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Our previous research with long term cannabis users established an impaired ability to focus attention and filter out irrelevant information, which was progressive with the cumulative duration of exposure to cannabis. The current study examined these processes in a group of ex-cannabis users. The results suggested a partial recovery of function but the past duration of cannabis use continued to have...
A 35 year old male was cognitively assessed prior to cessation of 18 years of daily cannabis use and monitored for several weeks post cessation. Brain event-related potential (ERP) measures of selective attention reflecting a difficulty in filtering out complex irrelevant information showed no indication of improvement over 6 weeks of abstinence. In contrast, when tested in the acutely intoxicated...
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