Bonaiuto James, Arbib Michael A
University of Southern California, Hedco Neuroscience Building, 120E, Room 10B, Mailing Code 2520, 3641 Watt Way, Los Angeles, CA, 90089-2520, USA.
Biol Cybern. 2010 Apr;102(4):341-59. doi: 10.1007/s00422-010-0371-0. Epub 2010 Mar 9.
A mirror system is active both when an animal executes a class of actions (self-actions) and when it sees another execute an action of that class. Much attention has been given to the possible roles of mirror systems in responding to the actions of others but there has been little attention paid to their role in self-actions. In the companion article (Bonaiuto et al. Biol Cybern 96:9-38, 2007) we presented MNS2, an extension of the Mirror Neuron System model of the monkey mirror system trained to recognize the external appearance of its own actions as a basis for recognizing the actions of other animals when they perform similar actions. Here we further extend the study of the mirror system by introducing the novel hypotheses that a mirror system may additionally help in monitoring the success of a self-action and may also be activated by recognition of one's own apparent actions as well as efference copy from one's intended actions. The framework for this computational demonstration is a model of action sequencing, called augmented competitive queuing, in which action choice is based on the desirability of executable actions. We show how this "what did I just do?" function of mirror neurons can contribute to the learning of both executability and desirability which in certain cases supports rapid reorganization of motor programs in the face of disruptions.
当动物执行某类动作（自身动作）时以及当它看到另一个体执行该类动作时，镜像系统都会被激活。人们对镜像系统在对其他个体动作做出反应方面的可能作用给予了很多关注，但对其在自身动作中的作用却很少关注。在配套文章（博纳尤托等人，《生物控制论》96:9 - 38，2007年）中，我们提出了MNS2，这是对猴子镜像系统的镜像神经元系统模型的扩展，经过训练以识别自身动作的外部表现，作为识别其他动物执行类似动作时的动作基础。在此，我们通过引入新的假设进一步扩展对镜像系统的研究，即镜像系统可能还有助于监测自身动作的成功情况，并且可能还会因识别自身明显的动作以及预期动作的传出副本而被激活。这个计算演示的框架是一个动作序列模型，称为增强竞争排队，其中动作选择基于可执行动作的合意性。我们展示了镜像神经元的这种“我刚做了什么？”功能如何有助于可执行性和合意性的学习，在某些情况下，这支持在面对干扰时运动程序的快速重组。
