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    Spatial memory abilities and abnormal development of the hippocampal formation in Down syndrome.

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    Author
    Mangan, Peter Anthony
    Issue Date
    1992
    Keywords
    Dissertations, Academic.
    Neurosciences.
    Developmental psychology.
    Down syndrome.
    Advisor
    Rosser, Rosemary
    
    Metadata
    Show full item record
    Publisher
    The University of Arizona.
    Rights
    Copyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.
    Abstract
    The recent evidence concerning the nature of cognitive development in Down Syndrome (DS) suggests that it is different than normal development. The neuropathology seen in DS implicates a prenatal interruption of normal neural development as a possible basis for these differences. Since the hippocampal formation (HF) undergoes extensive postnatal maturation and is found to be abnormal in DS, it is proposed that cognitive deficits associated with DS would be most evident in tasks requiring hippocampal function. The performance of DS children at 16-18 months and 28-30 months of age was compared to that of age-matched control groups of normal children on two cognitive tasks requiring abilities that develop during the first postnatal year shown not to involve hippocampal function, and a task requiring abilities that develop during the second postnatal year shown to require hippocampal functioning. The results show that the DS performed comparably on the nonhippocampal tasks but differently on the hippocampal task. The normal children's performance supports the position that the ability to perform HF tasks develops during the second postnatal year while the performance of the older DS children suggested that this development does not occur in DS. The specificity of the deficits to the hippocampal task was interpreted as indicative of a lack of HF development in DS.
    Type
    text
    Dissertation-Reproduction (electronic)
    Degree Name
    Ph.D.
    Degree Level
    doctoral
    Degree Program
    Social and Behavioral Sciences
    Graduate College
    Degree Grantor
    University of Arizona
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    Dissertations

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