Developmental Changes in the Collis Horizontal Reaction Analyzed Using a Three-Dimensional Video Motion Analysis System II. Examination of Upper-Limb Movement during the Collis Horizontal Reaction

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Other Title
  • ビデオ式3次元動作解析システムを用いてのCollis水平反応の発達変化  第2報  Collis水平反応の上肢運動の検討
  • II. Examination of Upper-Limb Movement during the Collis Horizontal Reaction
  • 第2報Collis水平反応の上肢運動の検討

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Abstract

At four months old, infants of 72% challenged with the Collis horizontal reaction touch the floor with the back of their free hand. As the infants grow older, the ratio of infants that open their free hand and perform a support reaction increases from 0% to 100%. At nine months old, all infants perform this support reaction with their free hand palm-side down.<BR>To assess infant development more accurately, we used a three-dimensional video motion analysis system to evaluate upper limb movement in 38 infants (total 151times) from 4-9 months old during the second and third phases determined by the Collis horizontal reaction. By analyzing the constituent components of upper limb movement during the Collis horizontal reaction, we assessed the usefulness of the reactions as an objective tool to measure developmental changes in infants.<BR>During the analysis, we thought to assess the speed of the upper limb reaction was respect to pronating the forearm, supporting the body with the palm down, and location of their free hand. The analysis shows that if development progresses normally and infants pronate the forearm to support the body with the palm down, the central value at which their free hand is located moves to a point under the shoulder.<BR>The results suggest that in infants four to nine months old, the Collis horizontal reaction is an excellent method to assess not only the present physical development level, but also future physical development attainment by only evaluating developmental changes of upper limb movement only.

Journal

  • NO TO HATATSU

    NO TO HATATSU 37 (6), 487-492, 2005

    THE JAPANESE SOCIETY OF CHILD NEUROLOGY

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