Desimone R
Laboratory of Neuropsychology, NIMH, Bethesda, MD 20892-4415, USA.
Philos Trans R Soc Lond B Biol Sci. 1998 Aug 29;353(1373):1245-55. doi: 10.1098/rstb.1998.0280.
According to conventional neurobiological accounts of visual attention, attention serves to enhance extrastriate neuronal responses to a stimulus at one spatial location in the visual field. However, recent results from recordings in extrastriate cortex of monkeys suggest that any enhancing effect of attention is best understood in the context of competitive interactions among neurons representing all of the stimuli present in the visual field. These interactions can be biased in favour of behaviourally relevant stimuli as a result of many different processes, both spatial and non-spatial, and both bottom-up and top-down. The resolution of this competition results in the suppression of the neuronal representations of behaviourally irrelevant stimuli in extrastriate cortex. A main source of top-down influence may derive from neuronal systems underlying working memory.
根据传统的视觉注意力神经生物学观点，注意力有助于增强视皮层外神经元对视野中某一空间位置的刺激的反应。然而，最近对猴子视皮层外区域的记录结果表明，注意力的任何增强作用最好在代表视野中所有存在的刺激的神经元之间的竞争性相互作用的背景下理解。由于许多不同的过程，包括空间和非空间的，以及自下而上和自上而下的过程，这些相互作用可能偏向于行为相关的刺激。这种竞争的解决导致视皮层外区域中行为无关刺激的神经元表征被抑制。自上而下影响的一个主要来源可能来自工作记忆背后的神经元系统。
