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A spinal nerve is a mixed nerve, which carries motor, sensory, and autonomic signals between the spinal cord and the body. In the human body there are 31 pairs of spinal nerves, one on each side of the vertebral column. [1] [2] These are grouped into the corresponding cervical, thoracic, lumbar, sacral and coccygeal regions of the spine. [1]
The spinal cord or medulla spinalis; The brain or encephalon The hindbrain or rhombencephalon; The midbrain or mesencephalon; The forebrain or prosencephalon; Composition and central connections of the spinal nerves; Pathways from the brain to the spinal cord; The meninges of the brain and medulla spinalis; The cerebrospinal fluid; The cranial ...
Usually these arise as a web ("plexus") of interconnected nerves roots that arrange to form single nerves. These nerves control the functions of the rest of the body. In humans, there are 31 pairs of spinal nerves: 8 cervical, 12 thoracic, 5 lumbar, 5 sacral, and 1 coccygeal.
It is an essential connection between the body and the brain as well as between the two. The spinal cord has a diameter of 1 to 1.5 cm and a length of 40 to 50 cm. On either side, two successive rows of nerve roots appear. Thirty-one pairs of spinal nerves are formed by the distal union of these nerve roots.
Sectional organization of spinal cord. The spinal cord is the main pathway for information connecting the brain and peripheral nervous system. [3] [4] Much shorter than its protecting spinal column, the human spinal cord originates in the brainstem, passes through the foramen magnum, and continues through to the conus medullaris near the second lumbar vertebra before terminating in a fibrous ...
A mixed nerve is any nerve that contains both sensory and motor nerve fibers. [ 1 ] [ 2 ] All 31 pairs of spinal nerves are mixed nerves. [ 3 ] Four of the twelve cranial nerves – V , VII , IX and X are mixed nerves.
The four quarterfinal games will be played on New Year's weekend at the site of four bowl games, with one game on Dec. 31 and three on Jan. 1. TUESDAY, DEC. 31. Fiesta Bowl: ...
The spinal nerves are arranged into 31 pairs according to the regions of the spinal cord. To be more precise, there are eight pairs of cervical nerves (C1–C8), twelve pairs of thoracic nerves (T1–T12), five pairs of lumbar nerves (L1–L5), five pairs of sacral nerves (S1–S5), and one pair of coccygeal nerves. Peripheral nerves are ...
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