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ERIC Number: EJ874808
Record Type: Journal
Publication Date: 2010-Apr
Pages: 4
Abstractor: As Provided
Reference Count: 0
ISSN: ISSN-0278-2626
Right-Left Approach and Reaching Arm Movements of 4-Month Infants in Free and Constrained Conditions
Morange-Majoux, Francoise; Dellatolas, Georges
Brain and Cognition, v72 n3 p419-422 Apr 2010
Recent theories on the evolution of language (e.g. Corballis, 2009) emphazise the interest of early manifestations of manual laterality and manual specialization in human infants. In the present study, left- and right-hand movements towards a midline object were observed in 24 infants aged 4 months in a constrained condition, in which the hands were maintained closed, and in a free condition. A left-hand dominance for approach movements without contact with the object, and a right-hand dominance for reaching movements with object contact was observed in the free condition. In the constrained condition reaching movements of the right hand decreased dramatically. These results are interpreted as strong evidence of manual specialization in 4-month olds, with approach movements having a localization role and reaching movements announcing future right-hand dominance for prehension and object manipulation. (Contains 2 figures.)
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Publication Type: Journal Articles; Reports - Research
Education Level: N/A
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A