Effect of novel training to normalize altered finger force direction post-stroke: study protocol for a double-blind...

Area of Science:

• Neuroscience
• Rehabilitation Medicine
• Biomechanics

Background:

• Effective hand function relies on precise 3D movement and force control.
• Current physical rehabilitation often overlooks 3D force control training for hands.
• A novel visual feedback tool for 3D finger force has been developed to address this gap.

Purpose of the Study:

• To evaluate the efficacy of training with a 3D finger force visual feedback tool for restoring hand function in stroke survivors.
• To determine if explicit training of finger force direction improves motor control and hand function post-stroke.

Main Methods:

• A double-blind randomized controlled trial involving 18 training sessions.
• Participants practiced generating volitional finger force in various directions and magnitudes.
• Experimental group received feedback on force direction and magnitude; control group received magnitude feedback only.

Main Results:

• Primary outcome: Hand function measured by the Action Research Arm Test.
• Secondary outcomes: Box and Block Test, Stroke Impact Scale, force direction ability, muscle activation, and qualitative interviews.
• The study protocol is registered under NCT03995069.

Conclusions:

• The study will determine if training finger force direction enhances motor control in stroke survivors.
• Findings are expected to deepen the understanding of neuromuscular processes in hand function recovery.
• Results will inform future rehabilitation strategies for stroke-induced hand impairments.