Fig. 2From: Changes in tibialis anterior architecture affect the amplitude of surface electromyogramsElectrically elicited responses, muscle architecture and ankle position. Raw, monopolar M waves (left column), their peak-to-peak amplitude (central column; greyscale images) and ultrasound images from TA (right column) are shown for a representative participant. Grey circles in the central column denote electrodes for which the M-waves peak-to-peak amplitude exceeded 70% of the maximal peak-to-peak amplitude obtained for each of the three ankle positions tested: dorsiflexion (top row), neutral (middle row) and plantar flexion (bottom row). Rectangles drawn in the right column schematically indicate the relative position between electrodes and TA fibres; note different rectangles are positioned over the superficial extremity of different TA fasciclesBack to article page