Related Experiment Video
Updated: Feb 19, 2026
Measuring 3D In-vivo Shoulder Kinematics using Biplanar Videoradiography
Published on: March 12, 2021
Intrapersonal and interpersonal evaluation of upper extremity kinematics
Artūras Linkel1, Inga Raudonytė2, James Shippen3
1Department of Biomechanics, Faculty of Mechanics, Vilnius Gediminas Technical University, Vilnius, Lithuania.
Background:
The quality of upper extremity (UE) function can be evaluated by measuring the kinematic parameters of patient movements.
Objective:
This investigation focused on finding the angles and angular velocity amplitudes of UE motions in healthy participants to compare with the experimental results of patients with a UE disability who are trying to recover previous movement conditions.
Methods:
The UE motions of 23 healthy adult volunteers were tested using a three-dimensional motion capture system and measuring hand segment motions. A simplified 7 degrees of freedom (DOF) human arm kinematic model created within MATLAB and used to process the experimental data.
Results:
The interpersonal CV (coefficients of variability) of left-side motions showed that the lowest CV of linear velocity amplitudes was at elbow flexion (4.2%), but the highest was at wrist extension (48.3%). The lowest and highest CV of angular velocity amplitudes were 19.6% and 55.7%, during shoulder adduction and wrist extension, respectively.
Conclusions:
High interpersonal CV may restrict the direct comparison of kinematic parameters of UE in different healthy and disabled persons.
