Position Sense, Force Control and Pain Intensity in Basal Thumb Osteoarthritis

Forty-five subjects over 18 with thumb CMC joint OA in the dominant hand grade 1-3 according o the Eaton Classification Stage will be evaluated for thumb active joint position sense (JPS) test and Force sense test to measure proprioception function. For measurement of JPS, the subjects will blindfolded and repositioned their thumb to a target position, which will be determined by the examiner previously. For force sense, participants will should reproduce pinch force measure with dynamometer. The severity of pain with activity will be measured according to the visual analog scale (VAS).