Abstract

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Title:: Comparison of inter-joint synergies during human crawling and walking based on acceleration signals

Author(s):: XIONG Qiliang; CHEN Ying; MO Jieyi; WAN Jinliang; School of Testing and Opto-electronic Engineering, Nanchang Hangkong University, Nanchang 330063, China

Keywords:: Keywords: crawling walking; acceleration signal inter-joint synergy

Abstract:: Abstract: Based on the coordinated control theory of human motion, a hypothesis that the similarity between the inter-joint synergies during crawling and walking is an important physiological basis for the promotion of walking rehabilitation by crawling is given and proved. The acceleration signals of 8 joints, including bilateral elbow, wrist, knee and ankle joints, in 5 subjects during crawling and walking are collected using MPU9250 accelerometer. After signals preprocessing, period segmentation and vectorization, the non-negative matrix factorization algorithm is used to extract the inter-joint synergies of the limbs during crawling and walking, and the correlation coefficients between the inter-joint synergies during crawling and walking are calculated. The results show that two inter-joint synergy patterns can be extracted from 5 subjects during crawling and walking, and that the corresponding correlation coefficients are 0.76 and 0.72, which indicates that the inter-joint synergies during crawling and walking are similar. The study provides some reference for the application of crawling in childrens walking rehabilitation.