Which parts of the body have the greatest representation on the primary motor cortex?
A) hand and facial muscles
B) leg and arm muscles
C) head and neck muscles
D) chest and back muscles

Question

Quizplus · Accepted Answer

The hand and facial muscles have the greatest representation on the primary motor cortex, as they require fine motor control and are involved in many complex movements. This is reflected in the amount of cortical space dedicated to these areas, which is much greater than that devoted to the leg and arm muscles, head and neck muscles, or chest and back muscles.

Which Parts of the Body Have the Greatest Representation on the Primary