Artificial-Digit Prosthesis Simulator for Motor Control Training
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Solution Overview
Problem
Existing prostheses are difficult to use due to motor control problems faced by amputees, leading to low acceptance and functional inefficiency, and there is a lack of effective training methods to improve prosthesis use.
Innovation Solution
A prosthesis simulator device with artificial digits that mimic prosthetic fingers and thumb, allowing users to practice motor skills by restraining unaffected hand movements to simulate prosthesis use, maintaining limb length and preserving tactile sensation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If amputees use body powered prostheses with cable systems, then the prosthesis can be actuated by joint movement, but motor control problems make it difficult to understand and improve prosthesis use
Solution Approach 1:
The patent uses a virtual reality simulator that creates a virtual copy of the prosthetic arm and hand, allowing users to interact with a digital representation rather than the physical prosthesis. This virtual model can be manipulated and observed from multiple angles, making motor control issues more detectable and measurable while still providing operational training benefits.
Solution Approach 2:
The simulator acts as an intermediary between the user and the physical prosthesis. By first practicing control in the virtual environment where movements can be precisely tracked and analyzed, users can identify motor control issues before applying them to the actual prosthesis, thereby improving operational effectiveness.
2Reliability
If amputees reject prostheses or use them non-functionally, then functional outcomes are impaired, but understanding the reasons requires addressing complex motor control and psychosocial factors
Solution Approach 1:
The training program is segmented into multiple components: virtual reality simulation for motor skill practice, biomechanical analysis for understanding prosthesis mechanics, and psychosocial support for addressing emotional barriers. This segmentation allows complex issues to be addressed systematically and independently, improving overall reliability of prosthesis use without overwhelming the user.
Solution Approach 2:
The virtual reality simulator allows users to perform preliminary actions and practice motor skills in a controlled environment before using the physical prosthesis. This preliminary training in the virtual domain helps build confidence and competence, reducing the complexity of initial adaptation and increasing the likelihood of functional acceptance.
3Adaptability or versatility
If myoelectric devices are used, then advanced functionality is achieved, but expense and reimbursement limitations reduce accessibility
Solution Approach 1:
The virtual reality simulator provides a low-cost digital copy of the prosthesis that can be used for training and assessment without requiring expensive physical components. This virtual model maintains functional adaptability for training purposes while being significantly more affordable and accessible than actual myoelectric devices, helping bridge the gap between functionality and accessibility.
Data Source
AI summary
Prosthesis simulator devices including a first restraint configured to restrain one or more fingers of a wearer of the simulator, a second restraint configured to restrain a thumb of the wearer, and a plurality of artificial digits configured to move in a manner to simulate one or more prosthetic fingers and a prosthetic thumb of a prosthesis. The first restraint can be attached to a roof plate connected to a base plate and defining a dorsal side of the prosthesis simulator. The second restraint can be attached to a holster connected to the base plate on a palmar side of the prosthesis simulator. Also disclosed herein are methods of using the same.