[1] McGill Univ, Dept Neurol & Neurosurg, Montreal, PQ H3T 1E2, Canada
[2] McGill Univ, Dept Psychol, Montreal, PQ H3T 1E2, Canada
[3] McGill Univ, Jewish Gen Hosp, Lady Davis Inst Med Res, Dept Neurosci, Montreal, PQ H3T 1E2, Canada
[4] Univ Montreal, Dept Neurosci, Funct Neuroimaging Unit, Montreal, PQ, Canada