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Early manifestations of manual specialisation in infants A longitudinal study from 2 to 3 weeks

, : Early manifestations of manual specialisation in infants A longitudinal study from 2 to 3 weeks.

This longitudinal study examined lateral differences between latency time of the two hands during the development of prehension in 12 infants from 2 to 3 weeks. Latency time (LT) is defined as the delay between the visual localisation of a reachable target and the beginning of the movement and could be considered as a phase in the preparation of action. If LT varies with the hand used and the type of movement, this would suggest differences in information processing (nature and/or quantity). show that the latency time is shorter for the left hand approach movements and shorter for the right hand grasping movements. These findings are in favour of a manual specialisation clearly present from 2 weeks and are discussed in a possible hemispheric specialisation perspective.


DOI: 10.1080/1357650X.2012.660163

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