Section of the descending columns of the fornix produces delay- and interference-dependent working memory deficits.
Rats were allocated to one of three surgical treatment groups, and given either sham operations (SHAM), transection of the descending columns of the fornix (DCF), or transection of fibres at the base of the lateral septal nuclei (SC). They were trained on a rewarded alternation task, run as a spatial working memory task on an elevated T-maze, with a minimal intratrial interval. There were no differences between the SHAM and the SC rats. The DCF rats showed an initial impairment in acquisition...Expand abstract
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