myasthenic syndrome

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Muscular weakness that can arise through inherited defects in components of the neuromuscular junction (congenital myasthenic syndrome) or through autoimmune disorders that act on the acethylcholine receptors (myasthenia gravis) or the calcium channels at the neuromuscular junction (Lambert–Eaton myasthenic syndrome, LEMS). Congenital forms can arise through mutations in presynaptic release of acetylcholine, postsynaptic defects in acetylcholine receptors or, in the synaptic form, a deficiency of acetylcholine esterase. See rapsyn.

Subjects: Medicine and Health.

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