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Excerpt of a polygraphic recording of alternating leg muscle activation

The EMG channels show alternate contractions in both tibialis anterior muscles at about 1 to 2 Hz.

Legend: EOG: electrooculogram, Mylo: mylohyoideus muscle, Ext. Carpi.: extensor carpi muscle, Tib. Ant.: tibialis anterior muscle, ECG: electrocardiogram, Abd. Resp.: abdominal respirogram, R.: right, L.: left.

(Used with permission from Elsevier. From: Baldelli L, Provini F. Fragmentary hypnic myoclonus and other isolated motor phenomena of sleep. Sleep Med Clin 2021;16(2):349-61.)

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