Figure 3.

Spatial memory task. Postoperative acquisition of an all-arms baited version of an 8-arm radial maze task. (A) Mean (±SEM) number of revisit errors to the eight baited arms. The group with lesions to the anterior thalamic aggregate (AT), comprising the anterodorsal, anteromedial, and anteroventral thalamic nuclei, was different from both the controls and the group with lesions to the lateral thalamic aggregate (LT), comprising the intralaminar nuclei (centrolateral, paracentral, and rostral central medial nuclei) and the lateral mediodorsal thalamic nuclei (lateral and paralamellar nuclei), P < 0.0001. (B) Mean (±SEM) number of correct arm visits made before a revisit error. The AT group was different to both the controls and the LT group, P < 0.0001. (C) Scattergram of mean percent damage for all rats with lesions intended for the anterior thalamic aggregate (AT; n = 8) and the mean number of revisit errors for the last three blocks of postoperative training trials. Solid circles, AT inclusions (n = 6); open circles, AT exclusions (n = 2). (D) Scattergram of mean percent damage for all rats with lesions intended for the lateral thalamic aggregate (LT; n = 9) and the mean number of revisit errors for the last three blocks of post-operative training trials. Solid triangles, LT inclusions (n = 6); open triangles, LT exclusions (n = 3). See text and Table 1 for inclusion/exclusion details.