Hamm Jeff P, Crawford Trevor J, Nebl Helmut, Kean Matthew, Williams Steven C R, Ettinger Ulrich
Cognitive Neuroscience Research Group, School of Psychology, The University of Auckland, Auckland, New Zealand.
Centres for Aging Research & Human Learning and Development, Department of Psychology, Lancaster University, Lancaster, United Kingdom.
PLoS One. 2014 Jan 27;9(1):e87595. doi: 10.1371/journal.pone.0087595. eCollection 2014.
Illusory line motion (ILM) refers to a motion illusion in which a flash at one end of a bar prior to the bar's instantaneous presentation or removal results in the percept of motion. While some theories attribute the origin of ILM to attention or early perceptual mechanisms, others have proposed that ILM results from impletion mechanisms that reinterpret the static bar as one in motion. The current functional magnetic resonance imaging study examined participants while they made decisions about the direction of motion in which a bar appeared to be removed. Preceding the instantaneous removal of the bar with a flash at one end resulted in a motion percept away from the flash. If this flash and the bar's removal overlapped in time, it appeared that the bar was removed towards the flash (reverse ILM). Independent of the motion type, brain responses indicated activations in areas associated with motion (MT+), endogenous and exogenous attention (intraparietal sulcus, frontal eye fields, and ventral frontal cortex), and response selection (ACC). ILM was associated with lower percept scores and higher activations in ACC relative to real motion, but no differences in shape-selective areas emerged. This pattern of brain activation is consistent with the attentional gradient model or bottom-up accounts of ILM in preference to impletion.
虚幻线条运动（ILM）指的是一种运动错觉，即在一条线条瞬间呈现或消失之前，其一端出现的闪光会导致运动感知。虽然一些理论将ILM的起源归因于注意力或早期感知机制，但也有人提出ILM是由充盈机制导致的，该机制将静态线条重新解释为处于运动中的线条。当前的功能磁共振成像研究在参与者判断线条似乎被移除的运动方向时对他们进行了检测。在线条瞬间移除之前，在其一端用闪光进行提示会导致远离闪光的运动感知。如果这个闪光与线条的移除在时间上重叠，那么看起来线条是朝着闪光的方向被移除（反向ILM）。与运动类型无关，大脑反应表明与运动相关的区域（MT+）、内源性和外源性注意力（顶内沟、额叶眼区和腹侧额叶皮质）以及反应选择（ACC）出现了激活。与真实运动相比，ILM与较低的感知分数以及ACC中更高的激活相关，但在形状选择性区域未出现差异。这种大脑激活模式与注意力梯度模型或ILM的自下而上解释一致，而不是充盈解释。
