Figure 3. EMG instantaneous signals for aged people (60 years); (a) vastus lateralis signals of left leg, (b) gastrocnemius signals of left leg

From

EMG Signals for Co-Activations of Major Lower Limb Muscles in Knee Joint Dynamics

Md. T. I. Khan, T. Kurita

Biomedical Science and Engineering. 2015, 3(1), 9-14 doi:10.12691/bse-3-1-3