인문,사회과학편 : 양수협응 과제를 통한 발달성 협응장애 아동의 협응패턴: 운동제어의 역동성 이론을 중심으로 = Bimanual coordination dynamics in children with developmental coordination disorder: dynamical theory of motor control

다국어 초록 (Multilingual Abstract)

The study explored the intrinsic characteristics of rhythmic inter-limb coordination in children with and without Developmental Coordination Disorder(DCD). Eight children with DCD(mean age=10 yrs) and 8 matched controls were instructed to rhythmically flex and extend both forearms in the horizontal plan to a 1 Hz metronome beat in one of two coordination modes(inphase/ antiphase), and under conditions of weight loading of the limbs(300g-0g, 150g-0g, 0g-0g, 0g-150g, 0g-300g). A Particular pattern of displacement of relative phase(Φ) from perfect inphase and antiphase was observed when coordinated limbs had different preferred frequency(Δω≠0) depending in physical characteristics of the limbs. We predicted that the manipulating weights of coordinated limbs would be deferentially affected on relative phase, a measure of coordination between the limbs, in the children with DCD and typically developed children. The result showed greater Φ shift and coordination variability when Δω≠0 than when Δω=0. Also, there was greater mean Φ and SDΦ for antiphase than inphase coordination mode. These findings were increased in the children with DCD. Here we observed phase shift in direction and magnitude of Δω. However, we could not find an consistent phase shift dependent on magnitude of Δω for DCD group. This suggested that these children have a problem in organizing temporal and spatial control. Less stable coordination would be due to a deficit in parameterize the coordination dynamics.

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