在人类大脑皮层的形和功能活动的光学成像
M M Haglund1, G A Ojemann, D W Hochman
1Department of Neurological Surgery, University of Washington, Seattle 98195.
Nature
|August 20, 1992
概括
高分辨率光学成像绘制在和认知任务期间的人类大脑活动的地图. 这种技术揭示了感觉,运动和语言皮层的功能组织,为研究提供了新的可能性.
科学领域:
- 神经科学是一个神经科学.
- 光学成像技术的成像
- 人类大脑活动人类大脑活动
背景情况:
- 光学成像成功地绘制了动物感官皮层中的功能活动.
- 内在的光学信号虽然比神经活动慢,但与最大的神经输出相关.
- 光学信号的潜在来源包括离子电流,氧气输送和血液体积变化.
研究的目的:
- 适应高分辨率光学成像用于绘制人类皮质活动的地图.
- 为了研究在刺激引起的形下降后的功能组织.
- 探索人类大脑中的认知过程和感官运动功能.
主要方法:
- 在人类皮质上利用了内在的光学成像技术.
- 在诱导性形放电后记录的光学信号.
- 在感官刺激 (舌头运动) 和认知任务 (命名练习) 中测量了光学变化.
主要成果:
- 光学信号的大小与后放电的强度和持续时间相关.
- 周围区域的相反光学变化表明一种抑制性神经环境.
- 在运动任务期间在感官皮层和在认知任务期间在语言区域检测到重要的光学变化.
结论:
- 高分辨率光学成像可以适应研究人类皮质功能.
- 这种技术为感觉,运动和语言皮层的组织提供了新的见解.
- 为研究人类认知过程和神经活动提供了一个新的工具.
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