Sleep postures and power spectrum analysis of the EEG of the rat.

An analysis of the relation between sleep postures and EEG power spectrum of young, adult and old male rats was performed. Three postures were distinguished: stretched, curved and curled up. A 5 minutes period of any posture was analyzed. The sleep data were gathered of the first two hours of the sleep period. The analysis revealed that the overall power of a curled up posture was less than that of two other sleep postures. Determination of a relation between an EEG measurement and sleep postures is promising.