Myotonic dystrophy type 1 presenting with dyspnea: A case report

Figure 2 The patient's typical electromyography. Electromyography of the proband: myotonia potentials were visible in the resting state of the examined extremity muscles and the orbicularis oris muscles, the motor unit potential time limit was shortened, and the amplitude was decreased. A: Left sternocleidomastoid muscle; B: Right deltoid; C: Right tibial anterior muscle; D: Left medial femoris muscle; E: Left tibial anterior muscle; F: Left orbicularis muscle.