Baseline shifts do not predict attentional modulation of target processing during feature-based visual attention.
Baseline shifts do not predict attentional modulation of target processing during feature-based visual attention.
复制标题
DOI：
10.3389/neuro.09.007.2007
复制
发表时间：
2007
影响因子：
2.9
通讯作者：
Mangun GR
中科院分区：
文献类型：
--
作者：
Fannon SP;Saron CD;Mangun GR
已经观察到将选择性注意力引导到空间位置的线索增加了代表待关注刺激位置的视觉区域中的基线神经活动。类似的注意力相关的基线偏移也被观察到响应于非空间刺激特征的注意力引导线索。有人提出，基线偏移与预备注意力可能作为注意力调节后续视觉目标，匹配出席的位置或功能的反应的机制。使用功能磁共振成像，我们本地化的颜色和运动敏感的视觉领域在个别科目和线索诱导的基线偏移和随后的注意力调制任务相关的目标刺激之间的关系进行了调查。虽然注意力导向线索往往导致增加背景神经活动的功能特定的视觉区域，这些增加与任务中的行为或随后的注意力调节的视觉目标。这些发现质疑的假设，即注意相关的基线神经活动的变化，在基于特征的选择性注意过程中的视觉目标的选择性感觉处理。
Cues that direct selective attention to a spatial location have been observed to increase baseline neural activity in visual areas that represent a to-be-attended stimulus location. Analogous attention-related baseline shifts have also been observed in response to attention-directing cues for non-spatial stimulus features. It has been proposed that baseline shifts with preparatory attention may serve as the mechanism by which attention modulates the responses to subsequent visual targets that match the attended location or feature. Using functional MRI, we localized color- and motion-sensitive visual areas in individual subjects and investigated the relationship between cue-induced baseline shifts and the subsequent attentional modulation of task-relevant target stimuli. Although attention-directing cues often led to increased background neural activity in feature specific visual areas, these increases were not correlated with either behavior in the task or subsequent attentional modulation of the visual targets. These findings cast doubt on the hypothesis that attention-related shifts in baseline neural activity result in selective sensory processing of visual targets during feature-based selective attention.
登录
查看更多内容
影响因子：
2.5
作者：
DESIMONE, R;SCHEIN, SJ
通讯作者：
SCHEIN, SJ
影响因子：
2
作者：
Foxe, JJ;Simpson, GV;Saron, CD
通讯作者：
Saron, CD
影响因子：
1.9
作者：
Britten, KH;Newsome, WT;Movshon, JA
通讯作者：
Movshon, JA
影响因子：
2
作者：
HAENNY, PE;MAUNSELL, JHR;SCHILLER, PH
通讯作者：
SCHILLER, PH
影响因子：
2.9
作者：
Giesbrecht, B;Weissman, DH;Manqun, GR
通讯作者：
Manqun, GR