Preserved feedforward but impaired top-down processes in the vegetative state.
Science. 2011 May 13; 332(6031):858-62
Boly M, Garrido MI, Gosseries O, Bruno MA, ..., Massimini M, Litvak V, Laureys S, Friston K. Boly M, Garrido MI, Gosseries O, Bruno MA, Boveroux P, Schnakers C, Massimini M, Litvak V, Laureys S, Friston K. Science. 2011 May 13; 332(6031):858-62
Using an electrophysiological procedure, Boly and colleagues distinguish between individuals in three states of conscious awareness; a vegetative state, a minimally conscious state and full conscious awareness. They find that in vegetative patients, who show signs of arousal but no signs of awareness, top-down sensory expectations...
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