title: The effects of chronic marijuana use on circadian entrainment.
abstract: Animal literature suggests a connection between marijuana use and altered circadian rhythms. However, the effect has not yet been demonstrated in humans. The present study examined the effect of chronic marijuana use on human circadian function. Participants consisted of current users who reported smoking marijuana daily for at least a year and non-marijuana user controls. Participants took a neurocognitive assessment, wore actigraphs and maintained sleep diaries for three weeks. While no significant cognitive changes were found between groups, data revealed that chronic marijuana use may act as an additional zeitgeber and lead to increased entrainment in human users.
authors: Department of Psychology, University of California , Riverside, CA , USA and.
authors: Lauren N
authors: LN
authors: Whitehurst
authors: Kethera
authors: K
authors: Fogler
authors: Kate
authors: K
authors: Hall
authors: Matthew
authors: M
authors: Hartmann
authors: Jeff
authors: J
authors: Dyche
mesh_terms: D000293:Adolescent; D000328:Adult; D001519:Behavior / Q000187:drug effects; D002188:Cannabis; D002940:Circadian Rhythm / Q000187:drug effects*; D003071:Cognition / Q000187:drug effects*; D005260:Female; D006801:Humans; D008297:Male; D012890:Sleep / Q000187:drug effects*; D013997:Time Factors; D055815:Young Adult
keywords: Cannabis; circadian rhythms; entrainment; marijuana; zeitgeber