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Brashear, Allison; Mink, Jonathan W.; Hill, Deborah F.; Boggs, Niki; McCall, W. Vaughn; Stacy, Mark A.; Snively, Beverly; Light, Laney S.; Sweadner, Kathleen J.; Ozelius, Laurie J.; Morrison, Leslie – Developmental Medicine & Child Neurology, 2012
We report new clinical features of delayed motor development, hypotonia, and ataxia in two young children with mutations (R756H and D923N) in the "ATP1A3" gene. In adults, mutations in "ATP1A3" cause rapid-onset dystonia-Parkinsonism (RDP, DYT12) with abrupt onset of fixed dystonia. The parents and children were examined and videotaped, and…
Descriptors: Athletes, Sports Medicine, Motor Development, Seizures

Silverstein, A. B.; And Others – American Journal of Mental Retardation, 1988
Evidence of an association between Alzheimer disease and Down syndrome led to three studies on the effects of age on the adaptive behavior of over 400 Down syndrome individuals. One study found a decline in motor development competence among older (over 60 years) Down syndrome individuals when compared with other mentally retarded persons.…
Descriptors: Adaptive Behavior (of Disabled), Age Differences, Competence, Downs Syndrome
Joh, Amy, S.; Adolph, Karen, E. – Child Development, 2006
Walkers fall frequently, especially during infancy. Children (15, 21, 27, 33, and 39 month-olds) and adults were tested in a novel foam pit paradigm to examine age-related changes in the relationship between falling and prospective control of locomotion. In trial 1, participants walked and fell into a deformable foam pit marked with distinct…
Descriptors: Toddlers, Experiential Learning, Accident Prevention, Motor Development