biostudies-literatureUnknown14(3)Matsumoto H(1) Objective: To evaluate the usefulness of a three-dimensional motion-analysis system (AKIRA^®) as a quantitative measure of motor symptoms in patients with Parkinson's disease (PD). (2) Method: This study included 48 patients with PD. We measured their motion during 2 m of walking using AKIRA^®, we calculated the tilt angles of the neck and trunk, ankle height, and gait speed, then we compared these parameters with the MDS-UPDRS and the Hoehn and Yahr scale. Furthermore, we measured these AKIRA indicators before and after 1 year of observation. (3) Results: The forward tilt angle of the neck showed a strong correlation with the scores on parts II, III, and the total MDS-UPDRS, and the tilt angle of the trunk showed a moderate correlation with those measures. The lateNeurology international727-737https://www.ebi.ac.uk/biostudies/studies/S-EPMC9504699biostudies-literatureThe Forward and Lateral Tilt Angle of the Neck and Trunk Measured by Three-Dimensional Gait and Motion Analysis as a Candidate for a Severity Index in Patients with Parkinson's Disease.PMC9504699Mizukami HSato TMatsumoto HMaki FTanabe KYamauchi JShiraishi MKaburagi MYamano YHigashi AHino SfalseThe Forward and Lateral Tilt Angle of the Neck and Trunk Measured by Three-Dimensional Gait and Motion Analysis as a Candidate for a Severity Index in Patients with Parkinson's Disease.(1) Objective: To evaluate the usefulness of a three-dimensional motion-analysis system (AKIRA^®) as a quantitative measure of motor symptoms in patients with Parkinson's disease (PD). (2) Method: This study included 48 patients with PD. We measured their motion during 2 m of walking using AKIRA^®, we calculated the tilt angles of the neck and trunk, ankle height, and gait speed, then we compared these parameters with the MDS-UPDRS and the Hoehn and Yahr scale. Furthermore, we measured these AKIRA indicators before and after 1 year of observation. (3) Results: The forward tilt angle of the neck showed a strong correlation with the scores on parts II, III, and the total MDS-UPDRS, and the tilt angle of the trunk showed a moderate correlation with those measures. The late2022-01-01T00:00:00Z2022 Sep2025-04-18T22:32:46.788Z2024-11-07T00:50:21.695ZS-EPMC95046993613599610.3390/neurolint14030061