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The Journal of Neurophysiology Vol. 87 No. 1 January 2002, pp. 631-633
Copyright ©2002 by the American Physiological Society
RAPID COMMUNICATION
1Laboratory of Neuropsychology and 2Laboratory of Systems Neuroscience, National Institute of Mental Health, Bethesda, Maryland 20892
Brasted, Peter J.,
Timothy J. Bussey,
Elisabeth A. Murray, and
Steven P. Wise.
Fornix Transection Impairs Conditional Visuomotor Learning in
Tasks Involving Nonspatially Differentiated Responses. J. Neurophysiol. 87: 631-633, 2002. Rhesus monkeys
learned a series of conditional visuomotor associations involving
two-dimensional "objects" that instructed one of three responses:
tapping a touch screen, steady contact with the screen for a brief
period, or steady contact for a longer period. Relative to controls,
fornix-transected monkeys were impaired in the acquisition of new
associations and in the retention of preoperatively learned ones. These
findings challenge the view that the hippocampal system participates in
associative learning only when spatial information is relevant to
either the stimulus or the response.
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