence & variable EEG.
REM
person demands only the best & most famous doctor in town.
what personality d/o
narcissistic personality d/o
nurse has episodes of hypoglycemia; blood analysis shows no elevation in C protien. What is the dx.
factitious d/o. self scripted insulin
woman presents w/ headache, visual disturbance, galactorrhea and amenorrhea
what is the dx
prolactinoma
pt experiences dizziness & tinnitis. ct shows enlarged internal acoustic meatus. What is the dx
schannoma
25 y/o female presents w/ sudden uniocular vision loss & slightly slurred speech. She has hx of weekness & parasthesias that have resoved. what is the dx
MS
10 y/o child “spaces out” in class (e.g., stops talking midsentance & then continues as if nothing happened. During spells there is slight quivering of lips. Dx?
absence seizures
man on several meds including antidepressants and antihypertensives, has mydriasis and becomes constipated. What is the cause of his symptoms
TCA
woman on MAO inhibitor has hypertensive crisis after a meal. What did she ingest?
tyramine (wine or cheese)
This CNS support cell helps maintain the blood-brain barrier. It’s cell marker is GFAP
astrocyte
this CNS support cell makes up the inner lining of the ventricles
ependymal cells