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| parasympathetic |
relating to those parts of the autonomic nervous system, found in the middle and back parts of the brain and the lower spinal cord, that oppose the work of the sympathetic system, as in dilating the pupils or slowing the heart beat. |
| pia mater |
the innermost of three vascular membranes that envelop the brain and the spinal cord. (See arachnoid, dura mater.) |
| pith |
to kill by directly destroying brain or spinal cord tissue, as with a knife or wire. [1/5 definitions] |
| polio |
a short form of "poliomyelitis," a disease caused by a virus that attacks the spinal cord and damages the nervous system. Poliomyelitis affects mainly children and can lead to paralysis or deformed limbs. |
| poliomyelitis |
a disease caused by a virus that attacks the spinal cord and damages the nervous system. Poliomyelitis affects mainly children and can lead to paralysis or deformed limbs. Jonas Salk invented a vaccine that prevents poliomyelitis. |
| spina bifida |
a congenital defect in which part of the spinal cord protrudes from the spinal column, often resulting in severe neurological disorders. |
| spinal |
having to do with the spine or spinal cord. |
| spinal anesthesia |
partial or complete anesthesia produced by injecting an anesthetic directly into the spinal cord. |
| spinal column |
the row of bones that runs along the center of the back; spine; backbone. The bones of the spinal column are called vertebrae. The spinal column protects the nerves in the spinal cord. |
| white matter |
the nerve tissue, esp. of the brain and spinal cord, which is fibrous and nearly white. (Cf. gray matter.) |
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