Related Experiment Video
Updated: Jun 20, 2025
09:36
Measurement of Spatial Stability in Precision Grip
Published on: June 4, 2020
3.2K
Real-time visual feedback can cue changes in grip force during electric hand tool operation
Brendan L Pinto1, Daniel Loewen2, Naveen Chandrashekar2
1Department of Kinesiology and Health Sciences, University of Waterloo, Canada.
Summary
Real-time visual feedback effectively reduced excessive grip force and muscle activity during electric hand tool use. This approach shows promise for preventing work-related musculoskeletal disorders in repetitive tasks.
Area of Science:
- Occupational Health
- Ergonomics
- Human Factors Engineering
Background:
- Repetitive hand tool use can lead to excessive grip force, increasing the risk of cumulative trauma disorders.
- Augmented feedback interventions are understudied for modifying grip force during electric hand tool operation.
Purpose of the Study:
- To assess the feasibility of real-time visual feedback for modifying grip force and forearm electromyography (EMG) during electric hand tool use.
- To investigate the influence of hand and tool orientation on the effectiveness of visual feedback.
Main Methods:
- Participants used an electric pistol-grip nut-runner to fasten bolts at various locations (low, high, overhead).
- Grip force and forearm muscle EMG were measured with and without real-time visual feedback.
- Data were analyzed to determine the effects of feedback and tool orientation.
Main Results:
- Visual feedback significantly decreased grip force by 36.1% and forearm EMG by 22.8-33.0%.
- Grip force and EMG varied by fastening location.
- Feedback effectiveness was consistent across different hand and tool orientations, with no significant interactions.
Conclusions:
- Real-time visual feedback is a viable method for reducing grip force during electric hand tool operation.
- Further research is required to optimize the implementation of visual feedback strategies for occupational settings.
Related Concept Videos
01:17Frictional Forces on Screws
1.2K
Screws are characterized by a helical ridge known as a thread wrapped around a cylindrical shaft. They are commonly used as fasteners to hold objects together or to transmit power and motion in machines. One type of screw that is particularly useful for transmitting power is the square-threaded screw.
A jack with a square-threaded screw is a mechanical device used to lift heavy loads by applying a force at its handle. When the force is applied, the screw turns, raising the load. The screw can...
A jack with a square-threaded screw is a mechanical device used to lift heavy loads by applying a force at its handle. When the force is applied, the screw turns, raising the load. The screw can...
1.2K
01:24Effects of feedback
543
Feedback in control systems plays a critical role in shaping various operational parameters, extending beyond simple error reduction to influence stability, bandwidth, gain, impedance, and sensitivity. Understanding these effects requires examining a basic feedback system characterized by defined input, output, error, and feedback signals.
Feedback significantly modifies the gain of a control system. The gain of a system without feedback is altered by a factor of one plus GH, where G represents...
Feedback significantly modifies the gain of a control system. The gain of a system without feedback is altered by a factor of one plus GH, where G represents...
543
01:05Static and Kinetic Frictional Force
15.8K
One of the simpler characteristics of sliding friction is that it is parallel to the contact surfaces between systems, and is always in a direction that opposes the motion or attempted motion of the systems relative to each other. If two systems are in contact and moving relative to one another, then the friction between them is called kinetic friction. For example, kinetic friction slows a hockey puck sliding on ice.
However, if two systems are in contact and are stationary relative to one...
However, if two systems are in contact and are stationary relative to one...
15.8K