The figure shows a map of the motor control area of the brain, found in the frontal lobe of the cerebrum. Why is such a large part of the brain responsible for controlling the actions of the hands and lips? Why is only a small part of the brain responsible for controlling the trunk?

Transcribed Image Text:

Frontal lobe- Thumb Fingers Hand Neck Brow Eye Face Lips Jaw Tongue Primary motor cortex Toes