aLaboratory of Cognitive Neuroscience (LNC), CNRS, Aix Marseille Univ, FR3C, Marseille, France

bDepartment of Biomedical Engineering

cDepartment of Otolaryngology-Head and Neck Surgery

dDepartment of Neuroscience

eKavli Neuroscience Discovery Institute, Johns Hopkins University, Baltimore, Maryland, USA

Correspondence to Dr Christophe Lopez, Laboratoire de Neurosciences Cognitives – UMR 7291, Aix Marseille Univ & Centre National de la Recherche Scientifique (CNRS), Centre Saint-Charles, Fédération de Recherche 3C – Case B. 3, Place Victor Hugo. 13331 Marseille Cedex 03, France. Tel: +33 4 13 55 08 41; fax: +33 4 13 55 08 44; e-mail: [email protected]