超的聚焦超声波通过刺激额头视野,以子区域的特异性来远程调节外层视觉皮质
Kai Yu1, Samantha Schmitt1, Yunruo Ni1
1Department of Biomedical Engineering, Carnegie Mellon University, Pittsburgh, PA 15213, United States of America.
Journal of neural engineering
|November 18, 2024
概括
低强度的跨骨聚焦超声波 (tFUS) 通过准正面眼界,有效调节视觉皮层的神经活动. 这种神经调节依赖于频率和空间特异性,突出了tFUSUS.
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.
- 神经成像是一种神经成像.
背景情况:
- 低强度的横聚焦超声波 (tFUS) 是一种神经调节工具,具有深度透和精确的空间准能力.
- 之前的研究已经广泛研究了使用电微刺激的上下调节电路.
研究的目的:
- 调查低强度tFUS刺激对眼前视野 (FEF) 的影响及其随后对 rhesus macaques 外层视觉皮层 (V4区域) 的影响.
- 使用tFUS探索FEF和V4之间的自上而下的调制电路.
主要方法:
- 从V4区域使用多电极阵列记录了本地电场潜力和多单元尖峰活动.
- 使用定制的128元随机阵列超声波传感器来精确地定位tFUS到FEF的空间目标.
- 针对岛屿进行了对照研究,以评估区域特异性.
主要成果:
- 在FEF调节V4神经元活动中的tFUS刺激,根据脉冲重复频率导致增强或抑制.
- 在FEF中以电子方式引导超声波聚焦,改变了V4调制的程度,证实了空间准.
- 在tFUS应用过程中,V4活动调制是频段特定的,并且取决于视觉刺激的存在;在准胰岛时没有观察到任何影响.
结论:
- 低强度tFUS可以有效调节特定大脑路径中的神经活动,证明其作为神经调节工具的潜力.
- 该研究提供了对tFUS影响神经网络的能力的全面了解,特别是上下调节电路.
- 这些发现支持tFUS在脑内针对性神经调节的区域特异性疗效.
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