title: Spatial Impairment and Memory in Genetic Disorders: Insights from Mouse Models.
abstract: Research across the cognitive and brain sciences has begun to elucidate some of the processes that guide navigation and spatial memory. Boundary geometry and featural landmarks are two distinct classes of environmental cues that have dissociable neural correlates in spatial representation and follow different patterns of learning. Consequently, spatial navigation depends both on the type of cue available and on the type of learning provided. We investigated this interaction between spatial representation and memory by administering two different tasks (working memory, reference memory) using two different environmental cues (rectangular geometry, striped landmark) in mouse models of human genetic disorders: Prader-Willi syndrome (PWScrm+/p-mice,n= 12) and Beta-catenin mutation (Thr653Lys-substituted mice,n= 12). This exploratory study provides suggestive evidence that these models exhibit different abilities and impairments in navigating by boundary geometry and featural landmarks, depending on the type of memory task administered. We discuss these data in light of the specific deficits in cognitive and brain function in these human syndromes and their animal model counterparts.
authors.affiliation: Center for Mind/Brain Sciences, University of Trento, Rovereto 38068, Italy. sangah.lee@unitn.it.
authors.forename: Sang Ah
authors.initials: SA
authors.lastname: Lee
authors.affiliation: Neuroscience and Brain Technologies Department, Istituto Italiano di Tecnologia, Genova 16163, Italy. valter.tucci@iit.it.
authors.forename: Valter
authors.initials: V
authors.lastname: Tucci
authors.affiliation: Center for Mind/Brain Sciences, University of Trento, Rovereto 38068, Italy. giorgio.vallortigara@unitn.it.
authors.forename: Giorgio
authors.initials: G
authors.lastname: Vallortigara
keywords: Beta-catenin gene; Prader-Willi; boundary geometry; feature; navigation; spatial memory