Document Detail


Effect of weight load added to wrists on manual non-exploratory and exploratory behaviors in infants.
MedLine Citation:
PMID:  24611265     Owner:  NLM     Status:  In-Process    
Abstract/OtherAbstract:
Investigating manual actions when infants' upper limbs are heavier can provide information on whether mechanical forces can influence the early ability of exploring grasped objects. This study assessed whether additional weight load affected typical infants' manual non-exploratory and exploratory behaviors. Ten healthy full-term infants were evaluated longitudinally at 5, 6, and 7 months of age. They were tested consecutively without weight and with a weight of 20% of the total upper limb mass (M = 74.7-85.3 g) attached to their wrists while seated in a baby chair. During each condition, a malleable rubber object was presented atinfant's midline to elicit reaching, grasping, and object exploration for 2 min. Reactions were recorded using three digital cameras. Behaviors were coded as non-exploratory (dropping) and manual exploratory behaviors (waving, banging, rotating, alternating and mouthing) and were computed by frequencies of their occurrence. The analyses indicated that the frequency of dropping increased in the weight condition independent of age. This indicates that the non-exploratory behavior was affected by the load disturbance imposed by the additional weight.
Authors:
Daniele de Almeida Soares; Aline de Martins Toledo; Raquel de Paula Carvalho; Eloisa Tudella
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Perceptual and motor skills     Volume:  117     ISSN:  0031-5125     ISO Abbreviation:  Percept Mot Skills     Publication Date:  2013 Oct 
Date Detail:
Created Date:  2014-03-11     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0401131     Medline TA:  Percept Mot Skills     Country:  United States    
Other Details:
Languages:  eng     Pagination:  651-63     Citation Subset:  IM    
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