[1] Univ Turin, Dept Psychol, Turin, Italy
[2] Univ Minnesota, Dept Neurosci, Brain Sci Ctr, Minneapolis, MN USA
[3] Univ Montreal, Dept Psychiat, Montreal, PQ H3C 3J7, Canada
[4] Inst Univ Geriatrie Montreal, Ctr Rech, Montreal, PQ, Canada
[5] Ist Italiano Tecnol, Dept Robot Brain & Cognit Sci, I-16163 Genoa, Italy
[6] Univ Minnesota, Dept Econ, Minneapolis, MN 55455 USA
[7] Ist Italiano Tecnol, Ctr Translat Neurophysiol, Ferrara, Italy
[8] Univ Ferrara, Sect Human Physiol, I-44100 Ferrara, Italy