Likewise, sensory nerve rootlets form off right and left dorsal lateral sulci and form sensory nerve roots the ventral (motor) and dorsal (sensory) roots combine to form spinal nerves (mixed motor and sensory), one on each side of the spinal cord spinal nerves, with the exception of c1 and c2, form inside the intervertebral foramen (ivf) these rootlets form the demarcation between the central and peripheral nervous systems. Nerves serving the limbs issue from these regions of the spinal cord in the spinal cord, the white matter surrounds the gray matter in the cerebral hemisphere, there is an outer “rind” of gray matter and. Spinal nerves arise from the spinal cord, and supply the rest of the body through the spinal nerves the cns receives information and controls the actions of the trunk and limbs they are formed by the union of dorsal and ventral roots.
Spinal nerve: spinal nerve, in vertebrates, any one of many paired peripheral nerves that arise from the spinal cord in humans there are 31 pairs: 8 cervical, 12 thoracic, 5 lumbar, 5 sacral, and 1 coccygeal each pair connects the spinal cord with a specific region of the body near the spinal cord each spinal. The spinal cord does not run through the lumbar spine (lower back) after the spinal cord stops in the lower thoracic spine, the nerve roots from the lumbar and sacral levels come off the bottom of the cord like a horse's tail (named the cauda equina) and exit the spine (view the spinal nerve roots with figure 1. Print exercise 21: spinal cord, spinal nerves, and the autonomic nervous system flashcards and study them anytime, anywhere.
Central nervous system (cns) the central nervous system is composed of the brain and spinal cord the brain has 12 cranial nerves the spinal cord, which originates immediately below the brain stem, extends to the first lumbar vertebra (l1.