Question

The _____ coordinates the movement of the voluntary muscles?

Answer 1

Voluntary muscles are also known as skeletal muscle or striped or striated muscles. These muscles are attached to the skeletal component of the body. There are alternate light and dark bands observed on the muscle fibres under the microscope.

Complete answer:
The cerebellum coordinates the movement of the voluntary muscles. Cerebellum is the second largest part of the brain after the cerebrum. The cerebellum is also made up of two cerebellar hemispheres and a vermis. It has gray matter on the outer side and white matter on the inner side. The cerebellum has its gray matter on the outside, consisting of three layers of cells and fibres. The middle layer contains large flask shaped purkinje cells. The white matter and gray matter form arbor vitae. Central portion of the cerebellum has a worm-like appearance known as vermis.
The cerebellum does not initiate the movement of the body but reorganizes the motor commands. Cerebellum coordinates the locomotor activity in the body. The cerebellum is vital for controlling the rapid muscular activities such as running, typing, flying etc. All the activities of the cerebellum are involuntary but may involve learning in early stages.

Note: Birds are capable of moving swiftly and accurately in all three dimensions of space whereas humans spend all their lives moving on flat surfaces. This is because the cerebellum in birds is relatively larger than in humans.