MnMotion Lite

Functionality & Mechanism

MnMotion Lite, developed by physical therapists, leverages a mobile device's onboard motion sensors to quantify shoulder joint range of motion. The system captures kinematic data during prescribed movements, including flexion, abduction, scapular plane elevation, and rotation. It records peak angular measurements for each session, maintains a longitudinal record of performance, and facilitates data export to clinicians via email as CSV or text files. The interface is designed for patient self-monitoring as part of a structured rehabilitation program.

Evidence & Research Context

• The app's design is grounded in biomechanical research identifying distinct alterations in scapulothoracic kinematics, such as decreased upward rotation, in individuals with shoulder impingement symptoms.
• Foundational research demonstrates that normal overhead arm elevation involves complex, coupled three-dimensional rotations at the sternoclavicular, acromioclavicular, and glenohumeral joints, underscoring the utility of multiplanar assessment.
• The measurement of distinct elevation planes (flexion, abduction, scapular plane) aligns with studies showing significant kinematic differences across these specific motions in healthy individuals.
• The authors of associated research note that abnormal movement patterns are correlated with altered muscle activation, particularly decreased serratus anterior activity, a common target for therapeutic exercise.

Intended Use & Scope

This tool is intended for patients to self-monitor shoulder range of motion as an adjunct to a professionally supervised rehabilitation program. It provides objective data to track progress but does not offer diagnostic information or generate treatment recommendations. Clinical consultation is required for the interpretation of results and the modification of therapeutic protocols.