サイトウ　ヒロキ   Saito Hiroki   斎藤　寛樹    所属   医療保健学部 リハビリテーション学科　理学療法学専攻    職種   助教
言語種別	英語
発行・発表の年月	2023/01
形態種別	学術論文
査読	査読あり
標題	Variability of trunk muscle synergies underlying the multidirectional movements and stability trunk motor tasks in healthy individuals
執筆形態	共著
掲載誌名	Scientific Reports
掲載区分	国外
出版社・発行元	Nature
巻・号・頁	13,pp.1193
著者・共著者	Hiroki Saito, Hikaru Yokoyama, Atsushi Sasaki, Kazuya Matsushita, Kimitaka Nakazawa
概要	Muscle synergy analysis is useful for investigating trunk coordination patterns based on the assumption that the central nervous system reduces the dimensionality of muscle activation to simplify movement. This study aimed to quantify the variability in trunk muscle synergy during various trunk motor tasks in healthy participants to provide reference data for evaluating trunk control strategies in patients and athletes. Sixteen healthy individuals performed 11 trunk movement and stability tasks with electromyography (EMG) recording of their spinal and abdominal muscles (6 bilaterally). Non-negative matrix factorization applied to the concatenated EMG of all tasks identified the five trunk muscle synergies (W) with their corresponding temporal patterns (C). The medians of within-cluster similarity defined by scalar products in W and rmax coefficient using the cross-correlation function in C were 0.73–0.86 and 0.64–0.75, respectively, while the inter-session similarities were 0.81–0.96 and 0.74–0.84, respectively. However, the lowest and highest values of both similarity indices were broad, reflecting the musculoskeletal system’s redundancy within and between participants. Furthermore, the significant differences in the degree of variability between the trunk synergies may represent the different neural features of synergy organization and strategies to overcome the various mechanical demands of a motor task.
外部リンクURL	https://www.nature.com/articles/s41598-023-28467-6