Figure 3
Upper trace: a 2.5-second TA in Patient 8 was recorded during hyperventilation with breath counting on baseline video-EEG, just before the ambulatory part of the HVET. The regular rate of her sequential breathing, shown by the first three black arrows, is apparently distorted by the GSWD. The grey arrow shows the time her next breath was expected and the black arrow on the right, the time it actually occurred. The patient felt this delay as she smiled shortly afterwards. Lower trace: a longer discharge during the HVET, associated with a similar motor arrest (note the pause of EMG activity from the deltoids). The patient was not in view of the camera on this occasion.