Guenther Benjamin A, Brown James M
Department of Psychology, University of Georgia, Athens, GA, United States.
Vision Res. 2012 May 1;60:28-33. doi: 10.1016/j.visres.2012.03.004. Epub 2012 Mar 21.
A recent study illustrating the importance of sensory influences on inhibition of return (IOR) found stimuli biased towards the parvocellular (P) pathway produced greater IOR while stimuli biased towards the magnocellular (M) pathway produced less IOR (Brown, 2009; Guenther & Brown, 2007). The present study used a different sensory manipulation (temporal onset/offset) to further explore this relationship. Greater M activity was expected when stimuli were presented abruptly (M-biased) compared to when stimuli were ramped on and off (P-biased). Consistent with our recent findings, greater location-based IOR was found under ramped vs. abrupt conditions. The results showed location-based IOR is influenced by the nature of stimulus presentation (ramped vs. abrupt) providing convergent evidence of an IOR mechanism sensitive to M- and P-biased stimuli.
最近一项阐明感觉影响对返回抑制（IOR）重要性的研究发现，偏向于小细胞（P）通路的刺激产生更强的IOR，而偏向于大细胞（M）通路的刺激产生的IOR较弱（Brown，2009；Guenther & Brown，2007）。本研究采用了不同的感觉操纵（时间上的起始/结束）来进一步探究这种关系。与刺激以渐变方式开启和关闭（偏向P）相比，当刺激突然呈现（偏向M）时，预期会有更强的M活动。与我们最近的研究结果一致，在渐变与突然呈现条件下发现了更强的基于位置的IOR。结果表明，基于位置的IOR受刺激呈现性质（渐变与突然）的影响，为对偏向M和P的刺激敏感的IOR机制提供了趋同证据。
