Behavioral and Biological Concomitants of Chronic Marihuana Use.
Final rept. 1 Apr 73-31 Aug 74,
MCLEAN HOSPITAL BELMONT MASS
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The behavioral and biological concomitants of chronic marihuana use were studied in a group of heavy and casual users under controlled research ward conditions. Assessments of operant work performance revealed that most subjects showed no impairment in motivation to work for money reinforcement even when they smoked a large number of marihuana cigarettes. Some dose-related decrement in performance was noted following days of heavy marihuana smoking however, these decrements were probably not biologically significant. No significant changes were observed in a large series of physical and laboratory assessments following marihuana smoking. The only significant changes were those related to vital capacity lung function and these changes may be more closely related to the processes of smoking per se than to the pharmacological actions of marihuana.
- Anatomy and Physiology