Document Detail

Sensitivity of infants with and without Down syndrome to intrinsic dynamics.
MedLine Citation:
PMID:  9094759     Owner:  NLM     Status:  MEDLINE    
We examined the way in which infants with and without Down syndrome (DS) adapted their intrinsic dynamics, that is, their spontaneous leg movements, to perturbations. Weights totaling 25%, 50%, and 100% of their estimated calf mass were attached to one leg as they sat in an infant seat and moved freely. Particularly at higher weightings, infants in both groups demonstrated bilateral sensitivity and adaptability by increasing activity levels of the unweighted leg relative to the weighted leg. Individual differences in sensitivity thresholds were observed for both groups, but more infants with than without DS demonstrated minimal overt adaptation to the perturbation. We argue that the capacity to respond differentially to the dynamics of movement contexts is necessary for acquiring functional motor skills.
B D Ulrich; D A Ulrich; R Angulo-Kinzler; D D Chapman
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S.    
Journal Detail:
Title:  Research quarterly for exercise and sport     Volume:  68     ISSN:  0270-1367     ISO Abbreviation:  Res Q Exerc Sport     Publication Date:  1997 Mar 
Date Detail:
Created Date:  1997-06-04     Completed Date:  1997-06-04     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  8006373     Medline TA:  Res Q Exerc Sport     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  10-9     Citation Subset:  IM    
Department of Kinesiology, Indiana University, USA.
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MeSH Terms
Down Syndrome / physiopathology,  psychology*
Leg / physiology
Motor Activity / physiology*
Motor Skills / physiology*

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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