NEUROETHOLOGYSpatial learning deficits after the development of dorsomedial telencephalon lesions in goldfishSaito, KotaroCA; Watanabe, ShigeruAuthor Information Department of Psychology, Keio University, Mita 2-15-45, Minato-ku, Tokyo 108-8345, Japan CACorresponding Author: [email protected]# Received 24 September 2004; accepted 29 October 2004 NeuroReport: December 22nd, 2004 - Volume 15 - Issue 18 - p 2695-2699 Buy SDC Abstract The effects of lesions in the dorsal area of the caudal telencephalon (Carassius auratus) on the retention of spatial learning in goldfish were examined. The experimental paradigm was similar to the dry version of the Morris water maze for rodents. After being trained to reach a criterion, goldfish underwent surgery and were then retrained. In the retraining, dorsomedial lesions resulted in poor performance, while dorsolateral lesions did not. In a landmark task in which a small circular colored cue was set at a food location, dorsomedial lesions did not produce impairment during retraining. These results suggest that dorsomedial lesions selectively caused impairment in the retention of spatial learning. © 2004 Lippincott Williams & Wilkins, Inc.