What Are Spinal Cord Nerves?
The spinal nerve is an important nervous system of the human body. It is symmetrical to the left and right across the entire spinal cord, and it forms four bundles from the ventral and dorsal sides.
Spinal nerve
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- Chinese name
- Spinal nerve
- Foreign name
- spinal nerves
- Human spinal nerve
- There are 31 pairs
- Spinal nerve
- Peripheral nerves emanating from the spinal cord
- The spinal nerve is an important nervous system of the human body. It is symmetrical to the left and right across the entire spinal cord, and it forms four bundles from the ventral and dorsal sides.
- Basically, it is a cephalic cord. From the dorsal lateral side, the dorsal root moves toward the intersegmental muscle, forming the dorsal (lateral) branch (ramus dorsalis) and distributed to the skin. The ventral roots from the ventral side to the sarcomere are not connected to the ra-mus ventrails at all. Animals that are taller than the round mouth are divided into ventral branches and dorsal roots after the dorsal and ventral roots merge. support. Dorsal and abdominal branches are mixed nerves, both with motor nerve fibers and sensory nerve fibers. Furthermore, during the course of the dorsal root, the nerve cell body, which is a sensory nerve fiber, is located in the spinal cord ganglia, the sympathetic nerve trunk, and its communication branches, and is separated from the two branches near the bifurcation. The dorsal branches are distributed to the muscles of the back and the skin on the dorsal side, showing a more regular arrangement. However, the abdominal branch is different. With the exception of the chest, as the organs that are distributed differentiate and move, the anterior and posterior nerves repeatedly anastomose to form a plexus before redistribution. There are 31 pairs of human spinal nerves (8 pairs of cervical nerves, 12 pairs of thoracic nerves, 5 pairs of lumbar nerves, 5 pairs of sacral nerves, and 1 pair of tail nerves).