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Comparative effects of smoking marihuana or placebo on human motor and mental performance
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1970
Year
NeuropsychologySubstance UseHuman MotorCannabinoid PharmacologyPsychologySocial SciencesTobacco ControlNicotineAddiction MedicinePsychoactive Substance UseCannabis UsePlacebo CigarettePsychoactive DrugPsychiatryBehavioral NeuroscienceNeuropharmacologyComparative EffectsRehabilitationCannabisSubstance AbuseCognitive PerformanceAddictionMedicineMarihuana CigarettePsychopathologyMental Performance
Motor and mental performance was tested after smoking a placebo cigarette and after smoking a marihuana cigarette calibrated to deliver 5 mg. of delta‐9‐tetrahydrocannabinol. A significant decrement in all motor performance tests and in five of nine mental performance tests was observed after the marihuana cigarette. We were not able to detect any cannabinols in the blood or urine of subjects who smoked the marihuana.