SI
SI
discoversearch

We've detected that you're using an ad content blocking browser plug-in or feature. Ads provide a critical source of revenue to the continued operation of Silicon Investor.  We ask that you disable ad blocking while on Silicon Investor in the best interests of our community.  If you are not using an ad blocker but are still receiving this message, make sure your browser's tracking protection is set to the 'standard' level.
Politics : Mainstream Politics and Economics
 Public ReplyPrvt ReplyMark as Last ReadFilePrevious 10Next 10PreviousNext  
To: Wharf Rat who wrote (20534)7/24/2012 6:43:25 PM
From: Brumar89  Read Replies (1) of 85487
 
WORKING MEMORY AND MARIJUANA USE The relationship between marijuana use and working memory deficits in the nonpsychiatric population is complex. Reviews 21, 22 of working memory function in psychiatrically healthy individuals who smoke marijuana regularly concluded that such individuals exhibit performance impairment on primary and secondary working memory tasks relative to healthy controls, and such impairments have been found to be associated with the self-reported frequency of marijuana smoking. 23, 24 However, such deficits have been found less consistently than in participants with schizophrenia only. When present in non-schizophrenic marijuana users, the impairment is generally of a less severe degree 21, 22 and is less stable 25 than is typically seen in participants with schizophrenia only. Thus, regular marijuana use in the natural ecology may be associated with modest and short-term deficits in working memory performance when participants are not acutely intoxicated.

Of note, young marijuana smokers were found to exhibit alterations in activation of the prefrontal and parietal cortices in response to working memory tasks during functional magnetic resonance imaging (under conditions of short-term marijuana abstinence) relative to non-using controls. 26, 27 This indicates functional alteration in brain regions relevant to the development of psychopathology in young marijuana smokers while they engaged their working memory.

Although these studies of the residual sequelae of marijuana smoking suggest that marijuana smoking contributes to working memory deficits, the cross-sectional and correlational nature of the studies reviewed thus far do not allow an assessment of marijuana’s direct effects on working memory.



.........
ncbi.nlm.nih.gov
Report TOU ViolationShare This Post
 Public ReplyPrvt ReplyMark as Last ReadFilePrevious 10Next 10PreviousNext  

HomeMailHotSubjectMarksPeopleMarksKeepersSettings
Terms Of UseContact UsCopyright/IP PolicyPrivacy PolicyAbout UsFAQAdvertise on SI
© 2025 Knight Sac Media.  Data provided by Twelve Data, Alpha Vantage, and CityFALCON News