Figure 1

Examples of the position during the assessment. (a) the subjects were asked to sit facing the examiner in a neutral position and to keep their forearm in the supine position, upper arms close to the chest wall, the elbow flexed 90°, upper limbs relaxed and fingers naturally semi-flexed during the median nerve scanning; (b) the subjects were asked to lie in the supine position. The ankles were positioned in slight plantar flexion and were slightly rotated externally and the lower extremity was in a neutral position during the tibial nerve scanning.