For 5 adults maximal isometric strength at 110°, 90°, 70°, 50°, and 30° of knee flexion for the vastus medialis, rectus femoris, and vastus lateralis varied across angles but EMG responses were similar. That motor recruitment patterns were similar throughout the range of joint motion requires replication on a larger sample.
Get full access to this article
View all access options for this article.
References
1.
MirkaG. A. (1991) The quantification of EMG normalization error. Ergonomics, 34, 343–352.
2.
NieminanH.TakalaE.Vijkari-JunturaE. (1993) Normalization of electromyogram in the neck-shoulder region. European Journal of Applied Physiology, 67, 199–207.
3.
ToussaintM.De WinterA.de HaasY.de LooseM.Van DieenJ.KingmaI. (1992) Flexion relaxation during lifting: implications for torque production by muscle activity and tissue strain at the lumbo-sacral joint. Journal of Biomechanics, 28, 199–210.
4.
QueisserF.BluthnerR.BrauerD.SeidelH. (1994) The relationship between the electromyogram-amplitude and isometric tension torques of neck muscles at different positions of the cervical spine. European Journal of Applied Physiology, 68, 92–101.
5.
YangJ. F.WinterD. A. (1983) Electromyographic amplitude normalization methods: improving their sensitivity as diagnostic tools in gait analysis. Archives of Physical Medicine and Rehabilitation, 65, 517–521.
6.
YangJ. F.WinterD. A. (1984) Electromyography reliability in maximal and submaximal isometric contractions. Archives of Physical Medicine and Rehabilitation, 64, 417–420.