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論文
- タイトル
- タイトル（英）
- Cerebral cortical processing time is elongated in human brain evolution
- 参照URL
- https://researchmap.jp/Masafumi_Nejime/published_papers/36239696
- 著者
- 著者（英）
- Kosuke Itoh,Naho Konoike,Masafumi Nejime,Haruhiko Iwaoki,Hironaka Igarashi,Satoshi Hirata,Katsuki Nakamura
- 担当区分
- 概要
- 概要（英）
- <title>Abstract</title>An increase in number of neurons is presumed to underlie the enhancement of cognitive abilities in brain evolution. The evolution of human cognition is then expected to have accompanied a prolongation of net neural-processing time due to the accumulation of processing time of individual neurons over an expanded number of neurons. Here, we confirmed this prediction and quantified the amount of prolongation in vivo, using noninvasive measurements of brain responses to sounds in unanesthetized human and nonhuman primates. Latencies of the N1 component of auditory-evoked potentials recorded from the scalp were approximately 40, 50, 60, and 100 ms for the common marmoset, rhesus monkey, chimpanzee, and human, respectively. Importantly, the prominent increase in human N1 latency could not be explained by the physical lengthening of the auditory pathway, and therefore reflected an extended dwell time for auditory cortical processing. A longer time window for auditory cortical processing is advantageous for analyzing time-varying acoustic stimuli, such as those important for speech perception. A novel hypothesis concerning human brain evolution then emerges: the increase in cortical neuronal number widened the timescale of sensory cortical processing, the benefits of which outweighed the disadvantage of slow cognition and reaction.
- 出版者・発行元
- 出版者・発行元（英）
- Springer Science and Business Media LLC
- 誌名
- 誌名（英）
- Scientific Reports
- 巻
- 12
- 号
- 1
- 開始ページ
- 1103
- 終了ページ
- 出版年月
- 2022年1月
- 査読の有無
- 査読有り
- 招待の有無
- 掲載種別
- 研究論文（学術雑誌）
- ISSN
- DOI URL
- https://doi.org/10.1038/s41598-022-05053-w
- 共同研究・競争的資金等の研究課題
研究者
禰占 雅史
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