Nerve Definition Anatomy

It innervates the skin and fascia behind the ear on the lower part of the pinna of the ear and over the angle of the jaw. It consists of over one million nerve fibers.

Definition Of Optic Nerve

The fibrous portions of a nerve are covered by a sheath called myelin andor a membrane called neurilemma.

Nerve definition anatomy. Nerve in anatomy a glistening white cordlike bundle of fibres surrounded by a sheath that connects the nervous system with other parts of the body. A nerve is an enclosed cable like bundle of nerve fibres called axons in the peripheral nervous system. Nerve definition one or more bundles of fibers forming part of a system that conveys impulses of sensation motion etc between the brain or spinal cord and other parts of the body.

A nerve provides a common pathway for the electrochemical nerve impulses called action potentials that are transmitted along each of the axons to peripheral organs or in the case of sensory nerves from the periphery back to the central nervous system. The great auricular nerve is a sensory branch of the cervical plexus composed of axons from spinal cord segments c2c3. The job of the optic nerve is to transfer visual information from the retina to the vision centers of the brain via electrical impulses.

It is the second of several pairs of cranial nerves. The optic nerve is made of ganglionic cells or nerve cells. The nerves conduct impulses toward or away from the central nervous mechanism.

A bundle of fibers that uses electrical and chemical signals to transmit sensory and motor information from one body part to another. Any of three nerves the great auricular nerve the posterior auricular nerve or the auricular branch of the vagus nerve cn x.

Nerve Definition Facts Examples Britannica

Central Nervous System Structure Function And Diseases