van Beek Nathalie, Stegeman Dick F, van den Noort Josien C, H E J Veeger DirkJan, Maas Huub
Department of Human Movement Sciences, Faculty of Behavioural and Movement Sciences, Vrije Universiteit Amsterdam, Amsterdam Movement Sciences, The Netherlands.
Department of Human Movement Sciences, Faculty of Behavioural and Movement Sciences, Vrije Universiteit Amsterdam, Amsterdam Movement Sciences, The Netherlands; Donders Institute, Department of Neurology and Clinical Neurophysiology, Radboud University Medical Centre, Nijmegen, The Netherlands.
J Electromyogr Kinesiol. 2018 Feb;38:187-196. doi: 10.1016/j.jelekin.2017.02.006. Epub 2017 Feb 21.
The fingers of the human hand cannot be controlled fully independently. This phenomenon may have a neurological as well as a mechanical basis. Despite previous studies, the neuromechanics of finger movements are not fully understood. The aims of this study were (1) to assess the activation and coactivation patterns of finger specific flexor and extensor muscle regions during instructed single finger flexion and (2) to determine the relationship between enslaved finger movements and respective finger muscle activation. In 9 healthy subjects (age 22-29), muscle activation was assessed during single finger flexion using a 90 surface electromyography electrode grid placed over the flexor digitorum superficialis (FDS) and the extensor digitorum (ED). We found (1) no significant differences in muscle activation timing between fingers, (2) considerable muscle activity in flexor and extensor regions associated with the non-instructed fingers and (3) no correlation between the muscle activations and corresponding movement of non-instructed fingers. A clear disparity was found between the movement pattern of the non-instructed fingers and the activity pattern of the corresponding muscle regions. This suggests that mechanical factors, such as intertendinous and myofascial connections, may also affect finger movement independency and need to be taken into consideration when studying finger movement.
人类手部的手指无法完全独立控制。这种现象可能有神经学和机械学两方面的基础。尽管之前有过相关研究，但手指运动的神经力学尚未被完全理解。本研究的目的是：（1）评估在指令性单指屈曲过程中，手指特定屈肌和伸肌区域的激活及共同激活模式；（2）确定被带动手指运动与相应手指肌肉激活之间的关系。在9名健康受试者（年龄22 - 29岁）中，使用放置在指浅屈肌（FDS）和指伸肌（ED）上的90个表面肌电图电极网格，在单指屈曲过程中评估肌肉激活情况。我们发现：（1）各手指之间肌肉激活时间无显著差异；（2）与未被指令的手指相关的屈肌和伸肌区域有相当程度的肌肉活动；（3）未被指令手指的肌肉激活与相应运动之间无相关性。未被指令手指的运动模式与相应肌肉区域的活动模式之间存在明显差异。这表明，诸如腱间和肌筋膜连接等机械因素，也可能影响手指运动的独立性，在研究手指运动时需要予以考虑。
