system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
A 66-year-old woman is brought to the emergency department 4 hours after falling and hitting her head while skiing. Initially, she refused treatment, but an hour ago she began to develop a severe headache, nausea, and right leg weakness. She has osteopenia. Her only medication is a daily multivitamin. She has no visual changes and is oriented to person, time, and place. Her temperature is 37.2°C (99°F), pulse is 72/min, respirations are 18/min and regular, and blood pressure is 128/75 mm Hg. Examination shows a 5-cm bruise on the left side of her skull. The pupils are equal, round, and reactive to light and accommodation. Muscle strength is 0/5 in her right knee and foot. Which of the following is the most likely cause of this patient's symptoms?
assistant
Subfalcine herniation