FIGURE 3. The rapid evolution of a sleep terror episode.
From the following article:
Insights from studying human sleep disorders
Mark W. Mahowald and Carlos H. Schenck
Nature 437, 1279-1285 (27 October 2005)
doi:10.1038/nature04287
A 24-year-old male patient has a long and increasingly severe history of violent sleep terrors. In the video prints shown here, the patient emerged precipitously from slow-wave NREM sleep, without any physiological or motor forewarning. This is typical of sleep terrors (see the text for more details).