Muscular weakness. [G. mys, muscle, + astheneia, weakness]
- m. angiosclerotica SYN: intermittent claudication.
- m. gravis a disorder of neuromuscular transmission marked by fluctuating weakness and fatigue of certain voluntary muscles, including those innervated by brainstem motor nuclei; caused by a marked reduction in the number of acetylcholine receptors in the postsynaptic membrane of the neuromuscular junction, resulting from an autoimmune mechanism. SYN: Goldflam disease.

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my·as·the·nia .mī-əs-'thē-nē-ə n muscular debility also MYASTHENIA GRAVIS
my·as·then·ic -'then-ik adj

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my·as·the·nia (mi″əs-theґne-ə) [my- + asthenia] muscular weakness; any constitutional anomaly of muscle. myasthenic adj

Medical dictionary. 2011.

Look at other dictionaries:

  • Myasthenia — is a medical term for muscle weakness. The term may also refer to: Medical conditions Myasthenia gravis Ocular myasthenia Lambert Eaton myasthenic syndrome This disambiguation page lists articles associated with the same title …   Wikipedia

  • myasthenia — (n.) muscular weakness, 1856, medical Latin; see MYO (Cf. myo ) + ASTHENIA (Cf. asthenia) …   Etymology dictionary

  • myasthenia — [mī΄as thē′nē ə] [ModL: see MYO & ASTHENIA] muscular weakness or fatigue myasthenic [mī΄asthen′ik] adj …   English World dictionary

  • myasthenia — noun Etymology: New Latin Date: circa 1856 muscular debility; also myasthenia gravis • myasthenic adjective or noun …   New Collegiate Dictionary

  • myasthenia — noun Abnormal weakness of the muscles; but especially myasthenia gravis …   Wiktionary

  • myasthenia — [ˌmʌɪəs θi:nɪə] (also myasthenia gravis grα:vɪs, gravɪs) noun a rare chronic autoimmune disease marked by muscular weakness without atrophy. Origin C19: mod. L., from Gk mus muscle + asthenia …   English new terms dictionary

  • myasthenia — myasthenic /muy euhs then ik/, adj. /muy euhs thee nee euh/, n. Pathol. muscle weakness. [1855 60; MY + ASTHENIA] * * * …   Universalium

  • myasthenia — maɪəs θɪːnɪə n. muscular weakness (Pathology) …   English contemporary dictionary

  • myasthenia — my·as·the·nia …   English syllables

  • myasthenia — my•as•the•ni•a [[t]ˌmaɪ əsˈθi ni ə[/t]] n. pat muscle weakness • Etymology: 1855–60 my as•then′ic ˈθɛn ɪk adj …   From formal English to slang

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