Year: 2020
Type: report
Abstract: 研究成果の概要（和文）：本研究は、外界の認知や行動制御に不可欠な時間情報処理の神経基盤を、神経細胞活動レベルで解明することを目的とした。視覚刺激の時間知覚と運動待機中の時間生成との二つの時間計測過程を含む行動課題を開発し、課題遂行中のサルの前頭連合野の神経細胞活動を記録した。その結果、異なる神経細胞群が、それぞれ視覚刺激の呈示期間と運動待機期間とに、時間計測に関連する活動を呈することを見出した。この結果は、時間知覚と時間生成とで異なる神経機構が関わることを示唆する。研究成果の概要（英文）：Interval timing is vitally important in sensory perception and motor control. In the research on interval timing, it has not been clarified whether duration perception and interval generation share a common neuronal mechanism. To investigate the possible shared neuronal mechanism, neuronal activity was recorded from monkey prefrontal cortex (PFC) during the task in which subjects estimated durations of a visual stimulus and produced intervals indicated by the duration of the visual stimulus in motor preparation. A group of PFC neurons exhibited timing-related activity during the stimulus presentation period when the subjects measured and judged stimulus duration. Another group of neurons showed build-up activity during the movement retention period when the subjects produced an interval for the movement start. These results suggest that different neuronal mechanisms might work for the duration perception of visual stimulus and for the interval generation in motor preparation in PFC.
Author: 稲瀬, 正彦
Language: Japanese
Subfield: Cognitive Neuroscience
Field: Neuroscience
Domain: Life Sciences
Open Access status: green
OpenAlex ID: W7145912258