Quiz 07/20/2022 (7)

Which of the following is the mechanism of action of riluzole?

An 80-year-old female presents with abnormal eye movements and cognition. She has also been experiencing problems with gait and memory. An MRI of the brain revealed midbrain atrophy, with relative sparing of the other brainstem structures. Which of the following is the most likely diagnosis?

A patient with a history of a right shoulder anterior dislocation comes to the clinic with the chief complaint of right arm numbness. On examination, there is a loss of sensation to light touch on the lateral portion of the upper arm. Based on the sensory disturbance, which of the following nerves is most likely injured?

The electrical fields that generate the cortical activity appreciated on electroencephalogram (EEG) are the result of which of the following?

A 58-year-old male presents with a few months of progressive symptoms. He reports limb rigidity, left greater than right, as well as neck stiffness. On exam, you note bradykinesia and cervical dystonia. He does not have a tremor. Speech is hesitant, and there is evidence of speech apraxia. You also note that the patient has trouble controlling the location of his left hand in space, and he grabs for your stethoscope without realizing it.

What is the most likely diagnosis?