| 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 containing axons of sensory and motor nuerons |
| parasympathetic divisions | efferent portion of the autonomic nervous system |
| plexus | network of interwoven nerves |
| Ramus | branch of spinal nerve |
| spinal nerve | one of the 31 pairs of nerves connected to the spinal cord |
| Sympathetic division | Efferent portion of the autonomic nervous system that arises from the thoracic and lumbar segments of the spinal cord |