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Memory-matches evoke human gamma-responses

机译：记忆匹配唤起人类的伽马反应

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Background Human brain activity in the gamma frequency range has been shown to be a correlate of numerous cognitive functions like attention, perception and memory access. More specifically, gamma activity has been found to be enhanced when stimuli are stored in or match with short-term memory (STM). We tested the hypothesis that gamma activity is also evoked when stimuli match representations in long-term-memory (LTM). EEG was recorded from 13 subjects performing a choice reaction task. Visual stimuli were either known real-world objects with a memory representation or novel configurations never seen before. Results All stimuli evoked an early gamma response which was maximal over occipital electrodes. This evoked gamma activity was significantly larger for items that matched memory templates. Conclusions Therefore, we argue that gamma activity results from the feedback from memory into perception systems. This assumption seems to be true for STM as well as LTM.
机译：背景技术人类大脑在伽马频率范围内的活动已被证明与许多认知功能（如注意力，知觉和记忆访问）相关。更具体地，发现当刺激被存储在短期记忆（STM）中或与之匹配时，伽马活性被增强。我们测试了这样的假设：当刺激与长期记忆（LTM）中的表示匹配时，伽马活性也会引起。从执行选择反应任务的13位受试者中记录了EEG。视觉刺激要么是已知的具有记忆表示的现实世界对象，要么是前所未有的新颖配置。结果所有刺激均引起早期的伽马反应，在枕电极上最大。对于与内存模板匹配的项目，这种诱发的伽马活动明显更大。结论因此，我们认为伽马活动是从记忆到感知系统的反馈产生的。这个假设对于STM和LTM似乎都是正确的。

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