Review Question - QID 109432

A 67-year-old man is brought to the emergency department by his wife due to dizziness, trouble with walking, and progressively worsening headache. These symptoms began approximately two hours prior to arriving to the hospital and were associated with nausea and one episode of vomiting. Medical history is significant for hypertension, hypercholesterolemia, and type II diabetes mellitus, which is managed with lisinopril, atorvastatin, and metformin. His temperature is 99°F (37.2°C), blood pressure is 182/106 mmHg, pulse is 102/min, and respirations are 20/min. On physical examination, the patient has right-sided dysmetria on finger-to-nose testing and right-sided dysrhythmia on rapid finger tapping. This patient's abnormal physical exam findings is best explained by decreased neuronal input into which of the following nuclei?