Quiz 05/14/2022

A 52-year-old woman is brought to the emergency room in respiratory distress. She is accompanied by her husband who stated that they were eating at a high-end sushi restaurant when his wife started to complain of perioral numbness and tingling. Two hours later she started to complain of generalized weakness and trouble breathing. Accidental poisoning is suspected. Based on the available information, what is the mechanism of action of the poison ingested?

A 15-year-old boy with a past medical history of ADHD presents with odd behaviors including shrugging his shoulders and blinking frequently. His mother also states that he used to have some similar movements when he was younger, but they seem to have worsened since starting a new medication for his ADHD. Which of the following medications is most likely responsible for his symptoms?

A 50-year-old male farmer presents to the emergency department with diarrhea, steatorrhea, weight loss, abdominal pain, and joint pain in his shoulders and hips. He also displays constant rhythmic eye movements and repetitive facial muscle contractions. Intestinal biopsy reveals macrophage inclusions that positively stain with periodic acid-Schiff. What is the most likely etiology of this patient’s presentation?

Congenital muscular dystrophies are most often associated with which of the following pathophysiologies?

This muscle biopsy is most consistent with which myopathic disease?

A 30-year-old female with a past medical history significant for acne, migraine without aura, and depression presents to the emergency room with severe recurrent headaches. She says the headaches come on quickly and only last a couple of minutes but are debilitating. CTH was normal. A CTA head and neck was performed which showed segmental artery narrowing in the proximal MCA territory. Which of the following medications was the most likely trigger of this patient’s presentation?

Which of the following cranial nerves is most likely to be affected by increased intracranial pressure?

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

Which of the following is the mechanism of action for aducanumab?

Uncal herniation compressing on the structure marked below (black arrow) would lead to which of the following symptoms?

Which of the following muscles is innervated by the vagus nerve (CN X)?

A pediatric neurology consult was placed for a 5-day-old, full-term newborn with macrocephaly. When formally measured his head circumference was 46 cm. A tense fontanelle was appreciated on examination. A bedside ultrasound was performed and the only abnormality appreciated was significant hydrocephalus. What is the most likely etiology of the patient’s symptoms?

A 24-year-old woman presents to the ER with a one-day history of diplopia. On examination, the patient has right internuclear ophthalmoplegia. On further discussion, she describes an episode of left lower extremity numbness about 2 years ago that resolved after a few weeks on its own. An MRI of her brain and spinal cord was ordered. Findings included a T2 hyperintense contrast-enhancing lesion in the pons, as well as non-contrast enhancing T2 hyperintense lesions in periventricular and juxtacortical regions as well as in the thoracic spinal cord. What is the next step to confirm her diagnosis?

A patient with a history of a chronic ischemic stroke has an MRI performed for new-onset seizures. Based on the imaging provided, what is the likely etiology of the patient’s past stroke?

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