ABSTRACT
【Objective】 To analyze the sensory integration characteristics of 4- to 5-year-old preschool children while maintaining static balance, in order to provide reference for promoting the development of motor development. 【Methods】 A total of 128 preschool children were randomly selected in this study from a public kindergarten in Suzhou. Wearable sensor were worn at the center of mass(COM) position for four tests: T1 standing with eyes open, T2 standing with eyes closed, T3 standing with eyes open on a sponge pad, and T4 standing with eyes closed on a sponge pad. The angular velocity modulus(ω) of COM shaking was extracted, the Romberg quotient(RQ), vestibular Romberg quotient(VRQ), and the rate of increase in body stability when integrating different sensations were calculated. The contribution weights and sensory integration characteristics of visual, proprioceptive, and vestibular sensations to static balance were analyzed. Independent sample t-test was used to analyze the differences between different gender and age groups. 【Results】 The RQ was 1.20, and the VRQ was 1.58. The contribution rates of visual, proprioceptive, and vestibular senses to body balance were approximately 9.28%, 28.19% and 62.53%, respectively. The difference in the rate of increase in body stability between integrated vision and integrated proprioception with normal vestibular perception was statistically significant(P0.05) and the difference in half year old age was not statistically significant(P>0.05). 【Conclusions】 When preschool children aged 4 - 5 maintain static balance, the contribution of vestibular integration proprioception to body stability is greater than that of vestibular integrate vision. The contribution of vestibular and visual integrate proprioception to body stability is greater than that of vestibular and proprioception integrate vision. The sensory integration characteristics between boys and girls, as well as half year old children, are basically the same.
ABSTRACT
ObjectiveTo explore the impact of different types of virtual reality environments balance exercise on human balance and posture control. MethodsFrom March to April, 2022, 30 male students from Dalian University of Technology were recruited to accept VR balance training of dynamic background (dynamic VR training) and static background (static VR training), respectively, with an interval of one week. They were measured the average moving speed of the center of pressure of human body under eight conditions before and after training, namely open-eye floor standing, close-eye floor standing, static VR background floor standing, dynamic VR background floor standing, open-eye sponge pad standing, close-eye sponge pad standing, static VR background sponge pad standing, and dynamic VR background sponge pad standing. Meanwhile, the weight of human body sensation was calculated. ResultsBefore training, the average movement speed of center of pressure was higher under the static VR than under open-eye (|t| > 2.811, P < 0.01), and lower than under close-eye (t > 3.279, P < 0.01) on both planes; while it was higher under dynamic VR than under close-eye (|t| > 4.830, P < 0.001). After dynamic VR training, the average movement speed of center of pressure increased under open-eye stable floor standing (t = 2.305, P < 0.05), decreased under close-eye on both planes (t > 3.405, P < 0.01), and decreased under static and dynamic VR on both planes (|t| > 3.285, P < 0.01). After static VR training, the average movement speed of center of pressure increased under open-eye floor standing (t = 2.224, P < 0.05), decreased under close-eye sponge pad standing (t = 2.223, P < 0.05), and decreased under dynamic VR on both planes (|t| > 2.380, P < 0.05). The weight of vision decreased after training (t > 4.132, P < 0.001), and the visual weight under normal proprioception was less after dynamic VR training than after static VR training (t = 3.611, P < 0.01). ConclusionUnder static VR background, the balance stability is poorer than under open-eye, but stronger than under close-eye. Under dynamic VR background, the balance stability is poorer under close-eye. VR balance training may decrease the stability without interference, but improve the stability under interference, which may result from reducing the dependence on visual sensation and strengthening the use of vestibular sensation, especially after VR training with dynamic background.