AIM We aimed to establish objective and quantitative data on fine motor development in typically developing children using magnetic sensors. METHODS The study included 110 Japanese elementary school children volunteers (57 boys, 53 girls). The participants were instructed to tap their thumbs and index fingers together repetitively for 10 s. After attaching coils to the participants' right and left thumbs and index fingers, participants executed "in-phase" and "anti-phase" tapping. We used two-way analysis of variance to analyze the influences of age and sex on fine motor development. RESULTS The "number of taps" significantly increased with age, while the "standard deviation (SD) of tapping interval" significantly decreased. More than half of the "acceleration" parameters significantly increased with age. Boys performed significantly faster than girls in some parameters of "velocity" and "acceleration," while girls had significantly lower "SD of local maximum velocity in opening motion" and "SD of local minimum velocity in closing motion." DISCUSSION We established both objective and quantitative reference data on fine motor development in typically developing Japanese children aged between 7 and 12 years using magnetic sensors. We revealed that this system can monitor real-time details of the parameters involved in the finger-tapping movement in children without complications. This device could be useful for obtaining objective and quantitative data on fine motor skills in the clinical assessment of developmental coordination disorder, assessments of educational intervention, or rehabilitation and discovery of new therapeutic agents.

中文翻译：

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使用磁传感器定量评估儿童精细运动技能

目的我们旨在使用磁传感器建立关于典型发育儿童精细运动发育的客观和定量数据。方法 该研究包括 110 名日本小学生志愿者（57 名男孩，53 名女孩）。要求参与者用拇指和食指重复敲击 10 秒。将线圈连接到参与者的左右拇指和食指后，参与者执行“同相”和“反相”敲击。我们使用方差的双向分析来分析年龄和性别对精细运动发育的影响。结果“敲击次数”随年龄增长显着增加，而“敲击间隔标准差（SD）”显着降低。过半“加速” 参数随着年龄的增长而显着增加。男孩在某些“速度”和“加速度”参数上的表现明显快于女孩，而女孩的“打开运动局部最大速度SD”和“闭合运动局部最小速度SD”明显较低。讨论 我们使用磁传感器建立了日本 7 至 12 岁儿童典型发育精细运动发育的客观和定量参考数据。我们透露，该系统可以实时监控儿童手指敲击运动所涉及参数的详细信息，而不会出现并发症。该设备可用于在发育性协调障碍的临床评估中获得关于精细运动技能的客观和定量数据，