Answer to Stealing a ‘Beisbol’
Correct answer is E. The scenario described in the question represents what is likely to occur following a concussion. Specifically, the left middle meningeal artery was injured by the swing of the bat. The catcher is able to initially “shake off” the injury, but in time the damaged middle meningeal artery continues to leak and builds up pressure between the dura mater and the cranium. Compression of the brain begins to occur in a few hours after the injury as the blood mass increases. Treatment for such injury requires draining of the blood and ensuring the damaged blood vessels are occluded. Important in reaching a correct answer is the ability to recognize the left side of the base of the skull. The blow was landed to the left side of the catcher, and it was the left middle meningeal artery that most likely suffered the injury.
The foramen spinosum is discussed in lecture 3 of the Head and Neck lecture series.
Answer to this question is based on material presented in lectures 3 of the Head and Neck Lecture Series.
= Pterygopalatine fossa
= External acoustic meatus
= R. foramen spinosum
= L. foramen lacerum
= L. foramen spinosum