They contract
Somatic
intrinsic eye muscles are controlled by the autonomic nervous system
It is the somatic nervous system that transmits information to voluntary muscles. The autonomic nervous system transmits information to involuntary muscles.
The nervous system controls muscles and glands by electrical impulses.
Voluntary muscles are controlled by the central nervous system.
The Central nervous systme sends impulses to the peripheral nervous system which in turn carries signals to the muscles.
The effectors of the nervous system are muscles and glands. They respond to nervous stimuli.
Skeletal muscles are controlled by motor neurons in the somatic branch of the peripheral nervous system, which is controlled by the central nervous system.
When muscles contract, the brain sends signals through the nervous system to the motor neuron that supplies several muscle fibers. There are different versions of contraction, which includes voluntary and involuntary.
The nervous system which also interprets information from sensory units
Somatic nerves from the somatic nervous system
Some muscles (skeletal muscles) will not contract unless stimulated by neurons; other muscles (smooth & cardiac) will contract without nervous stimulation but their contraction can be influenced by the nervous system. Thus, the nervous and muscle systems are closely interconnected.