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Cogn Process. 2007 Sep;8(3):159-66. Epub 2007 Apr 12.

Predictive coding: an account of the mirror neuron system.

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The Wellcome Trust Centre for Neuroimaging, Institute of Neurology, 12 Queen Square, WC1N 3BG, London, UK.


Is it possible to understand the intentions of other people by simply observing their actions? Many believe that this ability is made possible by the brain's mirror neuron system through its direct link between action and observation. However, precisely how intentions can be inferred through action observation has provoked much debate. Here we suggest that the function of the mirror system can be understood within a predictive coding framework that appeals to the statistical approach known as empirical Bayes. Within this scheme the most likely cause of an observed action can be inferred by minimizing the prediction error at all levels of the cortical hierarchy that are engaged during action observation. This account identifies a precise role for the mirror system in our ability to infer intentions from actions and provides the outline of the underlying computational mechanisms.

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