第十四屆 6至8個月嬰幼兒坐姿下壓力中心量測對於阿爾伯塔嬰幼兒動作評估量表與哈里斯嬰幼兒神經動作測試之相關性探討

Relationships among the Alberta Infant Motor Scale and the Harris Infant Neuromotor Test to the Center of Pressure (COP) Measure in Sitting for 6- to 8-month-old Infants: Preliminary Report

伊薇靜¹、蔡生盡²、劉文瑜^1*、鄭智修¹

Wei-Jing I¹,Sheng-Chin Tsai²,Wen-Yu Liu^1*,Chih-Hsiu Cheng¹

¹ 長庚大學醫學院物理治療學系暨復健科學研究所、²衛生福利部台北醫院復健科

¹ Department of Physical Therapy, Graduate Institute of Rehabilitation Science College of Medicine University of Chang Gung, Taoyuan, Taiwan,² Department of Physical Medicine and Rehabilitation, Taipei Hospital, Ministry of Health and Welfare, New Taipei City, Taiwan

Background and Purpose：Upright sitting is an important developmental motor milestone to infants. The center of pressure (COP) measure in sitting might reflect the postural stability and serve as a good indicator to detect atypical motor performance of the infants. The neuromotor assessments, such as the Alberta Infant Motor Scale (AIMS) and the Harris Infant Neuromotor Test (HINT), are reliable and valid for qualifying infants’ motor performance in 6- to 8-month old. The contribution of instrumented COP measure in reflection of the motor performance in infants remains unclear. The purpose of this study was to determine if the COP measure in sitting is a valid measure of motor performance in 6-8 months old infants.

Methods：Twenty-four infants participated in this study (14 boys, 10 girls, mean age: 7.0 ± 1.0 months). The inclusion criteria were: (1) infants age between 6- to 8-month-old, and (2) infants maintain a sitting position for at least 30 seconds without falling. The AIMS and the HINT were used to quantify infants’ motor performance. The COP excursions were recorded by the RS footscan® USB balance system and were analyzed off-line using the customized MatLab program. The COP parameters included the COP movement range (mm), path length (mm), and velocity (mm/s). Descriptive statistics and Spearman's rank-order correlation coefficient were used in statistical analyses.

Results：The total score of the AIMS was fairly correlated to the COP range in the anterior-posterior (A-P) (r=.282, p=.182) and the medial-lateral (M-L) direction (r=.282, p=.182) respectively. The COP range in the M-L direction showed significant fair relationship to the AIMS prone score (r=.422, p=.040). The total score of the HINT was little or no relationship with the COP measures. However, the HINT section score of the transition from supine to prone, as well as the behaviors observed throughout the testing, was fairly correlated with A-P range, M-L range, mean sway velocity, and path length of the COP measure (r=.251~r=.380).

Conclusions：Despite small sample sizes, preliminary results suggest that relationships between COP measures in sitting and motor performances for young infants were observed. Further studies that include more infants are worthwhile to clarify relationships in order to determine for the usefulness of the COP measure in sitting for young infants.

Keywords: Infant, Center of Pressure (COP), Sit, Alberta Infant Motor Scale (AIMS), Harris Infant Neuromotor Test (HINT)