Methamphetamine Induces Nonphotic Resetting of Circadian Clock in the Male Syrian Hamster.

Abstract

Resetting of circadian clocks in male Syrian Hamsters can be manipulated photically and nonphotically. Previous work suggested that Propranolol, a know beta-adrengergic antagonist, may block nonphotic clock resetting in male Syrian Hamsters. To test this hypothesis, we administered adregnergic agonists that may induce resetting of the circadian clock without the need for behavioral stimulation.