Developmental Coordination Disorder (DCD), which is characterized by awkwardness of movement, has been shown to impair activities of daily living that require coordinated grip control, such as writing and ball-based sports. ..Grip control is based on sensory-motor integration (integration of sensory feedback information and motor commands) in the internal model, and DCD impairs this internal model, resulting in large fluctuations in grip force during object grip. It is said that it will end up.On the other hand, the effect of DCD on spatial stability, which is one of the important components of grip control, was not clear.

　In this study, children aged 6 to 12 years were divided into dexterous and clumsy groups by M-ABC2 examination, and they were asked to perform the task of "lifting and holding an object", and each grip control and spatial. The stability was investigated.As a result, it was found that in children with clumsy hands, in addition to the variability of the gripping force, the spatial stability such as the deviation of the gripping position, the inclination of the object, and the slipping / rolling of the fingers was reduced.It was also shown that clumsy children flexibly adjust their gripping force depending on the weight of the object, but their spatial stability cannot be adapted.

　Children with clumsy hands have a reduced ability to effectively use tactile information for exercise due to impaired sensory-motor integration in the internal model.This can lead to a decrease in spatial stability, he said.Therefore, in the future, he plans to conduct research on the evaluation of interventions that improve sensory-motor integration by improving tactile sensitivity.

Paper information:[Brain Sciences] Spatial Instability during Precision Grip–Lift in Children with Poor Manual Dexterity