| A | B |
|---|
| cauda equina | the lower end of the spinal cord |
| cranial nerve | one of the twelve pairs of nerves arising from the undersurface of the brain |
| dermatome | skin surface area supplied by sensory fibers of a single spinal nerve |
| ganglion | cluster of nerve cell bodies outside the central nervous system |
| mixed nerve | nerve containg axons of sensory and motor neurons |
| parasympathetic division | arises from the brain stem and the sacral segment of the spinal cord |
| plexus | network of interwoven nerves |
| ramus | branch of a spinal nerve |
| reflex | action resulting from a nerve signal passing over a reflex arc |
| spinal nerve | one of the 31 pairs of nerves connected by the spinal cord |
| sympathetic division | effernt portion of the autonomic nervous system |
| ventral | anterior |
| dorsal | posterior |
| phrenic nerve | innervates the diaphragm |
| myotome | skeletal muscle or group of muscles that receives motor axons from a given spinal nerve |
