Child Neuropsychology by Margaret Semrud-Clikeman & Phyllis Anne Teeter Ellison

Author:Margaret Semrud-Clikeman & Phyllis Anne Teeter Ellison
Language: eng
Format: epub
Publisher: Springer US, New York, NY

Rett’s Disorder/Childhood Disintegrative Disorder

Rett’s disorder and childhood disintegrative disorder are included under the PDD umbrella. Rett’s disorder is a neurodegenerative disorder and seems out of place in the ASD category. Some have suggested that it is grouped within ASD as a place marker (Volkmar et al., 2004). Rett’s disorder is found only in girls and is usually not identified until the child is at least five-months-old (frequently later), but generally before the age of three (Swaiman & Dyken, 1999). Initially the child appears to have difficult with hand control and becomes less interested in observing or interacting with others. Neurological examinations, with MRI confirmation, generally find that the head stops growing due to a lack of brain growth. The child appears to lose language and show significant cognitive decline (Ozonoff & Rogers, 2003). With age the child begins to wring his/her hands, and to clap or rub his/her hands together. In addition, the cognitive decline continues. It is believed that Rett’s syndrome is a mutation of the X chromosome (Kerr, 2002).

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