The Human Striatum is Necessary for Responding to Changes in Stimulus Relevance

@article{citeulike:1300576, abstract = {Various lines of evidence suggest that the striatum is implicated in cognitive flexibility. The neuropsychological evidence has, for the most part, been based on research with patients with Parkinson's disease, which is accompanied by chemical disruption of both the striatum and the prefrontal cortex. The present study examined this issue by testing patients with focal lesions of the striatum on a task measuring two forms of cognitive switching. Patients with striatal, but not frontal lobe lesions, were impaired in switching between concrete sensory stimuli. By contrast, both patient groups were unimpaired when switching between abstract task rules relative to baseline nonswitch trials. These results reveal a dissociation between two distinct forms of cognitive flexibility, providing converging evidence for a role of the striatum in flexible control functions associated with the selection of behaviorally relevant stimuli.}, author = {Cools, R. and Ivry, R. B. and D'Esposito, M. }, citeulike-article-id = {1300576}, journal = {J. Cogn. Neurosci.}, keywords = {fmri, learning, reward\_prediction\_error, stimulus\_relevance, striatum}, month = {December}, number = {12}, pages = {1973--1983}, posted-at = {2007-05-16 18:27:43}, priority = {2}, title = {The Human Striatum is Necessary for Responding to Changes in Stimulus Relevance}, url = {http://jocn.mitpress.org/cgi/content/abstract/18/12/1973}, volume = {18}, year = {2006} }

TY - JOUR ID - citeulike:1300576 L3 - citeulike-article-id:1300576 TI - The Human Striatum is Necessary for Responding to Changes in Stimulus Relevance JF - J. Cogn. Neurosci. VL - 18 IS - 12 SP - 1973 EP - 1983 N2 - Various lines of evidence suggest that the striatum is implicated in cognitive flexibility. The neuropsychological evidence has, for the most part, been based on research with patients with Parkinson's disease, which is accompanied by chemical disruption of both the striatum and the prefrontal cortex. The present study examined this issue by testing patients with focal lesions of the striatum on a task measuring two forms of cognitive switching. Patients with striatal, but not frontal lobe lesions, were impaired in switching between concrete sensory stimuli. By contrast, both patient groups were unimpaired when switching between abstract task rules relative to baseline nonswitch trials. These results reveal a dissociation between two distinct forms of cognitive flexibility, providing converging evidence for a role of the striatum in flexible control functions associated with the selection of behaviorally relevant stimuli. KW - fmri KW - learning KW - reward_prediction_error KW - stimulus_relevance KW - striatum AU - Cools, R AU - Ivry, RB AU - D'Esposito, M PY - 2006/12/01/ UR - http://jocn.mitpress.org/cgi/content/abstract/18/12/1973 ER -