PsychologyPerceptual and Motor Skills
Ultradian Rhythms in Task Performance, Self-Evaluation, and EEG Activity
M. Hayashi, K. Sato, et al.
EEG power spectra, mood, performance, and self-evaluation measured every 15 minutes for 9 hours in 10 male students revealed distinct ultradian cycles: a ~90–100 minute rest–activity rhythm linked to behavior and subjective states, and multiple EEG rhythms (6 and 10–18 cycles/day) supporting a multioscillator model. This research was conducted by Mitsuo Hayashi, Kayo Sato, and Tadao Hori.
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