研究人員要求41名為了準(zhǔn)備外科手術(shù)而在大腦中植入電極的癲癇癥患者,,觀看在一臺(tái)電腦顯示器屏幕上閃爍的100幅有關(guān)人物、動(dòng)物,、風(fēng)景和物體的照片,。
通過對(duì)杏仁核和附近區(qū)域的1445個(gè)神經(jīng)細(xì)胞的響應(yīng)進(jìn)行分析后,美國(guó)帕薩迪納市加利福尼亞理工學(xué)院的Florian Mormann和同事日前在《自然—神經(jīng)科學(xué)》雜志上報(bào)告說,,右側(cè)的杏仁核(而非其他區(qū)域)所包含的神經(jīng)細(xì)胞能夠?qū)?dòng)物照片產(chǎn)生特別的響應(yīng),。
這些神經(jīng)細(xì)胞能夠?qū)?dòng)物而非人物(即便是年輕時(shí)候的布拉德·皮特也不行)作出響應(yīng),而不論這張照片拍攝的角度和距離如何,。
并且作為一個(gè)整體,,這些神經(jīng)細(xì)胞對(duì)任何種類的動(dòng)物都沒有表現(xiàn)出特別的偏好,無論是鳥類或是哺乳動(dòng)物,,危險(xiǎn)的動(dòng)物或是潛在的美味,。研究人員推測(cè),這些響應(yīng)反應(yīng)了作為捕食者和被捕食者的動(dòng)物在我們的進(jìn)化過程中的重要性,。(生物谷 Bioon.com)
doi:10.1038/nn.2899
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A category-specific response to animals in the right human amygdala
Florian Mormann,Julien Dubois, Simon Kornblith, Milica Milosavljevic, Moran Cerf,Matias Ison,Naotsugu Tsuchiya, Alexander Kraskov,Rodrigo Quian Quiroga,Ralph Adolphs,Itzhak Fried& Christof Koch
The amygdala is important in emotion, but it remains unknown whether it is specialized for certain stimulus categories. We analyzed responses recorded from 489 single neurons in the amygdalae of 41 neurosurgical patients and found a categorical selectivity for pictures of animals in the right amygdala. This selectivity appeared to be independent of emotional valence or arousal and may reflect the importance that animals held throughout our evolutionary past.