Acquisition of Spatial Search Strategies and Reversal Learning in the Morris Water Maze Depend on Disparate Brain Functional Connectivity in Mice. (22nd December 2018)

• Record Type: Journal Article
• Authors: Shah, Disha; Verhoye, Marleen; Van der Linden, Annemie; D'Hooge, Rudi
• Is Part Of: Cerebral cortex. Volume 29:Number 11(2019)
• Page Start: 4519
• Page End: 4529
• Publication Date: 2018-12-22
• Subjects: functional connectivity -- Morris water maze -- mouse brain -- search strategy -- spatial learning; Cerebral cortex -- Periodicals; Brain -- Periodicals; 612.825
• DOI: 10.1093/cercor/bhy329
• Languages: English
• ISSNs: 1047-3211

Abstract

Abstract: Learning has been proposed to coincide with changes in connections between brain regions. In the present study, we used resting-state fMRI (rsfMRI) to map brain-wide functional connectivity (FC) in mice that were trained in the hidden-platform version of the Morris water maze. C57BL6 mice were investigated in a small animal MRI scanner following 2, 10, or 15 days of acquisition learning, or 5 days of reversal learning. Spatial learning coincided with progressive and changing FC between telencephalic regions that have been implemented in spatial learning (such as hippocampus, cingulate, visual, and motor cortex). Search strategy assessment demonstrated that the use of cognitively advanced spatial strategies correlated positively with extensive telencephalic connectivity, whereas non-spatial strategies correlated negatively with connectivity. FC patterns were different and more extensive after reversal learning compared with after extended acquisition learning, which could explain why reversal learning has been shown to be more sensitive to subtle functional defects.