Abstract:
BACKGROUND:Infants aged 2 to 5 months show spontaneous general movements (GMs) of the whole body, which are referred to as fidgety movements (FMs). Although previous studies have shown that evaluation of GMs by the General Movement Assessment (GMA) has predictive value about later neurological impairments, it remains unknown whether raters consistently perceive and rate such complex kinematic information. OBJECTIVE:The purpose of this study was to construct a method to reveal which movement features are associated with each rater's evaluation of FMs based on the GMA. DESIGN:GMA scores of 163 healthy infants aged 11 to 16 weeks postterm were matched with data obtained from a 3-dimensional motion analysis system. METHODS:Three physical therapists performed the GMA and classified GMs into 9 types, from which we focused on 3 subtypes differing in the temporal organization of FMs (continual, intermittent, and sporadic FMs). We also calculated 6 movement indices (average velocity of limb movements, number of movement units, kurtosis of acceleration, jerk index, average curvature, and correlation between limb velocities) for arms and legs for each infant and analyzed which movement indices were associated with the ratings of the 3 FM subtypes by each rater. RESULTS:Only the average curvature differed significantly among the ratings of the 3 FM subtypes for all 3 raters. Each rater showed significant differences in the average curvature in either arms or legs. LIMITATIONS:It is difficult to generalize the present results to raters with various levels of expertise and experience in using the GMA. This issue calls for further research. CONCLUSIONS:The method used revealed commonality and individuality about the perceived movement features that can be associated with the rating of FMs.
journal_name
Phys Therjournal_title
Physical therapyauthors
Gima H,Shimatani K,Nakano H,Watanabe H,Taga Gdoi
10.1093/ptj/pzz034subject
Has Abstractpub_date
2019-06-01 00:00:00pages
701-710issue
6eissn
0031-9023issn
1538-6724pii
5505341journal_volume
99pub_type
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