Behavioral and Brain Sciences

Author's Response

The mirror system hypothesis stands but the framework is much enriched

Michael A. Arbib a1
a1 Computer Science Department, Neuroscience Program and USC Brain Project, University of Southern California, Los Angeles, CA 90089-2520


Challenges for extending the mirror system hypothesis include mechanisms supporting planning, conversation, motivation, theory of mind, and prosody. Modeling remains relevant. Co-speech gestures show how manual gesture and speech intertwine, but more attention is needed to the auditory system and phonology. The holophrastic view of protolanguage is debated, along with semantics and the cultural basis of grammars. Anatomically separated regions may share an evolutionary history.