RESUMO
In the present work sedative and hypnotic effects of aqueous extract of Aloe vera in rats have been investigated. In order to evaluate the overall hypnotic effects of the Aloe vera extract, open field and loss of righting reflex tests were primarily used. The sedative and hypnotic effects of the extract were then confirmed by detection of remarkable raise in the total sleeping time through analysis of electroencephalographic [EEG] recordings of animals. Analysis of the EEG recordings showed that there is concomitant change in Rapid Eye Movement [REM] and None Rapid Eye Movement [NREM] sleep in parallel with the prolonged total sleeping time. Results of the current research show that the extract has sedative-hypnotic effects on both functional and electrical activities of the brain