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27 Cards in this Set
- Front
- Back
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How many pairs of spinal nerves are there, and where are each in terms of the spine?
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31:
8 Cervical 12 thoracic 5 - lumbar 5 - sacral 1 - coccygeal |
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What is the end of the spinal cord called? What is the name for the arrangement of nerves past this part?
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Conus medullaris is the end, Cauda Equina is the arrangement.
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Where does Spinal nerve C1 exit the spinal cord? T1? L1? S1?
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C1 - above Vertebra C1
T1 - below vertebra T1 L1 - below L1 vertebra S1 - below vertebra S1 |
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Which part of the spinal cord contains the myelinated neurons? Which contains the cell bodies? Which is inner/outer?
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The OUTER white matter contians neurons, the inner grey matter contains cell bodies
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What type of Polarity do sensory neurons have?
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Pseudo-unipolar - cell body on the side
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Where are the cell bodies for sensory neurons contained?.
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In the Dorsal root ganglion (aka Spinal Ganglion)
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a - Dorsal horn
b - ventral horn c - dorsal rootlets d - dorsal root e - ventral root f - ventral rootlets g - dorsal root ganglion h - dorsal primary ramus i - ventral primary ramus j - spinal nerve k - spinal ganglion (DR ganglion) |
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a - pia mater
b - Dura mater c - arachnoid mater d - meninges |
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Where is the CSF located, in relation to the meninges?
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Deep to the arachnoid mater, in the sub-arachnoid space
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Where does a spinal nerve exit the vertebral column?
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At the intervertebral foramen
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what allows muscles to give feedback information, thus being sensory and motor - ly innvervated?
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Muscle spindles
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Where is the cell body of a sensory nerve located? Where do each part of it's nerve fibers go to and go THROUGH, and what is each part called?
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Cell bodies - dorsal root ganglion
Central nerve fibers go through the dorsal root into the dorsal horn. Peripheral nerve fibers thru the spinal nerve into dorsal/ventral primary rami |
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Where are MOTOR nerve cell bodies located? Where does it's fiber go to and through?
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Cell body in ventral horn
Fiber goes laterally through the ventral roots and spinal nerve to dorsal/venral primary rami |
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What type of nerves fibers do Dorsal roots contain?
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sensory ONLY
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What type of nerve fibers do Ventral roots contain?
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motor ONLY
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What type of nerve fibers do dorsal primary ramus contain?
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BOTH
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What type of nerve fibers to ventral primary ramus containt?
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BOTH
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What does a dorsal primary ramus supply?
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Deep back muscles, and skin
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What does a ventral primary ramus supply?
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Skeletal muscles, skin, as well as sympathetic fibers for smooth muscles
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What is the name for a level of lateral cutaneous nerves?
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Dermatome
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Which 3 spinal nerves supply the diaphram?
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C3 4 5
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What are the 2 divisions of a dorsal primary ramus?
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Medial and lateral branches
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What are the 4 divisions of a ventral primary ramus
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Muscular
Lateral/Anterior Cutaneous branches White rami communicantes Grey rami communicantes |
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Which Spinal nerve lacks a dermatome?
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C1
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Describe a motor neuron in terms of:
1 - # of neurons, where each cell body is 2 - Where the axon goes when coming off the cell body |
1 - it has 2 neurons - 1st CB in lat horn 2nd in the paravertebral aka Sympathetic trunk ganglia
2 - the 1st neuron has cell body in lateral horn, comes off through ventral root and into spinal nerve, thru ventral primary ramus, then to White Ramus Communicans. Then, it goes to Sympathetic Trunk Ganglion. it synapses w/ 2ND neuron, which returns to the spinal nerve via GRAY RAMUS COMMUNICANS - dorsal/ventral primary ramus to effector area |
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What type of ganglia are associated w/ the viscera?
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Pre-vertebral ganglia (IN FRONT OF VERT. COLUMN)
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Which nerve supplies innervation to heart/lungs/lower 2/3 of GI tract? What # is it?
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Vagus nerve #10
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