Different muscles in the body have different amounts of primary motor cortex devoted to controlling them with some having large areas and other having small areas.

Question

Quizplus · Accepted Answer

This statement is true. The primary motor cortex is responsible for controlling voluntary movements in the body and the amount of cortex dedicated to controlling a particular muscle group is proportional to the complexity and fine control required for that muscle group. For example, the fingers and tongue have large areas of primary motor cortex dedicated to them, while the trunk and limbs have fewer dedicated areas.

Different Muscles in the Body Have Different Amounts of Primary