Kapandji thumb opposition. Second, our method allowed the detection of the pronation angle impairment due to CTS easily, non-invasively, and three-dimensionally and represented it numerically. Thumb opposition is vital for hand function and involves pronation and palmar abduction. Some studies have addressed the impact of thumb range of movement on activities of daily living [ 6 ]. Third, six patients who used canes or walkers were included because the control group consisted of patients with hip osteoarthritis rather than healthy volunteers. In vivo pilot study evaluating the thumb carpometacarpal joint during circumduction. The opposition test consists of touching the four long fingers with the tip of the thumb: We recruited 16 adult rv parks with CTS and thenar atrophy before surgery CTS group, 27 hands and 16 healthy volunteers control group, 32 hands between June and June Upon recruitment, we obtained information from the patients regarding their chief complaint and the trauma history of their hands.