The Pre-Motor Area (PMA) provides a physical response to visual stimuli. This involves movements and body postures. This area is found immediately adjacent to the SMA.
The PMA is involved in movement in response to external visual stimuli. To begin with, this brain area is responsible for controlling muscles close to the brain. In addition, this area specializes in the adoption of a new body position.
Together with the SMA, this brain area is responsible for executing movements. So it is about controlling muscles in the right order. This sequence of muscle movements constitutes a premeditated, intentional action.
Damage to this area complicates the motor response to visual stimuli. Patients with such damage can see well and recognize objects and situations. Thus, they can respond to a stimulus, and they can perform all movements as usual. They just can't perform the movement properly in response to the visual stimulus.
Author: Myrthe Princen (translated by Melanie Smekal)
Image: Marcel Loeffen