A 24-Year-Old Man Is Brought to the Emergency Department After

A 24-year-old man is brought to the emergency department after his head was hit with a bat during a baseball game. His teammates state that he was unresponsive after the incident but regained consciousness after 15 minutes. The patient initially refused to go to the hospital and sat on the bench for the remainder of the game. He initially appeared fine but became increasingly confused. He appears lethargic but opens his eyes to loud verbal commands. He is oriented to person and place. His temperature is 37.1°C (98.8°F) , pulse is 78/min, respiratory rate is 16/min, and blood pressure is 148/87 mm Hg. Examination shows an area of soft-tissue swelling over the left temporal region. The left pupil is mildly dilated.  Brain imaging would most likely reveal blood accumulating between which of the following tissues?

A) Aponeurosis and outer periosteum
B) Arachnoid mater and pia mater
C) Bone and dura mater
D) Dura mater and arachnoid mater
E) Pia mater and brain surface

Correct Answer:

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