A Mechanical Sensor Designed for Dynamic Joint Angle Measurement

Figure 6

Data collection from the measurement card of MGR for dynamic assessment of lower limb joint angles: (a) right hip, (b) right knee, and (c) right ankle. The subject was asked to stand naturally and stationary after walking. Then the measurement card was removed from the cardholder and this removing process marked a sign onto the measurement card to indicate the location of the natural position. It should be borne in mind that the trajectory of flexion and extension of right lower limb joints are reversed in the left lower limb joints. For example, the right hip joint has a clockwise extension trajectory and anticlockwise flexion trajectory while the left hip joint has an anticlockwise extension trajectory and clockwise flexion trajectory. Abbreviations: L stands for left side, R for right side, H for hip, K for knee, and A for ankle.

(a)

(b)

(c)