Grip force and force sharing in two different manipulation tasks with bottles

Cepriá-Bernal, Javier; Pérez-González, Antonio; Mora, Marta C.; Sancho-Bru, Joaquı́n L.

doi:10.1080/00140139.2016.1235233

Cited by 17 publications

(8 citation statements)

References 48 publications

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“…During grasping, the coordination of forces and moments among digits is affected by the locations (Li et al, 1998; Marneweck et al, 2016; Zatsiorsky et al, 2003) and the number (Budgeon et al, 2008) of fingers contacting as well as object properties and task features (Cepriá-Bernal et al, 2017). Previous studies showed that the location of each digit during natural grasp is varied precisely according to the shape and content of the bottle and the grasping task (Crajé et al, 2011; Lukos et al, 2007; Marneweck et al, 2016).…”

Section: Discussionmentioning

confidence: 99%

Force Control Strategy of Five-Digit Precision Grasping With Aligned and Unaligned Configurations

Chen

Hsu

et al. 2022

Hum Factors

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Objective To investigate the digit force control during a five-digit precision grasp in aligned (AG) and unaligned grasping (UG) configurations. Background The effects of various cylindrical handles for tools on power grasp performance have been previously investigated. However, there is little information on force control strategy of precision grasp to fit various grasping configurations. Method Twenty healthy young adults were recruited to perform a lift-hold-lower task. The AG and UG configurations on a cylindrical simulator with force transducers were adjusted for each individual. The applied force and moment, the force variability during holding, and force correlations between thumb and each finger were measured. Result No differences in applied force, force correlation, repeatability, and variability were found between configurations. However, the moments applied in UG were significantly larger than those in AG. Conclusion The force control during precision grasp did not change significantly across AG and UG except for the digit moment. The simulator is controlled efficiently with large moment during UG, which is thus the optimal configuration for precision grasping with a cylindrical handle. Further research should consider the effects of task type and handle design on force control, especially for individuals with hand disorders. Application To design the handle of specific tool, one should consider the appropriate configuration according to the task requirements of precision grasping to reduce the risk of accumulating extra loads on digits with a cylindrical handle.

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Section: Discussionmentioning

confidence: 99%

Force Control Strategy of Five-Digit Precision Grasping With Aligned and Unaligned Configurations

Chen

Hsu

et al. 2022

Hum Factors

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“…Bernal et al measured the grip force in different subjects through wearable capacitive pressure sensors in the fingers while performing a daily-life activity such as lifting a half-full 1-l bottle. The mean grip strength was 18.6 N [ 15 ]. Since every 10 N of grasp force transmits 26.4 N through the radius in the axial direction [ 16 ], the axial compression is approximately 49 N. Based on these estimates, we used 50 N for axial compression.…”

Section: Methodsmentioning

confidence: 99%

Biomechanical considerations in the design of patient-specific fixation plates for the distal radius

Caiti

Dobbe

Bervoets³

et al. 2018

Med Biol Eng Comput

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Use of patient-specific fixation plates is promising in corrective osteotomy of the distal radius. So far, custom plates were mostly shaped to closely fit onto the bone surface and ensure accurate positioning of bone segments, however, without considering the biomechanical needs for bone healing. In this study, we investigated how custom plates can be optimized to stimulate callus formation under daily loading conditions. We calculated implant stress distributions, axial screw forces, and interfragmentary strains via finite element analysis (FEA) and compared these parameters for a corrective distal radius osteotomy model fixated by standard and custom plates. We then evaluated these parameters in a modified custom plate design with alternative screw configuration, plate size, and thickness on 5 radii models. Compared to initial design, in the modified custom plate, the maximum stress was reduced, especially under torsional load (− 31%). Under bending load, implants with 1.9-mm thickness induced an average strain (median = 2.14%, IQR = 0.2) in the recommended range (2–10%) to promote callus formation. Optimizing the plate shape, width, and thickness in order to keep the fixation stable while guaranteeing sufficient strain to enhance callus formation can be considered as a design criteria for future, less invasive, custom distal radius plates. Graphical abstract ᅟ

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“…In vivo loading conditions in the human DRUJ have not been completely determined. Bernal et al [23] found that the mean grip force was 18.6 N when performing a daily life activity by measuring different subjects through wearable capacitive pressure sensors in the ngers. Putnam et al [24] reported that each 10 N of grip force would transmit 26 N of force through the distal ulna metaphysis in the wrist neutral position.…”

Section: Loading Force Settingsmentioning

confidence: 99%

Finite element analysis of different locking-plate fixation methods for the treatment of ulnar head fracture

Zhang

Shao

Yang

et al. 2021

Preprint

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Background: Ulnar head fractures are increasingly higher with the growing proportion of the elderly people. Failure to achieve a stable anatomic reduction of ulna head fracture may lead to a distal radioulnar joint (DRUJ) dysfunction and nonunion of the distal radius. Due to the lack of the postoperative reporting outcomes and the biomechanical studies, it has not been well established about the optimal management of the comminuted distal ulna head fracture. Hence, the purpose of this study is to use finite element analysis to explain the advantages and disadvantages of ulnar-side locking plate fixation compared with dorsal-side locking plate fixation and its screw arrangement in the treatment of ulnar head fractures.Methods: FE models of the ulnar head fracture and the models of ulnar-side locking plate and dorsal-side plate with two or three distal screws was constructed. In order to simulate forces acting on the ulnar and the osteosynthesis material during daily-life activity in subjects who underwent reconstructive surgery, we applied three loading conditions to each model, viz. 20 N axial compression, 50 N axial compression, 1 N∙m torsion moment, 1 N∙m lateral bending moments, and 1 N∙m extension bending moments. Under these conditions, values of the von Mises stress (VMS) distribution of the implant, peak VMS, the relative displacement of the head and shaft fragments between the fracture ends and the displacement and its direction of the models were investigated. Results: The stress values of ulnar-side plates were lower than those of dorsal-side plates. And the ulnar-plate fixation system also has smaller maximum displacement and relative displacement. When adding a screw in the middle hole of the ulnar head, the values of model displacement and the peak stress in fixation system are lower, but it may evidently concentrate the stress on the middle screw. Conclusions: In conclusion, our study indicated that ulnar-side locking plates resulted in a lower stress distribution in the plate and better stability than dorsal-side locking plates for ulnar head fracture fixation. Adding an additional screw to the ulnar head could increase the stability of the fixation system and provide an anti-torsion function. This study requires clinical confirmation of its practicality in the treatment of ulnar head fractures. This study requires clinical confirmation as to its practicality in the treatment of ulnar head fracture.

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Grip force and force sharing in two different manipulation tasks with bottles

Cited by 17 publications

References 48 publications

Force Control Strategy of Five-Digit Precision Grasping With Aligned and Unaligned Configurations

Force Control Strategy of Five-Digit Precision Grasping With Aligned and Unaligned Configurations

Biomechanical considerations in the design of patient-specific fixation plates for the distal radius

Finite element analysis of different locking-plate fixation methods for the treatment of ulnar head fracture

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