Newsgroup: italia.bologna.politica
Titolo: Minimal Long-Term Effects Of Marijuana Use Found In Central Nervous System By UCSD Researchers

Minimal Long-Term Effects Of Marijuana Use
 Found In Central Nervous System By UCSD Researchers
 
  An analysis of research studies with long-term, recreational users of 
marijuana has failed to reveal a substantial, systematic effect on the 
neurocognitive functioning of users. According to researchers at the 
University of California, San Diego (UCSD) School of Medicine, the only 
deleterious side effect found was a minimal malfunction in the domains of 
learning and forgetting.
The findings were particularly significant considering the movement by 
several states to make cannabis (marijuana) available as a medicinal drug, 
and questions regarding its potential toxicity over long-term usage.
Published in the July issue of the Journal of the International 
Neuropsychological Society, the study involved a quantitative synthesis of 
15 previously published research studies on the non-acute (residual) 
effects of cannabis on the neurocognitive performance of adult human 
subjects.
The studies included 704 long-term cannabis users and 484 non-users. The 
neurocognitive performance measurements included simple reaction time, 
attention, verbal/language, abstraction/executive functioning, 
perceptual/motor skills, motor skills, learning and forgetting.
?Surprisingly, we saw very little evidence of deleterious effects. The only 
exception was a very small effect in learning new information,? said Igor 
Grant, M.D., the study?s senior author, a UCSD professor of psychiatry, and 
director of the Center for Medicinal Cannabis Research (CMCR), a 
collaborative, state-supported program between UCSD and UC San Francisco, 
that oversees 11 studies of the safety and efficacy of medicinal cannabis 
to treat certain diseases. 
In describing the negative effects in the study, the research team said the 
problems observed in learning and forgetting suggest that chronic long-term 
cannabis use results in selective memory defects. They added that ?while 
the results are compatible with this conclusion, the effected size for both 
domains was of a very small magnitude.?
Grant added that the minimal side effects seen ?raised the question of 
practical significance. If we barely find this tiny effect in long-term 
heavy users of cannabis, then we are unlikely to see deleterious side 
effects in individuals who receive cannabis for a short time in a medical 
setting.?
In addition, Grant said that heavy marijuana users often abuse other drugs, 
such as alcohol and amphetamines, which also might have long-term 
neurological effects. This raises the question of the extent to which the 
other drugs contributed to the minimal problems found in learning and 
forgetting in the marijuana users. 
The paper?s authors also noted that many of the research studies examined 
had significant limitations, either with small numbers of subjects or 
insufficient information about potential confounding factors, such as 
exposure to other drugs or presence of neuropsychiatric factors such as 
depression or personality disorders. 
They noted that only studies that begin with the examination of children 
and young adolescents before they enter the period of risk to cannabis 
exposure, can sufficiently reduce the influence of these additional factors.
In addition to Grant, the paper?s authors included doctoral students Raul 
Gonzalez, M.S., and Catherine L. Carey, M.S. and Loki Natarajan, Ph.D., 
UCSD HIV Neurobehavioral Research Center (HNRC) and UCSD Department of 
Family and Preventive Medicine, and Tanya Wolfson, M.A., UCSD HNRC.
The study was supported by the CMRC
http://ucsdnews.ucsd.edu/newsrel/health/longtermcannabis.htm
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 ha scritto nel messaggio
news:IJgPa.11442$it4.2...@news1.tin.it...
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Non ho capito bene la domanda:non conosci l'inglese o fai fatica con 
l'inglese scientifico?
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 ha scritto nel messaggio
news:QplPa.13020$it4.3...@news1.tin.it...
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 Non comprendo proprio l'inglese, per me è una lingua impossibile.
Quello che ho postato è il risultato di una ricerca dell'università della 
california sui consumatori abituali di marjuana.
Dice che non sono stati riscontrati danni duraturi.
solo qualche piccola diminuzione della capacità di imparare e ricordare.
trovi la ricerca (in inglese) sul sito dell'università
www.ucsd.edu
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 --
Ho capito,
si può paragonare la marijuana alla borsa dei paradisi...
uso il prodotto e va tutto bene ma se non ho la certezza di trovarlo mi
ritiro sul dove posso trovarlo
o dove posso trovare paliativi lasciando cadere l'interesse per le cose che
propone chi non mi fa trovare ciò che cerco.

 trovi la ricerca (in inglese) sul sito dell'università
Non lo trovi un po fuori luogo ?
E' del tutto of-topic no?
Dicasi "Politica"
'l'arte di risolvere i problemi con la parola'
Ti sembra che in 60 anni ci "civiltà" abbiano risolto qualcosa?
...Sei decisamente fuori tema.
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