Myotonia |
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| Myotonic Phenomenon; Percussion Myotonia; Myotonia, Percussion; Myotonias; Myotonias, Percussion; Myotonic Phenomenons; Percussion Myotonias; Phenomenon, Myotonic; Phenomenons, Myotonic | |
| Prolonged failure of muscle relaxation after contraction. This may occur after voluntary contractions, muscle percussion, or electrical stimulation of the muscle. Myotonia is a characteristic feature of MYOTONIC DISORDERS. | |