“…Following anoxia consequent to stroke and other causes such as cardiac failure, drowning, carbon monoxide exposure and various accidents, there is a complex cascade of events in neurons causing cell death and functional neurological damage (Neubauer and Sunderram, 2004;Clarkson et al, 2005;Lo et al, 2005;Rashidian et al, 2005). Altered functional states include arousal, attention, intention, memory and awareness, all observed during global disorders of consciousness (Vexler et al, 1994;Schiff and NY, 10021, Telephone: 212-327-8668, Fax: 212-327-8664, E-mail: iarrieta@mail.rockefeller.edu.2000; Glenn et al, 2003;Dunham et al, 2004;Laureys et al, 2004;Young et al, 2004;Caputa et al, 2005).…”