Ogoshi S, Ogoshi Y, Momose S, Takezawa T, Mitsuhashi Y
Annu Int Conf IEEE Eng Med Biol Soc. 2013;2013:4310-3. doi: 10.1109/EMBC.2013.6610499.
Mu wave suppression is thought to accompany the activation of the mirror neuron system which occurs when a human observes or imitates the behavior of others. Our investigation indicates a possible difference in mirror neuron system activation between passive and more active observation as suggested by mu wave activation levels. Participants were asked to observe four different videos each 80 s in duration. Each video was repeated once after a 30 s interval. The first video was of visual white noise and participants were instructed to passively observe the video. This was identified as the Baseline condition and served as a mu activation level baseline. The second video was of simple bouncing balls and the observer was again asked to passively observe the video (Ball condition). The third video was of a moving hand (Observation condition). The forth video was of the same moving hand and participants also imagined executing the observed hand movement (Imagination condition). As hypothesized, the Imagination condition activated the greatest level of mu suppression, while the Ball condition activated the lowest level of mu wave suppression. The Observation condition produced a slightly larger level of mu wave suppression than the Ball condition. This progressive increase in mu wave suppression supports the hypothesis that the activation of the mirror neuron system increases as the level of active observation increases.
缪波抑制被认为与镜像神经元系统的激活相伴，当人类观察或模仿他人行为时，镜像神经元系统就会被激活。我们的研究表明，如缪波激活水平所示，在被动观察和更主动的观察之间，镜像神经元系统的激活可能存在差异。参与者被要求观看四个不同的视频，每个视频时长80秒。每个视频在间隔30秒后重复播放一次。第一个视频是视觉白噪声，要求参与者被动观看该视频。这被确定为基线条件，并作为缪波激活水平的基线。第二个视频是简单的弹跳球，同样要求观察者被动观看视频（球条件）。第三个视频是一只移动的手（观察条件）。第四个视频是同一只移动的手，参与者还要想象执行所观察到的手部动作（想象条件）。正如所假设的那样，想象条件激活了最大程度的缪波抑制，而球条件激活的缪波抑制水平最低。观察条件产生的缪波抑制水平比球条件略高。缪波抑制的这种逐渐增加支持了这样一种假设，即随着主动观察水平的提高，镜像神经元系统的激活也会增加。
