视觉处理速度随偏心率增加而提高。
Speed of visual processing increases with eccentricity.
作者信息
Carrasco Marisa, McElree Brian, Denisova Kristina, Giordano Anna Marie
机构信息
Department of Psychology New York University, 4 Washington Place, New York, New York 10003, USA.
Department of Neural Science, New York University, 4 Washington Place, New York, New York 10003, USA.
出版信息
Nat Neurosci. 2003 Jul;6(7):699-700. doi: 10.1038/nn1079.
The visual system has a duplex design to meet conflicting environmental demands: the fovea has the resolution required to process fine spatial information, but the periphery is more sensitive to temporal properties. To investigate whether the periphery's sensitivity is partly due to the speed with which information is processed, we measured the full timecourse of visual information processing by deriving joint measures of discriminability and speed, and found that speed of information processing varies with eccentricity: processing was faster when same-size stimuli appeared at 9 degrees than 4 degrees eccentricity, and this difference was attenuated when the 9 degrees stimuli were magnified to equate cortical representation size. At the same eccentricity, larger stimuli are processed more slowly. These temporal differences are greater than expected from neurophysiological constraints.
视觉系统具有双重设计以满足相互冲突的环境需求
中央凹具有处理精细空间信息所需的分辨率，但外周对时间特性更敏感。为了研究外周的敏感性是否部分归因于信息处理的速度，我们通过推导可辨别性和速度的联合测量值来测量视觉信息处理的完整时间进程，发现信息处理速度随离心率而变化：当相同大小的刺激出现在9度而非4度离心率时，处理速度更快，并且当9度刺激被放大以等同于皮质表征大小时，这种差异会减弱。在相同离心率下，较大的刺激处理得更慢。这些时间差异大于神经生理学限制所预期的。
Zotero 插件