In patients with Parkinson’s disease, motor assessment is an important issue in evaluating disease progression or the efficacy of therapy. Based on the progresses of imaging capture, image processing and analyses, the quantified evaluation of postures and gaits is currently becoming increasingly popular. We used the AKIRA® system for three-dimensional evaluation of body movements of patients with Parkinson’s disease. The three-dimensional analysis of gait motion was compared with the MDS-UDPRS, and its usefulness as an evaluation index was examined. Results showed that the forward and side tilt angle of neck and trunk measured by AKIRAⓇ can be a candidate for a quantitative severity index in patients with PD. View this paper