If the motor area of the cerebrum on the left side is damaged, which side of the body will primarily be affected?

If the motor area of the cerebrum on the left side is damaged, which side of the body will primarily be affected?

• A. The left side of the body
• B. The right side of the body
• C. Both sides equally
• D. None of the body

Answer: (B)

The correct answer is that the right side of the body will primarily be affected if the motor area of the cerebrum on the left side is damaged. This phenomenon is due to the concept of contralateral control in the nervous system, where each hemisphere of the brain primarily controls movements and sensations on the opposite side of the body. In the case of the motor area, which is located in the frontal lobe of the brain, the left hemisphere is responsible for voluntary motor functions of the right side of the body. Damage to the left motor cortex can result in weakness or paralysis of the muscles on the right side, demonstrating this contralateral relationship. Understanding this concept is crucial in neurology and anatomy as it underscores the functional organization of the brain and its direct impact on bodily functions.

The correct answer is that the right side of the body will primarily be affected if the motor area of the cerebrum on the left side is damaged. This phenomenon is due to the concept of contralateral control in the nervous system, where each hemisphere of the brain primarily controls movements and sensations on the opposite side of the body.

In the case of the motor area, which is located in the frontal lobe of the brain, the left hemisphere is responsible for voluntary motor functions of the right side of the body. Damage to the left motor cortex can result in weakness or paralysis of the muscles on the right side, demonstrating this contralateral relationship. Understanding this concept is crucial in neurology and anatomy as it underscores the functional organization of the brain and its direct impact on bodily functions.