A Wearable Anti-Gravity Supplement to Therapy Does Not Improve Arm Function in Chronic Stroke: A Randomized Pilot...

Area of Science:

• Neuroscience
• Rehabilitation Medicine
• Biomedical Engineering

Background:

• Gravity significantly impacts arm movement in post-stroke hemiparesis, hindering recovery.
• A need exists for wearable devices supporting personalized therapy across various clinical activities.
• Existing rehabilitation methods lack sufficient support for gravity-compromised movements.

Purpose of the Study:

• To assess the safety, feasibility, and efficacy of anti-gravity therapy via the ExoNET device.
• To investigate the impact of gravity support on motor function in chronic stroke survivors.
• To evaluate patient experience with wearable anti-gravity technology in occupational therapy.

Main Methods:

• Pilot study involving 20 chronic stroke survivors.
• Six 45-minute occupational therapy sessions using the ExoNET device.
• Randomized control trial comparing gravity-support (treatment) vs. slack (control) conditions.
• Clinical, kinetic, kinematic, and patient-reported outcomes assessed by blinded raters.

Main Results:

• The treatment group showed significant improvement in Box and Blocks Test scores (ES=2.1, P=0.04).
• Direct kinetic analysis revealed reduced muscle activity during exploration (ES=-7.12%, P<0.005).
• No significant differences were observed in other standard clinical assessments between groups.

Conclusions:

• Anti-gravity therapy with ExoNET is safe and feasible for post-stroke rehabilitation.
• The device effectively provided anti-gravity support without restricting range of motion.
• Improvements in gross manual dexterity suggest potential benefits for specific functional outcomes.