Marta was in an automobile accident and suffered an injury to her brain, resulting in paralysis of her left arm. What part of Marta's brain was injured?
A) auditory association area
B) motor cortex
C) association areas
D) somatosensory cortex

Question

Marta was in an automobile accident and suffered an injury to her brain, resulting in paralysis of her left arm. What part of Marta's brain was injured?
A) auditory association area
B) motor cortex 
C) association areas
D) somatosensory cortex

Quizplus · Accepted Answer

The motor cortex is responsible for voluntary movement, and damage to this area can result in paralysis or weakness of the corresponding body part. Marta's paralysis of her left arm suggests that the injury occurred in the area of the motor cortex that controls movement of the right arm and hand, which is located in the left hemisphere of the brain.

Marta Was in an Automobile Accident and Suffered an Injury