The stimulus location and static compression affect the biodynamic interaction between the fingertip and probe in the vibrotactile test: 3D finite element simulations.
Wu-JZ; Krajnak-K; Welcome-DE; Dong-RG
Inter-Noise 2006. The 35th International Congress and Exposition on Noise Control Engineering, December 3-6, 2006, Honolulu, Hawaii. West Lafayette, IN: International Institute of Noise Control Engineering, 2007 Aug; 5:2989-2998
Vibrotactile thresholds at the fingertips are affected by a number of individual, environmental and testing factors. In the current study, we theoretically analyzed the effects of the contact location of the probe on the fingertip and the static pre-indentation on the dynamic deformation of the soft tissues of the fingertip in the vibrotactile tests using a nonlinear finite element model. The fingertip considered in the 3D finite element model is the distal phalanx, the portion from the finger distal to the distal interphalangeal (DIP) joint articulation. The fingertip is contacted by the probe at four different contact angles (15 degrees, 30 degrees, 45 degrees, and 60 degrees) and three different pre-indentations (0.5, 1.0, and 1.5 mm). Our analysis indicated that the fingertip/probe contact location may affect the vibrotactile threshold. The model predictions indicated that the location-dependence of the vibration exposure factors at the fingertip increase with increasing static pre-indentation.
Biomechanics; Biomechanical-modeling; Analytical-processes; Models; Analytical-models
National Institute for Occupational Safety and Health Engineering & Control Technology Branch 1095 Willowdale Road Morgantown, West Virginia 26505, USA
Disease and Injury: Musculoskeletal Disorders of the Upper Extremities
Inter-Noise 2006. The 35th International Congress and Exposition on Noise Control Engineering, December 3-6, 2006, Honolulu, Hawaii.