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| amyotrophic lateral sclerosis |
a disease that causes loss of control in muscle movement because of the degeneration of nerve cells; Lou Gehrig's disease. |
| axon |
the part of a nerve cell that conducts impulses away from the cell body. |
| demyelination |
loss of the myelin sheath surrounding nerve cells that causes impaired function, as in multiple sclerosis. |
| dendrite |
a branching extension of a nerve cell that carries impulses to the cell body. [1/2 definitions] |
| ganglion |
any concentrated mass of nerve cells outside the brain or spine, serving as the source of nerve impulses. [1/2 definitions] |
| gray matter |
the grayish nerve tissue of the brain and spinal cord, consisting largely of nerve cells and fibers. (Cf. white matter.) [1/2 definitions] |
| MS2 |
abbreviation of "multiple sclerosis," a degenerative disease of the nervous system in which nerve cells of the brain or spinal cord lose their myelin sheaths, resulting in hardening of the neural tissue, speech difficulties, and loss of muscular coordination. |
| multiple sclerosis |
a degenerative disease of the nervous system in which nerve cells of the brain or spinal cord lose their myelin sheaths, resulting in hardening of the neural tissue, speech difficulties, and loss of muscular coordination. |
| nerve center |
a group of closely connected nerve cells that performs a particular function. [1/2 definitions] |
| neuron |
a single nerve cell, including its axons and dendrites. |
| neurotoxic |
poisonous to nerve cells or nervous tissue. |
| neurotoxin |
a substance that is toxic to nerve cells or nerve tissue. |
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