- Generalized absence of muscle tone, usually associated with flabby musculature and an increased range of passive movement at joints. [G. a- priv. + mys, muscle, + tonos, tone]- a. congenita an indefinite term for a number of congenital neuromuscular disorders that cause generalized loss of muscle tone, and sometimes weakness, in infants and young children; most of these disorders have a benign course. SYN: congenital atonic pseudoparalysis, myatonia congenita, Oppenheim disease, Oppenheim syndrome.
* * *amyo·to·nia .ā-.mī-ə-'tō-nē-ə n deficiency of muscle tone
* * *amyo·to·nia (a″mi-o-toґne-ə) [a-1 + myotonia] atonic condition of the musculature of the body; called also myatonia and myatony.
Medical dictionary. 2011.