Low-Resolution Place and Response Learning Capacities in Down Syndrome.
Details
Serval ID
serval:BIB_09FDE13284C7
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
Low-Resolution Place and Response Learning Capacities in Down Syndrome.
Journal
Frontiers in psychology
ISSN
1664-1078 (Print)
ISSN-L
1664-1078
Publication state
Published
Issued date
2018
Peer-reviewed
Oui
Volume
9
Pages
2049
Language
english
Notes
Publication types: Journal Article
Publication Status: epublish
Publication Status: epublish
Abstract
Down syndrome (DS), the most common genetic cause of intellectual disability, results from the partial or complete triplication of chromosome 21. Individuals with DS are impaired at using a high-resolution, allocentric spatial representation to learn and remember discrete locations in a controlled environment. Here, we assessed the capacity of individuals with DS to perform low-resolution spatial learning, depending on two competing memory systems: (1) the place learning system, which depends on the hippocampus and creates flexible relational representations of the environment; and (2) the response learning system, which depends on the striatum and creates fixed stimulus-response representations of behavioral actions. Individuals with DS exhibited a preservation of the low-resolution spatial learning capacities subserved by these two systems. In place learning, although the average performance of individuals with DS was lower than that of typically developing (TD) mental age (MA)-matched children and TD young adults, the number of individuals with DS performing above chance level did not differ from TD children. In response learning, the average performance of individuals with DS was lower than that of TD adults, but it did not differ from that of TD children. Moreover, the number of individuals with DS performing above chance level did not differ from TD adults, and was higher than that of TD children. In sum, whereas low-resolution place learning appears relatively preserved in individuals with DS, response learning appears facilitated. Our findings are consistent with the hypothesis that the neural pathways supporting low-resolution place learning and response learning are relatively preserved in DS.
Keywords
Down syndrome, allocentric, dissociation, egocentric, multiple memory systems, spatial memory
Pubmed
Web of science
Open Access
Yes
Create date
20/11/2018 9:56
Last modification date
20/08/2019 13:32