Anatomy and Cell Biology 3319 Lecture Notes - Lecture 19: Cervical Plexus, Spinal Nerve, Dorsal Root Of Spinal Nerve
7 Nov 2016
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Spinal nerves and the brachial plexus lab 7 station 2. 31 pairs attaching to/coming off of the spinal cord. Contain motor fibers to, and sensory fibers from, most regions of the body. One more cervical spinal nerve than vertebrae. Three less coccygeal spinal nerves than vertebrae. * spinal nerves exit the spinal cord through the intervertebral foramen. Contain either sensory (dorsal root) or motor (ventral root) information. Innervate the back of the neck and trunk (muscles and sensation) Innervate the anterior lateral regions of the neck and trunk, and all of the regions of the limbs (muscles and sensation) A network of nerves which intermingle so that each branch contains fibers from several different spinal levels. Cervical plexus, brachial plexus, lumbar plexus, and sacral plexus. Therefore, each muscle in a limb receives its nerve supply from more than one spinal nerve, and as a result, the destruction of a single spinal nerve cannot completely paralyze any limb muscle.
