AUTHOR=Li Chengxiang , Chen Xiang , Zhang Xu , Wu De 

TITLE=Research on the electromyography-based pattern recognition for inter-limb coordination in human crawling motion

JOURNAL=Frontiers in Neuroscience

VOLUME=Volume 18 - 2024

YEAR=2024

URL=https://www.frontiersin.org/journals/neuroscience/articles/10.3389/fnins.2024.1349347

DOI=10.3389/fnins.2024.1349347

ISSN=1662-453X

ABSTRACT=Aiming to provide a feasible crawling motion analysis method for clinical application, this paper introduced the electromyography (EMG) based motion intention recognition technology into the pattern recognition of inter-limb coordination in during human crawling for the first time. Eight interlimb coordination modes (ILCMs) were defined. Ten adult participants were recruited and each participant performed hands-knees crawling at low, medium and fast speeds in self-selected ILCM and the eight predefined ILCMs respectively. EMG signals for pattern recognition were collected from 30 limbs and trunk muscles, and pressure signal for crawling cycle segmentation was collected from left palm. The pattern recognition experiments were conducted in participant-specific, multiparticipant, and participant-independent ways, respectively, adopting three different classifiers including bidirectional long short-term memory (BiLSTM) network, support vector machine (SVM) and k-nearest neighbor (KNN). The experimental results show that EMG-based pattern recognition schemes could classify the eight ILCMs with high recognition rates, thereby confirm the feasibility of providing an EMG-based crawling motion analysis method for clinical doctors. Further, based on the classification results of self-selected ILCM at different speeds and the statistical results of stance duration, swing duration, and the duty factors of stance phase, the possible reasons why humans chose various ILCMs at different crawling speeds were discussed. The research results have potential application value for evaluating crawling function, understanding abnormal crawling control mechanism, and designing rehabilitation robot.