Perceptual demand modulates activation of human auditory cortex in response to task-irrelevant sounds.
Perceptual demand modulates activation of human auditory cortex in response to task-irrelevant sounds.
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DOI：
10.1162/jocn_a_00416
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发表时间：
2013-09
影响因子：
3.2
通讯作者：
Liebenthal E
中科院分区：
文献类型：
--
作者：
Sabri M;Humphries C;Verber M;Mangalathu J;Desai A;Binder JR;Liebenthal E
在视觉模态中，对目标导向任务的感知需求已被证明可以调节在加工的感觉-知觉阶段忽略无关信息的程度。在听觉模态中，知觉需求对任务无关声音的神经表征的影响尚不清楚。我们比较了在二元聆听范式下，在参数调节的知觉任务需求中与任务无关声音相关的同时事件相关电位（ERP）和功能磁共振成像（fMRI）反应。参与者在一只耳朵（注意耳朵）执行信号检测任务，而忽略另一只耳朵（忽略耳朵）中与任务无关的音节。结果表明，刺激开始后130 ~ 230 ms，听觉知觉需求在颞上回中左感兴趣区域和负ERP活动中调节音节加工。增加侧耳的知觉需求与fMRI和ERP对任务无关声音的神经反应减少有关。这些发现支持一种选择模型，即持续的感知需求调节听觉皮层中与任务无关的声音处理。
In the visual modality, perceptual demand on a goal-directed task have been shown to modulate the extent to which irrelevant information can be disregarded at a sensory-perceptual stage of processing. In the auditory modality the effect of perceptual demand on neural representations of task-irrelevant sounds is unclear. We compared simultaneous event-related potentials (ERP) and functional magnetic resonance imaging (fMRI) responses associated with task-irrelevant sounds across parametrically modulated perceptual task demands in a dichotic-listening paradigm. Participants performed a signal detection task in one ear (Attend ear) while ignoring task-irrelevant syllable sounds in the other ear (Ignore ear). Results revealed modulation of syllable processing by auditory perceptual demand in a region of interest in middle left superior temporal gyrus and in negative ERP activity 130–230 ms post stimulus onset. Increasing the perceptual demand in the Attend ear was associated with a reduced neural response in both fMRI and ERP to task-irrelevant sounds. These findings are in support of a selection model whereby ongoing perceptual demands modulate task-irrelevant sound processing in auditory cortex.
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影响因子：
2.4
作者：
CHERRY, EC
通讯作者：
CHERRY, EC
影响因子：
4.1
作者：
DARK, VJ;JOHNSTON, WA;FARAH, MJ
通讯作者：
FARAH, MJ
DOI：
10.1016/s0926-6410(02)00061-7
发表时间：
2002-06-01
期刊：
COGNITIVE BRAIN RESEARCH
影响因子：
--
作者：
Berman, RA;Colby, CL
通讯作者：
Colby, CL
影响因子：
56.9
作者：
de Fockert, JW;Rees, G;Lavie, N
通讯作者：
Lavie, N
影响因子：
64.8
作者：
Duncan, J;Martens, S;Ward, R
通讯作者：
Ward, R