Harvey Benjamin M, Braddick Oliver J
Department of Experimental Psychology, Utrecht University, The Netherlands.
Vision Res. 2011 Mar 2;51(5):479-88. doi: 10.1016/j.visres.2011.01.002. Epub 2011 Jan 9.
Here we examine adaptation effects on pattern detection and position discrimination tasks in radial and rotational motion patterns, induced by adapting stimuli moving in the same or opposite directions to the test stimuli. Adaptation effects on the two tasks were similar, suggesting these tasks are performed by the same population of neurons. Global motion specific adaptation was then induced by presenting adaptation stimuli and test stimuli in different parts of the visual field. Again, adaptation effects on the two tasks were similar, but neither same-direction nor opposite-direction motion produced any adaptation effect on contracting motion patterns. Finally, adaptation stimuli were compared that should have similar effects on local motion processing neurons, but different effects on global motion processing neurons. Again, adaptation effects on the two tasks were similar. However, when global-level adaptation was avoided, no adaptation effects were seen with adaptation patterns moving in the opposite direction to the test pattern. Together, these last two experiments suggest that adaptation to opposite directions of motion from the test motion affects global motion processing but not local motion processing neurons.
在此，我们研究了由与测试刺激同向或反向移动的适应刺激所诱发的，对径向和旋转运动模式中的模式检测和位置辨别任务的适应效应。对这两项任务的适应效应相似，表明这些任务由同一群神经元执行。然后，通过在视野的不同部分呈现适应刺激和测试刺激来诱发全局运动特异性适应。同样，对这两项任务的适应效应相似，但同向和反向运动对收缩运动模式均未产生任何适应效应。最后，比较了对局部运动处理神经元应具有相似效应，但对全局运动处理神经元具有不同效应的适应刺激。同样，对这两项任务的适应效应相似。然而，当避免全局水平的适应时，与测试模式反向移动的适应模式未观察到适应效应。这最后两个实验共同表明，与测试运动相反方向的运动适应会影响全局运动处理，但不会影响局部运动处理神经元。
