A 62-year-old female develops difficulty swallowing, hoarsen…

A 62-year-old female develops difficulty swallowing, hoarseness, and loss of the gag reflex after brainstem surgery near the pons-medulla junction. She also shows loss of taste in the posterior third of the tongue and impaired soft palate movement. These findings suggest involvement of multiple cranial nerves arising from the brainstem. Question:How many pairs of cranial nerves originate from the brain and brainstem?

67-year-old man develops unsteady walking, overshooting move…

67-year-old man develops unsteady walking, overshooting movements, and slurred speech after a minor stroke. Imaging shows damage to a posterior brain region, while cognition remains intact. The symptoms suggest impaired coordination rather than muscle weakness. Question:Based on the information provided, which of the following best explains the role of the affected brain region and the symptoms observed?