The Neuropsychology of Down Syndrome: Evidence for Hippocampal Dysfunction

Bruce F. Pennington, Jennifer Moon, Jamie O Edgin, Jennifer Stedron, Lynn Nadel

Research output: Contribution to journalArticle

321 Citations (Scopus)

Abstract

This study tested prefrontal and hippocampal functions in a sample of 28 school-aged (M = 14.7 years, SD = 2.7) individuals with Down syndrome (DS) compared with 28 (M = 4.9 years, SD = .75) typically developing children individually matched on mental age (MA). Both neuropsychological domains were tested with multiple behavioral measures. Benchmark measures of verbal and spatial function demonstrated that this DS sample was similar to others in the literature. The main finding was a significant Group × Domain interaction effect indicating differential hippocampal dysfunction in the group with DS. However, there was a moderate partial correlation (r = .54, controlling for chronological age) between hippocampal and prefrontal composite scores in the DS group, and both composites contributed unique variance to the prediction of MA and adaptive behavior in that group. In sum, these results indicate a particular weakness in hippocampal functions in DS in the context of overall cognitive dysfunction. It is interesting that these results are similar to what has been found in a mouse model of DS. Such a model will make it easier to understand the neurobiological mechanisms that lead to the development of hippocampal dysfunction in DS.

Original languageEnglish (US)
Pages (from-to)75-93
Number of pages19
JournalChild Development
Volume74
Issue number1
StatePublished - Jan 2003

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neuropsychology
Neuropsychology
Down Syndrome
evidence
Benchmarking
group interaction
Group
Psychological Adaptation

ASJC Scopus subject areas

  • Psychology(all)
  • Developmental and Educational Psychology

Cite this

The Neuropsychology of Down Syndrome : Evidence for Hippocampal Dysfunction. / Pennington, Bruce F.; Moon, Jennifer; Edgin, Jamie O; Stedron, Jennifer; Nadel, Lynn.

In: Child Development, Vol. 74, No. 1, 01.2003, p. 75-93.

Research output: Contribution to journalArticle

Pennington, Bruce F. ; Moon, Jennifer ; Edgin, Jamie O ; Stedron, Jennifer ; Nadel, Lynn. / The Neuropsychology of Down Syndrome : Evidence for Hippocampal Dysfunction. In: Child Development. 2003 ; Vol. 74, No. 1. pp. 75-93.
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