Motor nerve

From ArticleWorld

Motor nerves, a class of efferent nerves, allow the brain to stimulate muscle contraction.

Functions

Motor nerves are in direct relation with the other components of the nervous system and are required for normal body functions. They transmit (and cause) both voluntary and involuntary muscle contraction and relaxation. Motor nerves may sometimes cease their function through the process of deinnervation, but reinnervation normally occurs spontaneously.

Motor nerves are an integral and important part of the somatic nervous system. Any lack of response from a motor nerve may indicate a neural dysfunction and should be immediately followed by clinical investigation. Since they transmit commands that determine involuntary contractions, even a lack of unconscious reaction should be treated with great care because it may announce a more serious affection.

Affections

Affections of motor nerves are often associated with other, broader-level affections like those determined by gelsemium. Symptoms include aching and tiredness of the muscles, and paralysis of eyes, throat larynx or other vulnerable muscular systems. Tremor or twitching of muscles is not uncommon either.

More serious affections will cause paralysis of entire muscular systems and may impair reinnervation of the degrading nerve, requiring artificial reinnervation.