suatu keadaan atonik pada otot tubuh; disebut juga myatonia dan myatony.
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|Classification and external resources|
Myotonia (Myo from Greek; muscle, and Tonus from Latin; tension) is a symptom of a small handful of certain neuromuscular disorders characterized by delayed relaxation (prolonged contraction) of the skeletal muscles after voluntary contraction or electrical stimulation.
Generally, repeated contraction of the muscle can alleviate the myotonia and relax the muscles thus improving the condition, however this is not the case in Paramyotonia congenita. This phenomenon is known as "Warm-Up" and is not to be confused with warming up before exercise, though they may appear similar. Individuals with the disorder may have trouble releasing their grip on objects or may have difficulty rising from a sitting position and a stiff, awkward gait.
Myotonia can affect all muscle groups; however, the pattern of affected muscles can vary depending on the specific disorder involved.
People suffering from disorders involving myotonia can have a life-threatening reaction to certain anaesthetics; one of these conditions occurs when the patient is under anaesthetic and is termed "Malignant hyperthermia".