Matsuyoshi Daisuke, Hirose Nobuyuki, Mima Tatsuya, Fukuyama Hidenao, Osaka Naoyuki
Department of Psychology, Graduate School of Letters, Kyoto University, Yoshida-honmachi, Sakyo, Kyoto 606-8501, Japan.
Neurosci Lett. 2007 Dec 18;429(2-3):131-5. doi: 10.1016/j.neulet.2007.10.002. Epub 2007 Oct 18.
We investigated the effects of repetitive transcranial magnetic stimulation (rTMS) over the human cerebral cortex on apparent motion perception. Previous studies have shown that human extrastriate visual area MT+ (V5) processes not only real but also apparent motion. However, the functional relevance of MT+ on long-range apparent motion perception remains unclear. Here, we show direct evidence for the involvement of MT+ in apparent motion perception using rTMS, which is known to temporarily inhibit a localized region in the cerebral cortex. The results showed that apparent motion perception decreased after applying rTMS over MT+, but not after applying rTMS over the control region (inferior temporal gyrus). The decrease in performance caused by applying rTMS to MT+ suggests that MT+ is a causally responsible region for apparent motion perception, and thus, further supports the idea that MT+ plays a major role in the perception of motion.
我们研究了经颅重复磁刺激（rTMS）作用于人类大脑皮层对似动知觉的影响。先前的研究表明，人类纹外视觉区域MT+（V5）不仅处理真实运动，也处理似动。然而，MT+在远距离似动知觉中的功能相关性仍不清楚。在此，我们使用rTMS展示了MT+参与似动知觉的直接证据，rTMS已知可暂时抑制大脑皮层中的局部区域。结果显示，在MT+上方施加rTMS后似动知觉下降，但在对照区域（颞下回）上方施加rTMS后则没有下降。对MT+施加rTMS导致的表现下降表明，MT+是似动知觉的因果责任区域，因此，进一步支持了MT+在运动知觉中起主要作用的观点。
