在戒断使用大麻的青少年和年轻成年人中,积极的面部BOLD响应和任务依赖的腹部状功能连接在Go/No-go任务期间
Ryan M Sullivan1, Alexander L Wallace1, Carissa W Tomas2
1Department of Psychiatry, University of California, San Diego, La Jolla, CA, United States.
Frontiers in adolescent medicine
|March 12, 2026
概括
经常使用大麻会改变青少年和年轻人的大脑活动,影响在抑制任务期间对快乐面孔的反应. 这些变化甚至在禁酒两周后仍然存在,这表明潜在的风险.
科学领域:
- 神经科学是一个神经科学.
- 精神病学是一个精神病学.
- 成研究 研究成研究
背景情况:
- 经常使用大麻与神经奖励信号的改变有关.
- 关于大麻使用和情绪化面部处理,特别是青少年和年轻人的研究是有限的.
- 以前的研究主要使用货币或药物提示任务,而不是在抑制性环境中的情绪刺激.
研究的目的:
- 研究与对照组相比,经常使用大麻的青少年和年轻成年人在积极面部处理期间的大脑活动和连接性的差异.
- 在情绪化的Go/No-go任务中检查整个大脑和腹部条状状的激活.
- 评估腹状条纹体中的上下文依赖的功能连接.
主要方法:
- 参与者 (16-26岁) 包括经常使用大麻的人 (n=35) 和对照人 (n=33).
- 所有参与者都接受了至少两周的监控戒断.
- 功能性磁共振成像 (fMRI) 在涉及正面和中性面孔的情感Go/No-go任务中使用.
主要成果:
- 大麻使用者在正面面部条件下显示出血液氧气水平依赖 (BOLD) 响应的变化,这些响应发生在皮带和补充运动区域等区域.
- 在"No-go"试验中,大麻使用者在上额前部区域观察到减少了BOLD反应.
- 大麻使用者的腹腔条纹体活动在不同组之间存在差异,在"去"状态下增加,在"不去"状态下下降,没有显著的连接性发现.
结论:
- 在使用大麻的青少年和年轻成年人中,在积极的面部参与和抑制期间观察到异常的功能性大脑反应.
- 大麻使用者的腹腔条纹体活动是可变的,突出显示了奖励相关的情感处理的重要性.
- 这些观察到的差异,即使在戒断后,也可能表明与大麻使用相关的风险或其后果.
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