在人类视觉皮层中的局部场势,尖端活动和受体场.
Lu Luo1,2, Xiongfei Wang3,4, Junshi Lu1,5
1School of Psychological and Cognitive Sciences and Beijing Key Laboratory of Behavior and Mental Health, Peking University, Beijing, 100871, China.
Science China. Life sciences
|November 13, 2023
概括
人类视觉皮层受体场 (RFs) 使用局部场潜力 (LFPs) 和神经活动进行了探索. 低频活动产生了更大的射频,而马活动与射频测量的尖峰活动密切相匹配.
科学领域:
- 神经科学是一个神经科学.
- 人类视觉皮层研究研究
- 感官处理 感官处理
背景情况:
- 受感场 (RF) 的概念是感官神经科学的基础.
- 神经元射频特性在动物中得到了很好的研究,但在人类中仍然很大程度上未被探索.
- 了解人类的射频对于推进视觉神经科学至关重要.
研究的目的:
- 在人类视觉皮层 (V1/V2/V3) 中测量神经元受体场 (RF).
- 为了比较来自不同频段的局部场势 (LFP) 估计的射频特性与尖端活动.
- 调查不同LFP频段在RF测量中大致估计神经元尖端活动的实用性.
主要方法:
- 人类视觉皮层中LFP和尖端活动的内记录 (V1/V2/V3).
- 使用LFPs的低频活动 (LFA,0.5-30 Hz),低马活动 (LGA,30-60 Hz) 和高马活动 (HGA,60-150 Hz) 来估计RF大小.
- 在V1中通过微线同时记录LFP和spiking活动,以便进行直接比较.
主要成果:
- 从LFA估计的射频大小比LGA和HGA大.
- 使用LGA和HGA测量的射频大小和时间概况与从尖端活动中得出的结果非常相匹配.
- 这表明,LFP中的LGA和HGA可以有效地接近人类V1.1中的尖端活动.
结论:
- 人类视觉皮层中的峰值活动可以很好地通过LGA和HGA进行射频估计和时间概况测量.
- LGA和HGA在人类大脑的早期视觉信息处理中发挥着关键作用.
- 这项研究为人类视觉处理机制提供了宝贵的见解,并为未来的研究开辟了道路.
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