[1] CHU Timone, Assistance Publ Hop Marseille, Serv Cent Biophys & Med Nucl, 264 Rue St Pierre, F-13385 Marseille 5, France
[2] CNRS, UMR 5549, Ctr Rech Cerveau & Cognit, Toulouse, France
[3] Univ Toulouse 3, F-31062 Toulouse, France
[4] INSERM, APHM, Serv Neurol & Neuropsychol, F-13258 Marseille, France
[5] INSERM, U751, Lab Neurophysiol & Neuropsychol, F-13258 Marseille, France