Department of Neurology and Neuroscience Graduate Program, The University of Iowa, 200 Hawkins Drive, Iowa City, Iowa 52242, USA. radolphs@hss.caltech.edu
Stimuli can be discriminated without being consciously perceived and can be preferred without being remembered. Here we report a subject with a previously unknown dissociation of abilities: a strong behavioral preference for the taste of sugar over saline, despite a complete failure of recognition. The pattern of brain damage responsible for the dissociation suggests that reliable behavioral choice among tastes can occur in the absence of the gustatory cortex necessary for taste recognition.