Term
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Definition
| series of interconnected cavities within the cerebral hemispheres and brainstem filled with cerebrospinal fluid |
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Term
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Definition
| plasma-like clear fluid circulating in and around the brain and spinal cord |
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Term
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Definition
| column of nervous tissue from the brainstem through the vertebrae; responsible for nerve conduction to and from the brain and the body |
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Term
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Definition
| three membranes that cover the brain and spinal cord, consisting of the dura matter, pia matter, and arachnoid matter |
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Term
peripheral nervous system
(PNS) |
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Definition
| nerves that branch from the central nervous system including nerves of the brain (cranial nerves) and spinal cord (spinal nerves) |
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Term
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Definition
| 12 pairs of nerves arising from the brain |
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Term
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Definition
| 31 pairs of nerves arising from the spinal cord |
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Term
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Definition
| nerves that conduct impulses from body parts and carry sensory information to the brain; also called afferent nerves |
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Term
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Definition
| nerves that conduct motor impulses to smooth muscle, cardiac muscle, and various glands |
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Term
autonomic nervous system
(ANS) |
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Definition
| nerves that carry involuntary impulses to smooth muscle, cardiac muscle, and various glands |
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Term
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Definition
| control center for the autonomic nervous system located below the thalamus (diencephalon) |
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Term
| sympathetic nervous system |
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Definition
| division of the autonomic nervous system that is concerned primarily with preparing the body in stressful or emergency situations |
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Term
| parasympathetic nervous system |
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Definition
| division of the autonomic nervous system that is most active in ordinary conditions; it counterbalances the effects of the sympathetic system by restoring the body to a restful state after a stressful experience |
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Term
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Definition
| impairment because of localized brain injury that affects the understanding, retrieving, and formulating of meaningful and sequential elements of language, as demonstrated by an inability to use or comprehend words; occurs as a result of stroke, head trauma, or disease |
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