A method for in-vivo kinematic analysis of the forearm

Shian Chao Tay, Roger van Riet, Tomita Kazunari, Matthew F. Koff, Kimberly K. Amrami, Kai N. An, Richard A. Berger

Research output: Contribution to journalArticle

22 Citations (Scopus)

Abstract

Purpose: To develop a method for in-vivo kinematic study of normal forearm rotation using computed tomographic (CT) images and a custom apparatus which allows for control of amount of forearm rotation. Methods: The forearm of one asymptomatic volunteer was CT-scanned in five positions: neutral, 60° pronation, maximal pronation, 60° supination, and maximal supination. Surface registration of the pronated/supinated image datasets with the neutral position was performed. The resulting transformation matrices were decomposed into finite helical axis (FHA) parameters. Kinematics were expressed as motion of the radius relative to the ulna. Results: The axes of the forearm passed through the volar region of the radial head at the proximal radioulnar joint (PRUJ), extending towards the dorsal region of the ulnar head at the distal radioulnar joint (DRUJ). Distinct FHAs were calculated for each forearm position analyzed relative to neutral rotation. Forearm pronation FHAs were different from forearm supination FHAs. Conclusions: Our experimental methodology is capable of describing the in-vivo kinematics of the forearm with good accuracy and reliability. Future in-vivo studies would need to be performed using a larger sample size to further validate our preliminary results. An ideal clinical application of this methodology would be in the comparative study of patients with forearm dysfunction.

Original languageEnglish (US)
Pages (from-to)56-62
Number of pages7
JournalJournal of Biomechanics
Volume41
Issue number1
DOIs
StatePublished - 2008

Fingerprint

Biomechanical Phenomena
Forearm
Kinematics
Pronation
Supination
Joints
Ulna
Sample Size
Volunteers
Head

Keywords

  • Helical and screw-displacement axis analysis
  • In vivo computed tomography
  • Proximal and distal radioulnar joint
  • Three-dimensional forearm axis of rotation

ASJC Scopus subject areas

  • Orthopedics and Sports Medicine

Cite this

Tay, S. C., van Riet, R., Kazunari, T., Koff, M. F., Amrami, K. K., An, K. N., & Berger, R. A. (2008). A method for in-vivo kinematic analysis of the forearm. Journal of Biomechanics, 41(1), 56-62. https://doi.org/10.1016/j.jbiomech.2007.07.019

A method for in-vivo kinematic analysis of the forearm. / Tay, Shian Chao; van Riet, Roger; Kazunari, Tomita; Koff, Matthew F.; Amrami, Kimberly K.; An, Kai N.; Berger, Richard A.

In: Journal of Biomechanics, Vol. 41, No. 1, 2008, p. 56-62.

Research output: Contribution to journalArticle

Tay, SC, van Riet, R, Kazunari, T, Koff, MF, Amrami, KK, An, KN & Berger, RA 2008, 'A method for in-vivo kinematic analysis of the forearm', Journal of Biomechanics, vol. 41, no. 1, pp. 56-62. https://doi.org/10.1016/j.jbiomech.2007.07.019
Tay SC, van Riet R, Kazunari T, Koff MF, Amrami KK, An KN et al. A method for in-vivo kinematic analysis of the forearm. Journal of Biomechanics. 2008;41(1):56-62. https://doi.org/10.1016/j.jbiomech.2007.07.019
Tay, Shian Chao ; van Riet, Roger ; Kazunari, Tomita ; Koff, Matthew F. ; Amrami, Kimberly K. ; An, Kai N. ; Berger, Richard A. / A method for in-vivo kinematic analysis of the forearm. In: Journal of Biomechanics. 2008 ; Vol. 41, No. 1. pp. 56-62.
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AU - An, Kai N.

AU - Berger, Richard A.

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AB - Purpose: To develop a method for in-vivo kinematic study of normal forearm rotation using computed tomographic (CT) images and a custom apparatus which allows for control of amount of forearm rotation. Methods: The forearm of one asymptomatic volunteer was CT-scanned in five positions: neutral, 60° pronation, maximal pronation, 60° supination, and maximal supination. Surface registration of the pronated/supinated image datasets with the neutral position was performed. The resulting transformation matrices were decomposed into finite helical axis (FHA) parameters. Kinematics were expressed as motion of the radius relative to the ulna. Results: The axes of the forearm passed through the volar region of the radial head at the proximal radioulnar joint (PRUJ), extending towards the dorsal region of the ulnar head at the distal radioulnar joint (DRUJ). Distinct FHAs were calculated for each forearm position analyzed relative to neutral rotation. Forearm pronation FHAs were different from forearm supination FHAs. Conclusions: Our experimental methodology is capable of describing the in-vivo kinematics of the forearm with good accuracy and reliability. Future in-vivo studies would need to be performed using a larger sample size to further validate our preliminary results. An ideal clinical application of this methodology would be in the comparative study of patients with forearm dysfunction.

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