Kinematic analysis of upper extremity movement in stroke patients as a rehabilitation supporting tool
Abstract Background: Ischemic stroke often results in reduced mobility of the upper extremity and subsequent long-term disability. Evaluation of the effects of rehabilitation monitoring is often insufficient, while technological progress in 3D analysis application is more objective in the assessment of motor deficits. The aim of the study was to examine the use of kinematic analysis indicators for diagnosing the rehabilitation process in post-stroke patients. Methods: 20 ischemic stroke patients in the early post-stroke phase (up to three months after the stroke) took part in the study. The study tests were conducted at the beginning of the rehabilitation process and after its completion. The procedure comprised moving the index finger and reaching for four target points (closer, farther, contralaterally, ipsilaterally) placed on a table in front of the patient. The analysis of movement time and movement trajectory was carried out using the OptiTrack system. Movement time and movement smoothness (trajectory smoothness) were calculated with the use of normalized jerk score (JERK). Results: The JERK parameter changed significantly in three movement trajectory directions: closer (p ≤ 0.01; d = 1.82), further (p ≤ 0.05; d = 1.02), and contralaterally (p ≤ 0.05; d = 0.91). Conclusions: The results confirm the usefulness of the applied measurements in diagnosing the effects of rehabilitation of patients in the early post-stroke phase.Trial registration: (not applicable)