Question

Groups of motor fibers involved in fine coordination make up the

A. leptomeninges
B. reticular activating system
C. blood-brain barrier
D. pyramidal tracts
E. circle of Willis

Answer 1

The pyramidal tracts are the groups of motor fibers involved in fine coordination.

Step-by-step explanation:

The fine coordination of motor fibers is primarily carried out by the pyramidal tracts. Also known as the corticospinal tracts, these groups of motor fibers originate in the motor cortex of the brain and descend through the brainstem to the spinal cord.

The pyramidal tracts play a crucial role in voluntary motor control and are responsible for the execution of precise, skilled movements. They are involved in activities such as writing, playing a musical instrument, and tying shoelaces.