title: Development of an anatomical wrist joint coordinate system to quantify motion during functional tasks.
abstract: The purpose of this study was to develop a three-dimensional (3D) motion analysis based anatomical wrist joint coordinate system for measurement of in-vivo wrist kinematics. The convergent validity and reliability of the 3D motion analysis implementation was quantified and compared with manual and electrogoniometry techniques on 10 cadaveric specimens. Fluoroscopic measurements were used as the reference. The 3D motion analysis measurements (mean absolute difference [MAD] = 3.6°) were significantly less different (P < .005) than manual goniometry (MAD = 5.7°) but not (P = .066, power = 0.45) electrogoniometry (MAD = 5.0°) compared with fluoroscopy. The intraclass correlation coefficient (ICC[2,1]) was highest for 3D motion analysis compared with manual and electrogoniometry, suggesting better reliability for this technique. To demonstrate the utility of this new wrist joint coordinate system, normative data from 10 healthy subjects was obtained while throwing a dart.
authors.affiliation: The Leon Root, M.D., Motion Analysis Lab, Hospital for Special Surgery, New York, NY.
authors.forename: Howard J
authors.initials: HJ
authors.lastname: Hillstrom
authors.forename: Rohit
authors.initials: R
authors.lastname: Garg
authors.forename: Andrew
authors.initials: A
authors.lastname: Kraszewski
authors.forename: Mark
authors.initials: M
authors.lastname: Lenhoff
authors.forename: Timothy
authors.initials: T
authors.lastname: Carter
authors.forename: Sherry I
authors.initials: SI
authors.lastname: Backus
authors.forename: Aviva
authors.initials: A
authors.lastname: Wolff
authors.forename: Grigory
authors.initials: G
authors.lastname: Syrkin
authors.forename: Richard
authors.initials: R
authors.lastname: Cheng
authors.forename: Scott W
authors.initials: SW
authors.lastname: Wolfe
mesh_terms: D059925:Anatomic Landmarks / Q000033:anatomy & histology*; D002102:Cadaver; D003198:Computer Simulation; D006801:Humans; D021621:Imaging, Three-Dimensional / Q000379:methods*; D008953:Models, Anatomic; D008954:Models, Biological; D016059:Range of Motion, Articular / Q000502:physiology*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D014955:Wrist Joint / Q000033:anatomy & histology* / Q000502:physiology*