Parallel bundles of axons and their associated neuroglial cells wrapped in several layers of connective tissue. Connect the CNS to sensory receptors, muscles, and glands in all parts of the body.
The spinal cord appears segmented because the spinal nerves emerge at regular intervals from the spinal cord throught the ________ ___________.
Covers nerve fibers; consists of a mesh of collagen fibers, fibroblasts, and macrophages surrounded by endoneurial fluid.
Outer connective tissue covering of a nerve; bundles all the fasciculi together to form a single nerve.
Emerge from the spinal cord in 2 or 3 irregular rows; contain axons of multipolar motor neurons arising from cell bodies in the anterior regions of the spinal cord gray matter.
Project from the posterolateral sulcus of the spinal cord; contain central processes the sensoty unipolar neurons.
The anterior and posterior ____ on each side of the spinal cord correspond to one developmental segment or level of the body.
Spinal Nerve Trunk
As the sensory posterior root and motor anterior root project laterally from the spinal cord, they converge to form a mixed nerve called the _____ _____ _____.
Ramus that serves the muscle and structures of the upper and lower limbs, and the muscles and skin of the lateral and anterior regions of the trunk.
Reenters the vertebral canal through the intervertebral foramen and supplies the vertebrae, vertebral ligaments, blood vessels of the spinal cord, and meninges.
Network of on left and right sides of body formed by axons joining with various numbers of axons from anterior rami of adjacent nerves.
Plexus that supplies the skin and muscles of the head, neck, and superior part of the shoulders and chest. Phrenic nerve arises here. Branches run parallel to the accessory and hypoglossal nerves.
Plexus that extends laterally on either side of C5-C8 and T1.Divided into roots, trunks, divisions, and cords. Associated with the axillary, musculocutaneous, radial, median, and ulnar nerves.
Plexus that supplies the anterolateral abdominal wall, external genitals, and part of the lower limbs.
Plexus that supplies the buttocks, perineum, and lower limbs. Associated with sciatic nerve.
Intercostal or Thoracic
Nerves known as segmental because they connect directly to the structures that supply the intercostal space.