Analysis of Musculoskeletal Loading in an Index Finger During Tapping

Details

• Personal Author:
  An KN ; Cutlip, Robert G. ; Dong, Ren G. ; Krajnak, Kristine M. ; Welcome, Daniel E. ; Wu, John Z.
• Description:
  Since musculoskeletal disorders of the upper extremities are believed to be associated with repetitive excessive muscle force production in the hands, understanding the time-dependent muscle forces during key tapping is essential for exploring the mechanisms of disease initiation and development. In the current study, we have simulated the time-dependent dynamic loading in the muscle/tendons in an index finger during tapping. The index finger model is developed using a commercial software package AnyBody, and it contains seven muscle/tendons that connect the three phalangeal finger sections. Our simulations indicate that the ratios of the maximal forces in flexor digitorum superficialis (FS) and flexor digitorum profundus (FP) tendons to the maximal force at the fingertip are 0.95 and 2.9, respectively, which agree well with recently published experimental data. The time sequence of the finger muscle activation predicted in the current study is consistent with the EMG data in the literature. The proposed model will be useful for bioengineers and ergonomic designers to improve keyboard design minimizing musculoskeletal loadings in the fingers. [Description provided by NIOSH]
• Subjects:
  Biomechanical Phenomena Cumulative Trauma Disorders Ergonomics Musculoskeletal Diseases Musculoskeletal System Occupational Health Safety
• Keywords:
  Biomechanical-modeling Biomechanics Cumulative-trauma Cumulative-trauma-disorders Models Musculoskeletal-system Musculoskeletal-system-disorders Repetitive-work
• ISSN:
  0021-9290
• Document Type:
  Text
• Genre:
  Journal Article
• Place as Subject:
  OSHA Region 3 ; West Virginia
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Division:
  HELD - Health Effects Laboratory Division
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Volume:
  41
• Issue:
  3
• NIOSHTIC Number:
  nn:20033528
• Citation:
  J Biomech 2008 Mar; 41(3):668-676
• Contact Point Address:
  John Z. Wu, CDC, NIOSH, 1095 Willowdale Rd,MS 2027, Morgantown, WV 26505
• Email:
  jwu@cdc.gov
• Federal Fiscal Year:
  2008
• Peer Reviewed:
  True
• Source Full Name:
  Journal of Biomechanics
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:e8f8fc3ecb95196e7bb816c97cce1a8e6fa61eb9b4933e5a5d8007e957b1c7dea2e066d635841f991089ae4e86dd0572babed46bc4ae332f2d3e46e79f98d98e
• Download URL:
  https://stacks.cdc.gov/view/cdc/189066/cdc_189066_DS1.pdf
• File Type:
  [PDF - 476.42 KB ]