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17 Cards in this Set
- Front
- Back
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how many pairs of mixed nerves arise from spinal cord?
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31 pairs
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where nerves mingle
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plexus
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how many CERVICAL spinal nerves?
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8 cervical (C1-C8)
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how many THORACIC spinal nerves?
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12 thoracic (T1-T12)
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how many LUMBAR spinal nerves?
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5 lumbar (L1-L5)
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how many SACRAL spinal nerves?
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5 sacral (S1-S5)
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how many COCCYGEAL spinal nerves?
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1 coccygeal (C0)
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all cervical spinal nerves emerge ABOVE their corresponding vertebrae, except ___
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C8
(emerges below C7) |
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outside of cervical, all other spinal nerves emerge _____ the corresponding vertebrae
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BELOW
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these roots arise from the anterior horn and contain EFFERENT fibers
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ventral roots
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these roots arise from SENSORY neurons in DRG and contain AFFERENT fibers
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dorsal roots
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ventral roots contain ____ fibers and innervate ______
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efferent; skeletal muscles
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dorsal roots contain ____ fibers
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afferent
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these nerves are found in T1-L2 ONLY
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rami communicantes
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myelinated PRE-GANGLIONIC sympathetic neurons
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white communicating rami
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unmyelinated POST-GANGLIONIC sympathetic neurons
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grey communicating rami
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all ventral rami, except ___ - ___ form plexuses
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T2-T12
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