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Assessing Hand Function in Trans-Radial Amputees Wearing Myoelectric Hands: The Virtual Eggs Test (VET)
Summary
The Virtual Eggs Test (VET) assesses hand function by evaluating both gross and fine dexterity when handling fragile objects. This novel test shows promise for clinical and research applications in hand function assessment.
Area of Science:
- Biomedical Engineering
- Rehabilitation Science
- Human Motor Control
Background:
- Manual dexterity is crucial for hand function assessment in clinical practice and research.
- Existing assessments often focus on either gross or fine dexterity, with few evaluating both simultaneously.
Purpose of the Study:
- To introduce and validate the Virtual Eggs Test (VET), a novel assessment tool for evaluating combined gross and fine hand dexterity.
- To assess the concurrent validity, construct validity, and test-retest reliability of the VET.
Main Methods:
- The VET involves transporting virtual eggs with varying fragility thresholds, requiring controlled grasping force.
- Metrics measured include speed and success rate, combined into indexes for gross and fine dexterity.
- Concurrent validity and construct validity were tested on 30 trans-radial amputees with myoelectric hands; test-retest reliability was assessed on 35 healthy individuals.
Main Results:
- The VET effectively assesses hand function in handling breakable objects, utilizing both gross and fine dexterity.
- The study demonstrated the VET's concurrent validity, construct validity, and test-retest reliability.
Conclusions:
- The Virtual Eggs Test (VET) is a promising tool for evaluating comprehensive hand function, particularly in contexts involving fragile object manipulation.
- Further research is recommended to correlate VET performance with other established tests and activities of daily living for amputees.
