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. Author manuscript; available in PMC: 2022 Apr 28.
Published in final edited form as: Arch Ital Biol. 2001 Feb;139(1-2):23–36.

Fig. 1. -. Examples of low speed polygrams from two turtles, showing how behavioral stages were identified.

Fig. 1. -

ECG - electrocardiogram; EMG - neck musculature electromyogram, EEG-electroencephalogram; EOG - electrooculogram; QW - quiet wakefulness; T - transitional stage; Q1 and Q2 - two stages of quiescence. A: Recording at 28°C. Inset: the waveform of EEG spikes. Note disappearance of EEG spikes in QW. B) Recording at 23 (C. Inset: Leg EMG components in ECG allowed discrimination of two stages of quiescence. Note the difference in the rate and amplitude of EEG spikes in (A) versus (B).