N D Barnett1, R D Duncan, G R Johnson. 1. Department of Mechanical, Materials and Manufacturing Engineering, University of Newcastle Upon Tyne, UK.
Abstract
OBJECTIVE: To validate a system, using electromagnetic movement sensors, for the simultaneous measurement of scapular and humeral positions. DESIGN: The study was designed to analyse the repeatability and to quantify the inherent measurement errors, using two observers to measure the movements of five normal subjects. BACKGROUND: Following an earlier study of a system to measure three dimensional scapula motion, the method has been developed to incorporate simultaneous measurement of humeral and scapular position using a new design of scapula locator and a two-channel measurement system. METHODS: The system was used to measure the scapula movements accompanying abduction of the shoulder. The scapula locator was applied at 10 degrees intervals of abduction. This was measured initially using a fluid filled goniometer, but, in a second part of the study, using an additional motion sensor. RESULTS: In the single channel study, the 95% confidence intervals were less than 4 degrees and 10 mm. When simultaneous measurement of arm position was performed the confidence intervals were little changed. CONCLUSIONS: A new system for the measurement of scapulohumeral relationships has been shown to have good inter-and intraobserver reliability. This study opens the way for a full investigation of the scapula motion accompanying three dimensional shoulder motion in both normal subjects and in patients having shoulder pathology.
OBJECTIVE: To validate a system, using electromagnetic movement sensors, for the simultaneous measurement of scapular and humeral positions. DESIGN: The study was designed to analyse the repeatability and to quantify the inherent measurement errors, using two observers to measure the movements of five normal subjects. BACKGROUND: Following an earlier study of a system to measure three dimensional scapula motion, the method has been developed to incorporate simultaneous measurement of humeral and scapular position using a new design of scapula locator and a two-channel measurement system. METHODS: The system was used to measure the scapula movements accompanying abduction of the shoulder. The scapula locator was applied at 10 degrees intervals of abduction. This was measured initially using a fluid filled goniometer, but, in a second part of the study, using an additional motion sensor. RESULTS: In the single channel study, the 95% confidence intervals were less than 4 degrees and 10 mm. When simultaneous measurement of arm position was performed the confidence intervals were little changed. CONCLUSIONS: A new system for the measurement of scapulohumeral relationships has been shown to have good inter-and intraobserver reliability. This study opens the way for a full investigation of the scapula motion accompanying three dimensional shoulder motion in both normal subjects and in patients having shoulder pathology.
Authors: A M Hill; A M J Bull; R J Dallalana; A L Wallace; G R Johnson Journal: Knee Surg Sports Traumatol Arthrosc Date: 2007-04-13 Impact factor: 4.342
Authors: Josien C van den Noort; Suzanne H Wiertsema; Karin M C Hekman; Casper P Schönhuth; Joost Dekker; Jaap Harlaar Journal: Med Biol Eng Comput Date: 2014-09-06 Impact factor: 2.602
Authors: H M Vermeulen; M Stokdijk; P H C Eilers; C G M Meskers; P M Rozing; T P M Vliet Vlieland Journal: Ann Rheum Dis Date: 2002-02 Impact factor: 19.103