Suppose a head-injured patient could finger tap 67 times in ten seconds with the left hand, but only 27 times in ten seconds with the right hand. In which cerebral hemisphere might you suspect a lesion?

Question

Quizplus · Accepted Answer

The motor areas controlling the right side of the body are located in the left cerebral hemisphere, and vice versa. Therefore, a significant discrepancy in motor function between the two hands, such as the one described, suggests a lesion in the hemisphere opposite the weaker or less coordinated hand. In this case, the right hand's reduced ability to finger tap suggests a lesion in the left cerebral hemisphere.

Suppose a Head-Injured Patient Could Finger Tap 67 Times in Ten