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18 Cards in this Set
- Front
- Back
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conus medularis
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tapered end of cord
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cauda equina
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horses tail, nerves hanging off end of cord
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filum terminale
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pia matter extension to anchor cord to coccyx
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denticulate ligaments
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CT strands anchoring cord w/in canal
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cervical and lumbar enlargements
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becuase of plexuses
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central canal
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contains CSF
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anterior lateral and posterior horns
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gray matter, motor neuron cell bodies would be located, in the anterior and lateral horns
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dorsal root ganglia
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where sensory neuron cell bodies are located
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columns
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in white matter, tracts running up and down cord to and from brain
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commissure fibers
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carry info from one side of spinal cord to the other
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dorsal root
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contains sensory axons coming into cord
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ventral root
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contains motor axons exiting spinal cord.
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sensory reflex arc
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sensory receptor, sensory neuron, interneuron, motor neuron, effector orgon.
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Stretch reflex
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stretch of spindle
stimulation of the sensory neurons stimulation of alpha neurons in spinal cord alpha neurons stimulate muscle causing contraction of he stretched muscle collateral axons of the sensory neurons also go to CNS to let it know wthat a muscle is being stretched. |
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Golgi-tendon reflex
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prevents damage to tendons and muscles from over stretch , involves inhibatory neurons
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withdawal reflex
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pain sensory receptors, both excitatory andd inhibitory neurons. removes body part from harm, the reciprocal innervation is using the inhibitory neuron so antagonistic muscle doesnot oppose movement
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crossed extensor reflex
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associated with withdrawal reflex, fibers cross over to other side to keep balance.
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structure of peripheral nerve
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have fasicles wich are covered by epineurium, inside is the endoneurium, and around all the fascicles is the perineurium.
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