Repetitive nerve stimulation pre- and postexercise in a patient with myasthenia gravis

Stimulating the ulnar nerve at the wrist, recording the first dorsal interosseous. Maximal decrement noted to the right of traces.

(A) Baseline

(B) Immediately after 10 seconds of exercise (postexercise facilitation)

(C, D) Two and three minutes after 60 seconds of exercise (postexercise exhaustion)