Reliability of upper extremity kinematics while performing different tasks in individuals with stroke

Area of Science:

• Rehabilitation science
• Biomechanics
• Neuroscience

Background:

• Current upper extremity assessments post-stroke often rely on subjective, qualitative measures.
• Objective, quantitative kinematic analysis of upper extremity movement is not widely established in stroke populations.

Purpose of the Study:

• To evaluate the reliability of upper extremity kinematic analysis in individuals with stroke.
• To compare kinematic measures between individuals post-stroke and healthy controls.

Main Methods:

• Participants (18 stroke, 9 healthy) performed reaching and grasping tasks over two days.
• Key metrics included movement time, peak velocity, index of curvature, trunk displacement, and maximum aperture.

Main Results:

• Most kinematic variables demonstrated moderate to high intraclass correlation coefficients.
• Low standard error of measurement values were observed for most measured variables.
• Kinematic analysis showed good reliability for upper extremity movement assessment in stroke survivors.

Conclusions:

• Kinematic analysis is a reliable and feasible tool for quantifying upper extremity movement in individuals post-stroke.
• Objective kinematic data can provide valuable insights into motor impairments and recovery after stroke.
• This methodology supports the integration of quantitative biomechanical assessments into stroke rehabilitation protocols.