Characterizing human hand prehensile strength by force and moment wrench

@article{Wells2001CharacterizingHH,
  title={Characterizing human hand prehensile strength by force and moment wrench},
  author={Richard P. Wells and Michael Greig},
  journal={Ergonomics},
  year={2001},
  volume={44},
  pages={1392 - 1402}
}
Characterizing human hand capabilities or demand created by various occupational tasks or activities of daily living has been mainly accomplished by measuring the maximum force exerted on a force dynamometer in a number of standard grips, for example power, key pinch and tip pinch grips. A framework is proposed instead to characterize human hand prehensile strength in generic form by describing external force and moment wrench capability, where a wrench is a vector describing the forces and… 

Measurement of prehensile grasp capabilities by a force and moment wrench: Methodological development and assessment of manual workers

This work was undertaken to develop a methodology to assess complex, multi-axis hand exertions through the measurement of forces and moments exerted by the hand along and about three orthogonal axes originating at the grip centre; termed an external wrench.

A systematic exploration of distal arm muscle activity and perceived exertion while applying external forces and moments

Strong relationships were found between grip force alone without other actions and muscle activation, and when the hand was used to grip and transmit forces and moments to the environment, the relationships were much weaker.

Biomechanical Loading on the Hand, Wrist, and Forearm When Holding a Tablet Computer

Holding a tablet one-handed for an extended period of time, as might be found in some enterprise settings, was found to be very fatiguing for the hand; it would be prudent for such users to use both hands, support aids, frequent posture changes, or breaks involving rest or alternative tasks.

Forces associated with pneumatic power screwdriver operation: statics and dynamics

These models together should be useful for considering tool handle force in the selection and design of power screwdrivers, particularly for minimizing handle forces in the prevention of injuries and work related musculoskeletal disorders.

A device for assessment of hand and wrist coronal plane strength.

The ability to distinguish the test groups with reproducible results proves that the device fulfills all basic requirements; continued testing and development are warranted.

A soft-contact and wrench based approach to study grasp planning and execution.

The effects of posture on forearm muscle loading during gripping

The levels of extensor activation observed, especially during baseline and low level grip exertions, suggest a possible contributing mechanism to the development of lateral forearm muscle pain in the workplace.

Comparison of measurement methods for quantifying hand force

Predictions of grip force across all five tasks were poor and even for single tasks the predictions were not much better; in the field tasks are even more complex and the measurement characteristics might be expected to be less good.

Evaluating protocols for normalizing forearm electromyograms during power grip.

  • B. NgoR. Wells
  • Psychology
    Journal of electromyography and kinesiology : official journal of the International Society of Electrophysiological Kinesiology
  • 2016

The development and validation of equations to predict grip force in the workplace: contributions of muscle activity and posture

Detailed error analyses are presented to both improve upon previous studies and to allow an educated decision to be made on which muscles to monitor depending on expected force levels, costs and error deemed acceptable by the potential user.

References

SHOWING 1-10 OF 23 REFERENCES

Passive properties of the forearm musculature with reference to hand and finger postures.

Three-dimensional force analysis of finger joints in selected isometric hand functions.

An investigation of human palmar skin friction and the effects of materials, pinch force and moisture.

The coefficient of friction decreased with increased levels of pinch force for every material-moisture combination, and the coefficient ofriction for porous materials showed a significant increase when moisture was present.

Forces in the normal and abnormal hand

An analytc model for human hand force analysis was developed through anatomical study and measurement of multiple cadaveric specimens to determine muscle and joint force distributions under various isometric hand functions.

Grasp capability analysis of multifingered robot hands

A new method for testing isometric muscle strength under standardized conditions.

A new type of mechanoelectric force transducer (PRESSDUCTOR®, ASEA), modified and mounted on different types of stands and tested in 25 young healthy male volunteers proved to be reliable and easy to perform, and to have a high degree of precision.

The effect of the degree of elbow flexion on the maximum torques developed in pronation and supination of the right hand.

This work is a continuation of a previous investigation made by Darcus (1951) on the effect of different hand, elbow and shoulder positions on the maximum isometric torques that can be exerted in

Measuring wrist muscle strength.

  • J. VanSwearingen
  • Education
    The Journal of orthopaedic and sports physical therapy
  • 1983
The Cybex II and testing methods devised for using it demonstrated an acceptable consistency of measurement and indicated isometric torque and low velocity isokinetic torque are highly related.

On grasp choice, grasp models, and the design of hands for manufacturing tasks

Comparisons of the grasp taxonomy, the expert system, and grasp-quality measures derived from the analytic models reveal that the analytic measures are useful for describing grasps in manufacturing tasks despite the limitations in the models.