Brainstem — Cross-Sections

A 58-year-old man from Delhi presents with acute onset vertigo, nausea, and vomiting. On examination, he has nystagmus (beating towards the lesion), ipsilateral facial numbness, ipsilateral loss of pain and temperature sensation over the face, contralateral loss of pain and temperature sensation over the body, and ipsilateral Horner syndrome (miosis, ptosis, anhidrosis). MRI brain shows an acute infarct in the lateral medulla. Which of the following structures is most likely damaged in this syndrome?

At the level of the midbrain, which of the following structures is located in the ventral tegmentum immediately dorsal to the substantia nigra?

Which single clinical finding best distinguishes Weber syndrome from Benedikt syndrome?

During a brainstem anatomy dissection, a medical student identifies the most common site of lesion in pontine infarction. Which of the following is the most common vascular territory affected in pontine stroke?

A 58-year-old man from Delhi presents to the emergency department with acute onset of vertigo, nystagmus, and ipsilateral facial numbness. On examination, he has ipsilateral loss of pain and temperature sensation over the face, contralateral loss of pain and temperature sensation over the body, and ipsilateral Horner syndrome. MRI brain shows an acute infarct in the lateral medulla. What is the most appropriate next step in management?