Effects of short-lasting inactivations of the ventral hippocampus and medial septum on long-term and short-term acquisition of spatial information in rats
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Roles of the ventral hippocampus and medial prefrontal cortex in spatial reversal learning and attentional set-shifting
2021, Neurobiology of Learning and MemoryCitation Excerpt :In spite of no apparent avoidance in the two inactivation sessions, the muscimol group drew level with the saline group on the subsequent session when no treatment was administered, suggesting some form of latent learning might take place (Fig. 4b). This phenomenon had already been observed by Poucet, Herrmann, and Buhot (1991), who pointed out that if the vHPC is temporarily inactivated, spatial information can still be acquired but not expressed. The hippocampus is generally not a brain structure that is associated with reversal learning.
The effects of apparatus design and test procedure on learning and memory performance of C57BL/6J mice on the Barnes maze
2012, Journal of Neuroscience MethodsCitation Excerpt :A black metal ramp covered with 1.4 cm wire mesh allowed the mice to crawl into the escape box. A black cloth curtain covered the area below the maze to reduce shadows beneath the maze (see Poucet et al., 1991). The SBM was located in a 2.6 m × 5.1 m room and the extra-maze visual cues consisted of objects within the room (desk, computer, television, sink, door), the experimenter, shapes (triangle, circle, rectangle) made of Bristol board adhered to the room's walls, and the geometric layout of the testing room (supplementary Fig. 1D and E).
Stress impairs spatial but not early stimulus-response learning
2010, Behavioural Brain ResearchA novel version of the 8-arm radial maze: Effects of cerebral ischemia on learning and memory
2004, Journal of Neuroscience MethodsCitation Excerpt :Differently from the conventional radial maze in which the pattern of rewarded (baited) arms can take on different combinations, the model described here uses a single reward pattern, i.e. only one arm contained the true goal box, thus constituting a simple place task that should allow the use of both guidance and place strategies. Under these conditions, the present data agree with those acquired in the circular platform task, examining the effects of age (Barnes, 1979, 1988), pharmacological inactivation of the hippocampus (Poucet et al., 1991) and cerebral ischemia (Milani et al., 1998). In the present study, the aversive, 8-arm radial maze distinguished ischemic from control rats mainly by working memory performance.