The flashcards below were created by user
elementsninja
on FreezingBlue Flashcards.
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33 Vertebra:
- 7 Cervica
- 12 Thoracic
- 5 Lumbar
- 5 Sacral
- 4 Coccyx (fused)
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31 Pairs of Spinal Nerves:
- 8 Cervical
- 12 Thoracic
- 5 Lumbar
- 5 Sacral
- 1 Coccyx (fused)
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pathways going UP to the brain carrying sensory information
Ascending (Afferent)Pathways
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a neural pathway that controls ACTION reflex without input from the CNS
Reflex Arc
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Most nerve impulses move up spinal cord to brain and back down thru spinal cord to peripheral nerves…however, some merely enter thru dorsal root of cord, synapse, and exit thru ventral root of cord. (ie. the knee jerk reflex)
-Intact cord have message sent to brain at same time
-Some SCI have reflexes without voluntary muscle control (UMN) and some don’t have any reflexes below level of injury (LMN)
Reflex Arc
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an area of the skin supplied by nerves from a
single spinal root.Each of these nerves relays
sensation, including pain, from a particular region
of the skin to the brain.
Dermatome
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motor pathways delivering signal for movement/response to stimuli
Efferent (Descending)
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