Dissociation of fMRI activation and awareness in auditory perception task
Dissociation of fMRI activation and awareness in auditory perception task
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DOI：
10.1016/s0926-6410(99)00015-4
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发表时间：
1999-10-25
期刊：
影响因子：
--
通讯作者：
Tanenbaum, L
中科院分区：
文献类型：
--
作者：
Colder, BW;Tanenbaum, L
为了研究感觉皮层的活动与感觉刺激体验之间的关系，对受试者进行了颞叶皮层的功能磁共振成像（fMRI），同时受试者表示他们对语音和噪声的感知。听觉皮层激活被发现减少刺激显着性。在听觉阈值附近的强度水平的语音刺激产生显着的激活颞叶皮层，即使受试者没有报告的刺激感知。同时记录的神经生理学和心理物理学测量之间的这些分离表明，刺激诱发的皮质活动并不一定会产生有意识的感知。(C)1999 Elsevier Science B.V.保留所有权利。
To investigate the relationship between activity in sensory cortex, and the experience of sensory stimuli, functional magnetic resonance imaging (fMRI) of temporal cortex was performed while subjects indicated their perception of speech sounds combined with noise. Auditory cortex activation was found to decrease with decreasing stimulus saliency. Speech stimuli presented at an intensity level near auditory threshold produced significant activation in temporal cortex even when subjects did not report perception of stimuli. These dissociations between simultaneously recorded neurophysiological and psychophysical measures suggest that stimulus-evoked cortical activity does not necessarily produce conscious perception. (C) 1999 Elsevier Science B.V. Ail rights reserved.