motor neuron disease
Also found in: Dictionary, Thesaurus, Encyclopedia, Wikipedia.
1. pertaining to motion.
2. a muscle, nerve, or center that effects movements.
mo·tor neu·ron dis·ease (MND),
1. Synonym(s): amyotrophic lateral sclerosis
2. in the plural (that is, diseases) a generic term for a heterogenous group of disorders, all affecting motor neurons in the brain, spinal cord, or both, including spinal muscle atrophy, amyotrophic lateral sclerosis, progressive bulbar paralysis, and primary lateral sclerosis.
Synonym(s): motor system disease
motor neuron diseaseNeurology Any of a group of conditions characterized by progressive degeneration and dysfunction of the motor neuron or anterior horn cell–eg, amyotrophic lateral sclerosis–ALS; the terms are difficult to differentiate, and thus used interchangeably; the classic or sporadic form has an incidence rate of 2/105, characterized by upper limb weakness, atrophy, focal neurologic signs See Amyotrophic lateral sclerosis.
mo·tor neu·ron dis·ease(mō'tŏr nūr'on di-zēz')
A general term comprising progressive spinal muscular atrophy (infantile, juvenile, and adult), amyotrophic lateral sclerosis, progressive bulbar paralysis, and primary lateral sclerosis; frequently a familial disease.
motor neuron diseaseA rare disorder of unknown cause in which MOTOR nerve cells suffer gradual and progressive destruction. The condition is rare before the age of 40 and affects men twice as often as women. The initial symptoms depend on which neurons are first involved and include difficulty in swallowing and speaking, or wasting and weakness of the small muscles of the hands spreading to involve the forearms and later the legs. Progressive worsening leads to widespread paralysis of the whole body. Intellectual function is never affected. There is no known treatment. Also known as motor neurone disease.
mo·tor neu·ron dis·ease(MND) (mō'tŏr nūr'on di-zēz')
1. Synonym(s): amyotrophic lateral sclerosis.
2. In the plural (i.e., diseases) generic term for heterogenous group of disorders, all affecting motor neurons in the brain, spinal cord, or both.