Qiu Dan, Fischer Heidi C, Kamper Derek G
Illinois Institute of Technology, Chicago, 60616, USA.
Annu Int Conf IEEE Eng Med Biol Soc. 2009;2009:3987-90. doi: 10.1109/IEMBS.2009.5333525.
The article investigated whether joint postures affect index finger muscle activation patterns. Ten subjects attempted to produce submaximal isometric forces in six orthogonal directions (palmar, dorsal, abduction, adduction, distal and proximal) at each of 9 different joint postures. Activation patterns were recorded from intramuscular electrodes inserted into 6 of the index finger muscles. Post hoc statistical analysis revealed that joint angles significantly affected muscle activation levels for each of the force directions. Activation was especially sensitive to interphalangeal joint angles; changes in these angles led to not only changes in the magnitude of activation but to changes in patterns as well.
该文章研究了关节姿势是否会影响食指肌肉的激活模式。十名受试者试图在9种不同的关节姿势下，于六个正交方向（掌侧、背侧、外展、内收、远侧和近侧）产生次最大等长力。通过插入食指6块肌肉中的肌内电极记录激活模式。事后统计分析表明，关节角度对每个力方向的肌肉激活水平均有显著影响。激活对指间关节角度尤为敏感；这些角度的变化不仅导致激活幅度的变化，还导致模式的改变。
