September 15, 2015


Functions of MotionReach®

Because MotionReach is based on the latest research in neuro-rehabilitation,
training with MotionReach leads to both greater and faster recovery.*

Patients using MotionReach complete a number of sessions. In each session, the patient first performs
a fixed performance test, and then participates in intensive and adaptive training. The adaptive reach
training of MotionReach provides semi-automated personalized e-rehabilitation of arm functions.

MotionReach offers three functions of training, testing, and reporting of movement skills.
During testing and training, movement quality is assessed with both the touch screen for accurate hand timing
and position, and with the Microsoft Kinect v2 for hand path, arm (shoulder, elbow, wrist), and trunk kinematics.

The clinician may not always be able to monitor the session, but MotionReach will. MotionReach can
be used alone in a semi-supervised clinical environment (either in the clinic or at home).

* In a published peer-reviewed study with a prototype of MotionReach, 16 individuals with chronic stroke with
mild to moderate impairments performed two sessions of unassisted intensive reach training, with 600 movements
per session. Training resulted in significant 1-month improvements in movement time (20% on average) and
movement smoothness (23% on average). In addition, there was a significant improvement in the Box and Block
test from baseline to 1-month retention test (23% on average).
See Park et al. Neural Rehabilitation and Repair, 2015.


MotionReach delivers training via presentations of targets or virtual objects displayed on the touch screen. Furthermore, it provides semi-automated and high-intensity arm motor training based on continuous accurate measurements of hand path and arm/trunk kinematics via a 3D camera. This allows for the objective assessment of reaching performance, the minimization of compensatory movements, and the administration of adaptive training. Adaptive training is based on previous performance in hand and arm movement spaces, and is operationalized by varying target positions/sizes and maximal movement time. Interactive and responsive feedback allows the patient to stay motivated throughout the session. The design of MotionReach is based on a method shown to have high clinical effectiveness.


MotionReach assesses movement quality during tests and training, in both hand trajectory space and arm joint space. The combination of accurate timing and hand position (from the touch screen) and accurate arm and trunk joint position (from the Microsoft Kinect v2) is crucial for improving arm and hand function while mitigating compensatory movements. Compensatory movements are detected via comparisons of affected movements to non-affected movements (“normative”) recorded during tests, with an emphasis on trunk movements, shoulder (scapular) elevation, and shoulder internal rotation.


Session-by-session and summary reports are generated based on arm use (number/frequency of movements), as well as hand and arm performance data for the patient, the clinician, and the health insurance providers. Training feedback has two forms: reward based on movement times, and movement feedback based on deviation from normative movements. Feedback is provided both after each movement (via animation, audio, and pre-recorded videos) and in summary graphs between training bouts and sessions. All data is securely stored in the Microsoft Azure Cloud.