Lithium chloride changes sensitivity of hamster rhythm to light pulses

Abstract

Lithium chloride (0.047 M) lengthens the period of running wheel activity of Syrian hamsters by 0.2 h. The phase‐shifting effect of light pulses are affected by this salt: Delays are increased by 0.3 h, and advances reduced by 1.5 h. The switchover from delays to advances is delayed by 1.0 h. No effect of Li+on the phase‐shifting of light pulses was found during the subjective day.