Spinal Nerves and Plexuses
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14 terms
Terms | Definitions |
|---|---|
 Cervical Nerves: C1-C8 |  |
| Thoracic Nerves: T1-T12 |  |
| Lumbar Nerves: L1-L5 |  |
| Sacral Nerves: S1-S4 |  |
| Coccygeal Nerve | the lowest pair of spinal nerves |
| Meissner corpuscles | Touch receptors in skin. Discriminative |
| Pacinian corpuscles | pressure receptors. Discriminative |
| Modulated | changed or adjusted to be suitable. I.e cannot feel toes when not thinking about them. |
| Dorsal root | sensory (afferent) fibers entering the grey matter of the spinal cord |
| Ganglion | collection of nerve cell bodies in the peripheral nervous system |
| Ventral root | motor (efferent) fibers exiting the gray matter of the spinal cord |
| pseudounipolar neuron | neuron with continuous dendrite and axon, with cell body off to one side |
| Non encapsulated receptors | Free nerve endings, pain and temperature nerves have this (non discriminative) |
| Lower motor neurons | located in PNS, cell bodies are located in spinal cord and their nerve fibers extend to and make direct contact with muscles |
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