Diseases characterized by MYOTONIA, which may be inherited or acquired. Myotonia may be restricted to certain muscles (e.g., intrinsic hand muscles) or occur as a generalized condition. These disorders may be associated with abnormal muscle SODIUM CHANNEL and CHLORIDE CHANNELS. MYOTONIC DYSTROPHY and MYOTONIA CONGENITA represent two relatively common forms of this disorder. Proximal myotonic myopathy often presents with myotonia and muscle pain in early adulthood and later in life thigh muscle weakness and cataracts develop. (From Adams et al., Principles of Neurology, 6th ed, p1392)

Descriptor ID	D020967
MeSH Number(s)	C05.651.662 C10.668.491.606
Concept/Terms	Myotonic Disorders Myotonic Disorders Disorder, Myotonic Disorders, Myotonic Myotonic Disorder Myopathies, Myotonic Myopathy, Myotonic Myotonic Myopathies Myotonic Myopathy Myotonic Myopathy, Proximal Myotonic Myopathy, Proximal Myopathies, Proximal Myotonic Myopathy, Proximal Myotonic Myotonic Myopathies, Proximal Proximal Myotonic Myopathies Proximal Myotonic Myopathy PROMM (Proximal Myotonic Myopathy) PROMMs (Proximal Myotonic Myopathy) Paramyotonia Congenita Paramyotonia Congenita Congenita, Paramyotonia Paramyotonia Congenitas Eulenburg's Disease Disease, Eulenburg's Eulenburgs Disease Eulenburg Disease Disease, Eulenburg Myotonia Fluctuans Myotonia Fluctuans Fluctuans, Myotonia

Below are MeSH descriptors whose meaning is more general than "Myotonic Disorders".

Below are MeSH descriptors whose meaning is related to "Myotonic Disorders".

Below are MeSH descriptors whose meaning is more specific than "Myotonic Disorders".