Mather George, Battaglini Luca, Campana Gianluca
School of Psychology, University of Lincoln, Brayford Pool, Lincoln LN2 1NB, UK.
Department of General Psychology, University of Padova, Via Venezia 8, 35131 Padova, Italy.
Neuropsychologia. 2016 Apr;84:193-7. doi: 10.1016/j.neuropsychologia.2016.02.015. Epub 2016 Feb 23.
The perception of human movement is a key component of daily social interactions. Although extrastriate area MT+/V5 is closely associated with motion processing, its role in the processing of sparse 'biological motion' displays is still unclear. We developed two closed matched psychophysical tasks to assess simple coherent motion perception and biological motion perception, and measured changes in performance caused by application of TMS over MT+/V5. Performance of the simple motion discrimination task was significantly depressed by TMS stimulation, and highly correlated within observers in TMS conditions, but there was no significant decrement in performance of the biological motion task, despite low intra-observer correlations across TMS conditions. We conclude that extrastriate area MT+/V5 is an obligatory waypoint in the neural processing of simple coherent motion, but is not obligatory for the processing of biological motion. Results are consistent with a dual neural processing route for biological motion processing.
对人类运动的感知是日常社交互动的关键组成部分。尽管纹外区域MT+/V5与运动处理密切相关，但其在稀疏“生物运动”显示处理中的作用仍不清楚。我们开发了两项紧密匹配的心理物理学任务来评估简单连贯运动感知和生物运动感知，并测量了经颅磁刺激（TMS）作用于MT+/V5时性能的变化。简单运动辨别任务的性能在TMS刺激下显著降低，并且在TMS条件下观察者之间高度相关，但尽管在TMS条件下观察者内部的相关性较低，生物运动任务的性能并没有显著下降。我们得出结论，纹外区域MT+/V5是简单连贯运动神经处理中的一个必经点，但对于生物运动的处理并非必需。结果与生物运动处理的双重神经处理途径一致。
