Question 1

Question

An axial MRI section through the brainstem is shown at the level indicated by the label 'caudal pons.' A 67-year-old man with hypertension presents with acute-onset left facial weakness involving the upper and lower face, left lateral gaze palsy, and right-sided limb weakness with an extensor plantar response on the right. The lesion responsible for all of these findings is most likely located in which region of the image?

Accepted Answer

Left tegmentum of the caudal pons, near the facial colliculus, with ventral extension into the basis pontis

Answer

Right tegmentum of the caudal pons, medial to the medial lemniscus

Answer

Right basis pontis, involving the corticospinal fibres only

Answer

Left tegmentum of the lower midbrain, near the red nucleus

Answer

Left medullary tegmentum, near the inferior olivary nucleus

Gross Anatomy — MCQs

Gross Anatomy — MCQs

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