Schulz, H. and Dirlich, G. and Zulley, Jürgen
Untersuchungen zur Stabilität ultradianer Rhythmen beim Menschen. (= Studies on the stability of human ultradian rhythms (author's transl.)).
Arzneimittel-Forschung = Drug research 26 (6), pp. 1055-1058.
It was investigated whether the REM-NREM (rapid eye movement-non-REM) sleep rhythm has a stable period during long-term observations. Sequences of 17 to 31 consecutive sleep records were analyzed for 6 test subjects and 1 patient. Period stability was confirmed for three experimental conditions: a) undisturbed night sleep, b) inversion of the sleep-waking cycle, c) absence of external timing ...
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