注意力在视觉处理中的作用。
The role of attention in visual processing.
作者信息
Maunsell John H R, Cook Erik P
机构信息
Howard Hughes Medical Institute and Division of Neuroscience, Baylor College of Medicine, One Baylor Plaza, S-603, Houston, TX 77030, USA.
出版信息
Philos Trans R Soc Lond B Biol Sci. 2002 Aug 29;357(1424):1063-72. doi: 10.1098/rstb.2002.1107.
Attention to a visual stimulus typically increases the responses of cortical neurons to that stimulus. Because many studies have shown a close relationship between the performance of individual neurons and behavioural performance of animal subjects, it is important to consider how attention affects this relationship. Measurements of behavioural and neuronal performance taken from rhesus monkeys while they performed a motion detection task with two attentional states show that attention alters the relationship between behaviour and neuronal response. Notably, attention affects the relationship differently in different cortical visual areas. This indicates that a close relationship between neuronal and behavioural performance on a given task persists over changes in attentional state only within limited regions of visual cortex.
对视觉刺激的注意通常会增强皮层神经元对该刺激的反应。由于许多研究表明单个神经元的表现与动物受试者的行为表现之间存在密切关系，因此考虑注意力如何影响这种关系很重要。在恒河猴执行具有两种注意力状态的运动检测任务时，对其行为和神经元表现进行的测量表明，注意力会改变行为与神经元反应之间的关系。值得注意的是，注意力在不同的皮层视觉区域对这种关系的影响有所不同。这表明，在给定任务上，神经元和行为表现之间的密切关系仅在视觉皮层的有限区域内，在注意力状态变化时仍然存在。
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