Age of onset of marijuana use impacts inhibitory processing.

Age of onset of marijuana use impacts inhibitory processing.
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DOI:
10.1016/j.neulet.2012.01.039
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发表时间:
2012-03-09
影响因子:
2.5
通讯作者:
Killgore WD
Killgore WD
中科院分区:
医学4区
文献类型:
--
作者:
Gruber SA;Dahlgren MK;Sagar KA;Gönenc A;Killgore WD

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大麻(MJ)吸烟者成功抑制冲动行为的能力存在困难,但很少有研究直接比较早期(16岁之前)和晚期(16岁或以后)发作的MJ吸烟者,特别是在行为抑制任务中。本研究在慢性重度MJ吸烟者和健康非MJ吸烟对照者的功能磁共振成像(fMRI)期间使用多源干扰任务(MSIT),其揭示了对照者相对于吸烟者的前扣带回活动的更集中模式。早发性吸烟者有更多的局灶性激活,但往往使更多的委员会相对于晚发性吸烟者的错误,这表明可能的神经适应,尽管行为抑制的困难。进一步的研究是必要的,因为早期暴露于MJ可能会导致关键大脑区域的重组。
Difficulties in the ability to successfully inhibit impulsive behaviors have been reported in marijuana (MJ) smokers, yet few studies have made direct comparisons between early (prior to age 16) and late (age 16 or later) onset MJ smokers, specifically during behavioral inhibition tasks. The current study utilized the Multi-Source Interference Task (MSIT) during functional magnetic resonance imaging (fMRI) in chronic, heavy MJ smokers and healthy non-MJ smoking controls which revealed a more focal pattern of anterior cingulate activity in controls relative to smokers. Early onset smokers had more focal activation but tended to make more errors of commission relative to late onset smokers, suggesting a possible neural adaptation despite difficulty with behavioral inhibition. Further investigation is warranted, as early exposure to MJ may result in reorganization of critical brain regions.
DOI: 10.1037/a0026269
发表时间: 2012-09
影响因子: 3.4
作者:
Gruber, Staci A.;Sagar, Kelly A.;Dahlgren, Mary Kathryn;Racine, Megan;Lukas, Scott E.
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