Caffeine, but not time of day, increases whole-arm physiological tremor in non-smoking moderate users.
1. Consumptive levels of caffeine significantly increased whole-arm physiological tremor in young adult males at 3 but not 1 mg caffeine/kg bodyweight. 2. Physiological tremor was not affected by time of day (TOD) or the interaction of caffeine and TOD. 3. Findings suggest that ingestion of a single oral dose of caffeine at typical consumptive levels results in measurable changes in physiological functioning and that whole-arm physiological tremor is a sensitive measure of physiological change due to drug effects. 4. However, the results suggest that whole-arm physiological tremor may not detect reliably TOD changes in functioning.
Miller
L S
LS
The University of Georgia Department of Psychology, Athens 30602-3013, USA. LSMILLER@EGON.PSY.UGA.EDU
Lombardo
T W
TW
Fowler
S C
SC
D000328:Adult; D001132:Arm / Q000503:physiopathology*; D002110:Caffeine / Q000494:pharmacology*; D000697:Central Nervous System Stimulants / Q000494:pharmacology*; D006801:Humans; D008297:Male; D013997:Time Factors; D014202:Tremor / Q000139:chemically induced* / Q000503:physiopathology*
D000697:Central Nervous System Stimulants; D002110:Caffeine