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?

Question

Quizplus · Accepted Answer

The motor cortex is responsible for voluntary movements of the body, including the arms. Paralysis of the left arm suggests that the injury occurred in the part of the motor cortex that controls movement of the right arm (because the motor cortex is crossed-wired, controlling movement of the opposite side of the body).

Answer: C 
 The somatosensory cortex is responsible for processing sensory information from different parts of the body, including touch, pressure, temperature, and pain. It is unlikely that damage to this area alone would cause paralysis of the left arm, as that is a motor deficit rather than a sensory one.

Answer: A 
 The auditory association area is responsible for processing auditory information and interpreting sounds. Damage to this area would likely result in hearing problems, but not paralysis of the left arm.

Answer: D 
 Broca's area is responsible for language production and is located in the left hemisphere of the brain in most people. Damage to this area would result in difficulty speaking, but not paralysis of the left arm.

Marta Was in an Automobile Accident and Suffered an Injury