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ABSTRACT During stage REM sleep, eye movements were found to be distributed in discrete bursts of rapid eye movement (REM‐bursts). REM‐burst time averaged approximately 10 percent of stage REM sleep and the rate within a subject was consistent from epoch‐to‐epoch and night‐to‐night. Consistent subject biases in eye movement direction were also found. Within subject correlations were obtained between REM‐burst time and autonomic activity. Significant positive correlations were found for respiration rate and number of finger pulse responses. There were positive but insignificant correlations with electrodermal activity, heart rate and decreases in respiration amplitude. Autonomic variability was not significantly associated with REM‐burst time.
Spreng et al. (Mon,) studied this question.