how frontoparietal brain regions mediate imitative and complementary actions an fmri studyfrontoparietal大脑区域如何调解模仿一项功能磁共振成像研究和补充措施.pdfVIP

How Frontoparietal Brain Regions Mediate Imitative and Complementary Actions: An fMRI Study 1 1 1,2 Brenda Ocampo *, Ada Kritikos , Ross Cunnington 1 School of Psychology, The University of Queensland, St Lucia, Australia, 2 Queensland Brain Institute, The University of Queensland, St Lucia, Australia Abstract The ‘mirror neuron system’ (MNS), located within inferior parietal lobe (IPL) and inferior frontal gyrus (IFG), creates an internal motor representation of the actions we see and has been implicated in imitation. Recently, the MNS has been implicated in non-identical responses: when the actions we must execute do not match those that we observe. However, in such conflicting situations non action-specific cognitive control networks also located in frontoparietal regions may be involved. In the present functional magnetic resonance imaging (fMRI) study participants made both similar and dissimilar actions within two action contexts: imitative and complementary. We aimed to determine whether activity within IPL/IFG depends on (i) responding under an imitative versus complementary context (ii) responding with similar versus dissimilar responses, and (iii) observing hand actions versus symbolic arrow cue stimuli. Activity within rIPL/rIFG regions was largest during observation of hand actions compared with arrow cues. Specifically, rIPL/rIFG were recruited only during the imitative context, when participants responded with similar actions. When responding to symbolic arrow cues, rIPL/rIFG activity increased during dissimilar responses, reflecting increased demands placed on general cognitive control mechanisms. These results suggest a specific role of rIPL/rIFG during imitation of hand actions, an