[Lithium oxybutyrate and the rhythmic structure of the actively exploratory behavior and body temperature in rats under constant illumination conditions].

Under constant illumination (LL 24) conditions, lithium hydroxybutyrate (LHB, daily dose 10 mg/kg, 10 days) facilitated the formation of synchronized 24-h rhythms in the active-search (open-field) behavior and body temperature variation in rats, independently of the objective drug administration time. In the dark (DD 24), LHB increased the free-running rhythms and facilitated synchronization of the internal harmonics, especially upon the drug administration in the objective p.m. phase.