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- Title
Longitudinal Observation of the Acquisition Process for Rolling-Over Movement in Infancy.
- Authors
Yamamoto, Naoki
- Abstract
Rolling-over movement in infancy has been discussed in terms of neurological factors. To redefine rolling-over movement in relation to perception and individual kinematic properties, this study used longitudinal observations to investigate two infants' acquisition of rolling-over movement. One infant frequently kicked the supporting surface at an early stage, and this kicking movement became accompanied by an extension of the neck, with growth. The other infant frequently twisted his upper body at an early stage, and this twist movement came to involve the entire body, with growth. Thus, the developmental process varied by each infants' characteristic movements. But at the stage when they acquired rolling-over movements, both infants could turn widely from a supine position along a visual line. In addition, each infant performed rolling-over movements by using movement patterns observed during a later stage. These results suggest that the processes of acquiring rolling-over movements are dynamic, as infants explore the relationship between one's orientation to the environment and physical movements.
- Subjects
INFANT physiology; INFANT growth; BODY movement; SUPINE position; KINEMATICS
- Publication
Japanese Journal of Developmental Psychology / Hattatsu Shinrigaku Kenkyū, 2011, Vol 22, Issue 3, p261
- ISSN
0915-9029
- Publication type
Article