COGNITIVE NEUROSCIENCE AND NEUROPSYCHOLOGYShared neural correlates for language and tool use in Broca's areaHiguchi, Satomia; Chaminade, Thierryb; Imamizu, Hiroshia c; Kawato, MitsuoaAuthor Information aATR Computational Neuroscience Laboratories, Kyoto, Japan bInstitut de Neurosciences Cognitives de la Méditerranée, CNRS-Université de la Méditerranée, Marseille, France cNational Institute of Information and Communications Technology (NICT), Japan Correspondence to Thierry Chaminade, Institut de Neurosciences Cognitives de la Méditerranée, INCM UMR 6193 CNRS-Université de la Méditerranée, 31 Chemin Joseph Aiguier, 13402 Marseille Cedex 20, France Tel: +33 4 91 16 45 38; fax: +33 4 91 16 44 98; e-mail: firstname.lastname@example.org Satomi Higuchi and Thierry Chaminade contributed equally to this study Received 11 June 2009 accepted 28 July 2009 NeuroReport: October 7th, 2009 - Volume 20 - Issue 15 - p 1376-1381 doi: 10.1097/WNR.0b013e3283315570 Buy SDC Metrics Abstract Functional MRI was used to test predictions from a theory of the origin of human language. The gradual theory suggests that human language and tool-use skills have a similar hierarchical structure, and proposes that tool-manipulation skills are related to the origin and evolution of human language. Our results show an overlap of brain activity for perceiving language and using tools in Broca's area. The location of this overlap suggests that language and tool use share computational principles for processing complex hierarchical structures common to these two abilities. The involvement of monkeys' homologous region during tool use suggests that neural processes for computation of complex hierarchical structures exist in primates without language, and could have been exapted to support human grammatical ability. © 2009 Lippincott Williams & Wilkins, Inc.