| 释义 | myasthenia reactionmyasthenia reaction[‚mī·əs·thēn·ē·ə ri′ak·shən]  (medicine) The electromyographic reaction observed in myasthenia gravis in which there is a gradual loss of intensity and duration for the tetanic contraction, and a gradual diminution in amplitude and frequency of motor unit discharges until the muscle is fatigued. |