A young man is brought to the trauma unit after being struck…

A young man is brought to the trauma unit after being struck on the side of the head. He briefly lost consciousness, regained it, and then rapidly deteriorated. CT reveals a lens-shaped (biconvex) hematoma. Which meningeal layer and space are involved in this condition?

A 45-year-old patient presents with a fracture involving the…

A 45-year-old patient presents with a fracture involving the cribriform plate, leading to cerebrospinal fluid rhinorrhea. The physician is concerned about potential intracranial infection due to the open communication between the nasal cavity and the cranial vault. This structure is located in which cranial fossa and part of which bone?

A 45-year-old woman presents with sudden weakness on the rig…

A 45-year-old woman presents with sudden weakness on the right side of her face. She is unable to close her right eye or smile on that side. She also reports increased sensitivity to sound in her right ear. Examination confirms facial droop involving both the forehead and lower face on the right side. Which cranial nerve is most likely affected?