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A 65-year-old man presents to the emergency room with progressive weakness over the course of several months. Examination shows pure motor weakness with no sensory involvement, decreased reflexes, and diffuse fasciculations. An EMG shows a conduction block of motor neurons outside of compression sites and normal sensory conduction velocities. Which of the following of most appropriate for treatment?
Which of the following features on EMG is suggestive of chronic denervation?
A 17-year-old woman with no significant past medical history except for an upper respiratory tract infection 2 weeks ago presents with a one-day history of fever, headache, and altered mental status. On examination, the patient also had right-sided ataxia. An MRI brain was ordered and T2 sequence images are shown below. The lesions showed minimal lesional enhancement with contrast administration (image not shown). What is the most likely diagnosis?
A 21-year-old male with a history of cirrhosis, dysarthria, and personality changes was brought to the emergency room after experiencing a 20-minute episode of right-sided weakness. An MRI was performed to evaluate for a possible stroke. An axial cut of a FLAIR sequence is provided below. What is the likely diagnosis of the patient’s chronic illness?
A 33-year-old woman with a past medical history of depression is brought to the clinic by her husband because of atypical behavior. For the past three weeks, her thoughts have become progressively more disorganized. She is also having auditory hallucinations. Similar behavior has been seen intermittently over the past five years. Despite having a history of depression, her husband says the depression has been well controlled for the last three months. Which of the following is the most likely diagnosis?
What is the anatomical structure marked by the blue arrow?
A 32-year-old female who is currently 39 weeks pregnant was brought to the emergency room after experiencing a first-time seizure. Neurological examination is non-focal except for mild somnolence and decreased visual acuity in both eyes. Vitals signs were normal except for a blood pressure of 192/104 mmHg. An MRI was performed and shown below. Which of the following is the most appropriate step in management?
Which of the following structures has an intact blood-brain barrier?
Which synapsed of the peripheral nervous system is acetylcholine the primary neurotransmitter?
Based on the histopathologic findings shown below, how long ago did this patient experience an ischemic stroke?