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25 Cards in this Set
- Front
- Back
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there are ____ pairs of ____ ____ arising from the spinal cord
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31 - mixed nerves
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spinal cord transmit ____ info from the CNS to the body (efferent)
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motor
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spinal cord transmit ____ info to the cord (afferent)
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sensory
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bundle of spinal nerves that exit inferior to the end of the spinal cord are collectively called
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cauda equina
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spinal nerves are numbered according to …
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where they leave the spinal cord
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how many pairs of cervical nerves
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8 pairs
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which spinal nerve exits between the occipital bone and the atlas
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C1
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which spinal nerves exit through intervertebral foramina above which they are named
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C1 - C7
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where does C8 exit
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below C7 + above T1
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which are spinal nerves exit below the vertebrae they are named after
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all but C1 - C8
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How many pairs of Thoracic nerves ?
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12 pairs
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How many pairs of Lumber nerves?
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5 pairs
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how many pairs of sacral nerves
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5 pairs
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how many pairs of coccygeal nerves
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1 pair
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the dorsal root ganglion contains
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unipolar sensory neuron cell bodies
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the ventral root contains all
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outgoing motor (somatic + autonomic)
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each spinal nerve connects to the spinal cord by ____ and ____ ____
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dorsal -ventral roots
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the spinal nerves bifurcate forming the ____ & ____ ____
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dorsal - ventral rami
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4 divisions of the ventral root
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dorsal ramus - ventral ramus - meningeal branches - rami communicantes
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the dorsal rami innervate
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muscles of the back of the posterior trunk
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most of the plexuses are formed from the ____ ____
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ventral rami
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which nerves don't form plexuses
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T2 - T12
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T2 - T12 form nerves that innervate
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intercostal muscles for breathing
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meningeal branches innervate
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meninges surrounding spinal cord
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rami communicantes are part of the
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autonomic n.s..
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