Xiong Qi L, Wu Xiao Y, Xiao Nong, Zeng Si Y, Wan Xiao P, Zheng Xiao L, Hou Wen S
Annu Int Conf IEEE Eng Med Biol Soc. 2015;2015:2115-8. doi: 10.1109/EMBC.2015.7318806.
Muscle Co-activation (MCo) is the simultaneous muscular activation of agonist and antagonist muscle groups, which provides adequate joint stability, movement accuracy during movement. Infant crawling is an important stage of motor function development that manifests non-synchronization growth and development of upper and lower limbs due to the well-known gross motor development principle of head to toe. However, the effect of MCo level for agonist and antagonist muscle groups on motor function development of limbs has not been previously reported. In this paper, sEMG signals were collected from triceps brachii (TB) and biceps brachii (BB), quadriceps femoris (QF) and hamstrings (HS) of limbs when fourteen infants were crawling at their self-selected speed. Antagonist muscle co-activation was evaluated by measuring two common indexes (co-activation index and Pearson's correlation coefficient).A significant difference was observed between upper limbs and lower limbs, but the relationship between MCo and speed of crawling was poor. This study is an opening for further investigation including a longitudinal study and compare against infant with CNS disorders.
肌肉协同激活（MCo）是指同时激活原动肌和拮抗肌群，这在运动过程中能提供足够的关节稳定性和运动准确性。婴儿爬行是运动功能发育的一个重要阶段，由于众所周知的从头到脚的大运动发育原则，婴儿上下肢的生长发育不同步。然而，原动肌和拮抗肌群的MCo水平对肢体运动功能发育的影响此前尚未见报道。本文在14名婴儿以自选速度爬行时，采集了其四肢肱三头肌（TB）和肱二头肌（BB）、股四头肌（QF）和腘绳肌（HS）的表面肌电信号。通过测量两个常用指标（协同激活指数和皮尔逊相关系数）来评估拮抗肌协同激活情况。研究发现上肢和下肢之间存在显著差异，但MCo与爬行速度之间的关系较弱。本研究为进一步开展包括纵向研究以及与中枢神经系统疾病婴儿进行对比的研究打开了大门。
