Western Washington University, Washington 98225, USA.
Neuroimage. 2012 Nov 1;63(2):687-97. doi: 10.1016/j.neuroimage.2012.07.010. Epub 2012 Jul 14.
Theories proposing a bidirectional influence between action and perception are well supported by behavioral findings. In contrast to the growing literature investigating the brain mechanisms by which perception influences action, there is a relative dearth of neural evidence documenting how action may influence perception. Here we show that action priming of apparent motion perception is associated with increased functional connectivity between dorsal cortical regions connecting vision with action. Participants manually rotated a joystick in a clockwise or counter-clockwise direction while viewing ambiguous apparent rotational motion. Actions influenced perception when the perceived direction of the ambiguous display was the same as manual rotation. For comparison, participants also rotated the joystick while viewing non-ambiguous apparent motion and in the absence of apparent motion. In a final control condition, participants viewed ambiguous apparent motion without manual rotation. Actions influence on perception was accompanied by a significant increase in alpha and beta band event related desynchronization (ERD) in contralateral primary motor cortex, superior parietal lobe and middle occipital gyrus. Increased ERD across these areas was accompanied by an increase in gamma band phase locking between primary motor, parietal, striate and extrastriate regions. Similar patterns were not observed when action was compatible with perception, but did not influence it. These data demonstrate that action influences perception by strengthening the interaction across a broad sensorimotor network for the putative purpose of integrating compatible action outcomes and sensory information into a single coherent percept.
理论上提出了动作和感知之间的双向影响，这一理论得到了行为研究的很好支持。与越来越多的研究感知如何影响动作的大脑机制的文献相比，关于动作如何影响感知的神经证据相对较少。在这里，我们表明，明显运动知觉的动作启动与连接视觉和动作的背侧皮质区域之间的功能连接增加有关。参与者在观看模糊的旋转运动时，顺时针或逆时针方向手动旋转操纵杆。当感知的显示方向与手动旋转方向相同时，动作会影响感知。为了比较，参与者还在观看非模糊的明显运动和没有明显运动的情况下旋转操纵杆。在最后一个对照条件下，参与者在没有手动旋转的情况下观看模糊的明显运动。当动作影响感知时，对侧初级运动皮层、顶叶上回和中枕叶的 alpha 和 beta 波段事件相关去同步（ERD）显著增加。这些区域的 ERD 增加伴随着初级运动、顶叶、纹状和纹外区域之间的 gamma 波段相位锁定增加。当动作与感知兼容但不影响感知时，没有观察到类似的模式。这些数据表明，动作通过加强一个广泛的感觉运动网络之间的相互作用来影响感知，其目的是将兼容的动作结果和感觉信息整合到一个单一的连贯感知中。
