Instrumental motion analysis systems for the evaluation of muscle overactivity: A point of view

•Instrumental motion analysis is important to improve understanding of the relationship between muscle overactivity and abnormal movement.•Instrumental motion analysis is useful to assess focal and global gait abnormalities.•Instrumental motion analysis is insufficiently used for the analysis of upper-limb movement because of the many degrees of freedom of the upper limb and the lack of a standardized task.