Positive Marijuana Research Database
The purpose of this study was to analyze individual human perceptions regarding what effect cannabis (marijuana) had on sexual function and satisfaction. They used a standard criteria for sexual response cycle consisting of desire, excitement, orgasm, plateau, resolution, and satisfaction. Participants included 811 individuals of varying ages, occupations, cannabis use preferences and gender. Overall, it […]
As part of the Philadelphia Neurodevelopmental Cohort, high-resolution T1-weighted MRIs were obtained from 781 youth aged 14–22 years. This sample included 147 cannabis (marijuana) users (109 used 1–2 times per week and 38 used 3 or more times per week) and 634 cannabis non-users. Several structural neuroimaging measures were examined, established procedures for stringent quality […]
Magnetic Resonance Imaging (MRI) was used to search for any effects on the hippocampus, which is a region of the brain especially involved in memory as well as motion. A group of 22 older, long-term cannabis (marijuana) users with an average lifetime of 20,100 smoking episodes were compared to 26 comparison subjects with no history […]
There are many who still question both the short and long term potential effects of cannabis (marijuana) use on multiple aspects of brain function, and those questions may take decades to fully answer. However, this study attempted to determine the non-acute effects of marijuana use on associative memory investigated with functional magnetic resonance imaging (fMRI). […]
During the several recent decades of cannabis (marijuana) prohibition, usage of the plant was often associated with negative brain effects in the propaganda pushed forth by those who profited from making the plant illegal. “Frying your brain” is one phrase that comes to mind. At the extreme end of the spectrum are those who will […]
Although medical marijuana is derived from the same plant species as recreational marijuana, those seeking medical relief often choose strains with unique chemical ratios not often sought by the recreational user. For example, medical users are more likely to choose profiles with significant CBD ratios present instead of seeking the highest level of THC possible. […]
Data from the National Health and Nutrition Examination Survey (NHANES) conducted between 2007 and 2012 was used to assess the effects of marijuana on thyroid function and autoimmunity in users. Information from 5280 adults ages 18 to 69 years, who responded to questions related to marijuana use and had laboratory results related to thyroid parameters […]
Since cannabinoid (marijuana components) receptors are found in movement related brain regions, some wished to evaluate the effect marijuana may have on human movement. 22 marijuana users average age twenty-four, were matched with 22 non marijuana users average age twenty-five. They completed screening tests, a gait and balance test, and a clinical neurological examination of […]
The hippocampus is a component of the brain associated with long term memory and spatial navigation. There has been ongoing debate regarding the effect of cannabis (marijuana) on hippocampal volume, and whether or not earlier age initiation of use, or higher doses of marijuana have any effect on its size. This study matched 20 heavy […]
It is biologically plausible that marijuana (cannabis) use could affect kidney function, and this cohort study set out to determine any relationships. Data from the Coronary Artery Risk Development in Young Adults (CARDIA) study was used. Past or current marijuana use was reported by 83% (3,131 out of 3,765) of the study participants. The authors […]