Bilateral Facial Spasm. Segment 1. Involuntary contraction of bilateral lower facial muscles when she is blinking her eyes (synkinesis), which are not simultaneous and are asynchronous on both the sides (there are a few very brief instances of contractions limited to one side of the face, indicating that contractions on each side of the face are independent). She also complains of extreme tightness in lower facial muscles, when she is at rest. Segment 2. Electromyography (EMG) ongoing spontaneous motor unit discharges even when she is at rest, and with blinking increased EMG activity is noted in the mentalis muscles (EMG needle is in mentalis muscle).