[1] Univ Grenoble 1, Dept Neurosurg, INSERM, F-38043 Grenoble, France
[2] Univ Grenoble 1, Dept Clin & Biol Neurosci, INSERM, F-38043 Grenoble, France
[3] Univ Maine, Dept STAPS, F-72000 Le Mans, France
[4] Univ Kiel, Dept Neurol, D-24105 Kiel, Germany
[5] Inst Neurol, London WC1N 3BG, England
[6] Ctr Hosp Grenoble, Dept Neuroradiol, F-38043 Grenoble, France