Stroke Rehab Device Using Unaffected Limb Motion
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Solution Overview
Problem
Current stroke rehabilitation devices are complex and costly, limiting their use to only a few settings and failing to effectively harness brain activity from the unaffected side to aid recovery in affected arm movements, which is crucial for active rehabilitation processes.
Innovation Solution
Development of rehabilitative devices that utilize the motion of the unaffected limb to mirror and train the affected limb, leveraging the brain's motor system to enhance muscle control and recovery, allowing for cost-effective and user-friendly rehabilitation in various settings, including home environments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional stroke rehabilitation devices are used, then rehabilitation therapy can be provided, but the devices are complex and costly, limiting their use to only a few settings
Solution Approach 1:
The device creates a mechanical copy of the unaffected limb's motion to drive the affected limb. A simplified linkage mechanism replicates the movement patterns of the healthy arm, providing therapeutic stimulation to the affected arm without requiring complex robotic control systems or expensive sensors. This copying approach maintains rehabilitation effectiveness while dramatically reducing device complexity and cost.
Solution Approach 2:
The invention extracts only the essential rehabilitation function from complex robotic systems - the mechanical transmission of motion from the unaffected to the affected limb. By removing unnecessary components such as motors, sensors, computers, and control algorithms, the device achieves cost-effectiveness and simplicity while preserving the core therapeutic mechanism of active rehabilitation.
2Productivity
If complex robotic rehabilitation devices are used, then active rehabilitation can be provided, but they fail to effectively harness brain activity from the unaffected side to aid recovery
Solution Approach 1:
The device enables the unaffected limb to serve the affected limb by mechanically coupling the two arms. The healthy arm's motion automatically drives the affected arm through a linkage mechanism, harnessing the brain's intact motor pathways on the unaffected side to stimulate recovery in the affected arm. This self-service mechanism activates ipsilateral brain pathways without requiring external robotic control, improving rehabilitation efficiency while simplifying the device.
3Ease of operation
If passive movement approaches are used in early rehabilitation, then basic therapy can be provided, but they do not actively engage the patient's motor system for optimal recovery
Solution Approach 1:
Instead of the therapist or machine passively moving the affected arm, the invention inverts the approach by having the unaffected arm actively drive the affected arm through mechanical coupling. This inversion transforms passive therapy into active rehabilitation, engaging the patient's intact motor system to stimulate neural plasticity and improve recovery outcomes while maintaining ease of operation.
Data Source
AI summary
According to one embodiment, a rehabilitative training device for use with a stroke patient includes a first component that is operatively coupled to a first body part (unaffected body part) of the patient and a second component that is operatively coupled to a second body part (affected body part) of the patient. The first component and second component are operatively coupled to one another such that motion of the first component as a result of movement of the first body part by the user causes the second component and second body part to move in a symmetrical motion.