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杏仁体的超焦点超声波调节恐惧网络激活和连接
Tina Chou1, Thilo Deckersbach1, Bastien Guerin2
1Department of Psychiatry, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA, USA.
Brain stimulation
|March 6, 2024
概括
超焦超声波 (tFUS) 有效调节杏仁体活动和恐惧电路,从而减少焦虑. 这种非侵入性脑刺激显示出治疗焦虑症的前景.
科学领域:
- 神经科学是一个神经科学.
- 神经调节是一种神经调节.
- 精神病学研究 精神病学研究
背景情况:
- 目前的非侵入性脑刺激方法不能直接准对于精神疾病至关重要的皮下区域.
- 超焦超声 (tFUS) 提供了一种新的方法来调节像杏仁体这样的深层大脑结构,这与恐惧有关.
- 杏仁核在恐惧中的作用使其成为理解和治疗与焦虑相关的疾病的关键目标.
研究的目的:
- 为了研究活跃与虚假tFUS在诱导恐惧的任务期间对杏仁体激活的影响.
- 评估tFUS对恐惧回路功能连接和生理/自我报告的焦虑的影响.
- 为了确定tFUS是否可以改变杏仁体恐惧电路内的静止状态功能连接.
主要方法:
- 三十名健康参与者被随机分配,接受活跃或假的TFUS,以双盲设计准左桃体.
- 功能磁共振成像 (fMRI),皮肤导电性反应 (SCR) 和自我报告的焦虑在恐惧诱导任务期间在tFUS之前和之后被测量.
- 休息状态fMRI扫描也被获得以评估功能连接的变化.
主要成果:
- 与假的tFUS相比,活跃的tFUS在恐惧任务期间显著降低了杏仁体激活.
- 杏仁核激活的减少与主观焦虑的减少相关.
- 活跃的tFUS也导致了包括海马体,前带皮质,胰岛和中腹前额皮质在内的区域的功能连接性发生变化.
结论:
- tFUS可以有效地改变与恐惧相关的电路中的大脑激活和功能连接.
- 观察到的变化与自我报告的焦虑的减少有关.
- tFUS显示出作为焦虑障碍治疗工具的潜力,需要进一步调查.
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