Chronic motor cortex stimulation in the treatment of central and neuropathic pain. Correlation between clinical, electrophysiological and anatomical data. - Nguyen,J.P.; Lefaucheur,J.P.; Decq,P.; Uchiyama,T.; Carpentier,A.; Fontaine,D.; Brugieres,P.; Pollin,B.; Feve,A.; Rostaing,S.; Cesaro,P.; Keravel,Y. (Pain, 1999)