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A 30-year-old male presents to the clinic with a fifteen-year history of progressive weakness and sensory loss in his lower extremities. Examination shows hammertoes, high arches on his feet, 4/5 ankle dorsiflexion strength, and a mild decrease in sensation to pinprick in the 1st toes bilaterally. Upon questioning he mentions that his father had similar-looking feet and started to use a cane in his fifties. What is the most likely diagnosis for his symptoms?
A 78-year-old patient with a history of multiple system atrophy (MSA) presents to your clinic for falls. The patient states that while standing he initially experiences feelings of lightheadedness and tunnel vision before a loss of consciousness. While on the ground he will be “twitching” for 30 seconds before he regains consciousness. Which of the following tests is the most likely to be diagnostic in this case?
Which of the following is NOT known to cause a drug-induced tremor?
A 50-year-old male is admitted for 3 months of progressive memory loss, visual hallucinations, and myoclonus. Examination revealed myoclonic jerks. Which of the following tests is the most specific for this disease?
You are reading a visual evoked potential (VEP) that has a prolonged P100 latency in the right eye and a normal latency in the left eye. Of the following, which pathology is most consistent with this study?
What is the pathophysiology of the lesion provided below?
Brain metastases are most likely to have arisen from which primary source?
Nursing staff in the neonatal intensive care unit noticed that a 32-week gestational age newborn with a complicated delivery and low initial Apgar scores and intracranial hemorrhage developed abnormal movements on the 2nd day of life. The movements were described as rhythmic, high-frequency movements of the left limb. There were no associated autonomic changes appreciated with events. The child was placed on continuous EEG recording and an event was captured which had no EEG correlate. What is the most likely diagnosis?
A lesion to which of the following neuroanatomical structures causes dysphagia, decreased gag reflex, and hoarseness?
A 49-year-old woman with recurrent episodes of vertigo and has an MRI brain performed at the request of her neurologist. Imaging reveals a well-circumscribed dural-based homogenous contrast-enhancing lesion. What is the most likely etiology of the lesion outlined above?