Effects of different technical coordinate system definitions on the three dimensional representation of the glenohumeral joint centre

A.C. Campbell, Jacqueline Alderson, David Lloyd, Bruce Elliott

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    34 Citations (Scopus)

    Abstract

    This study aimed to find the most appropriatemarker location, or combination thereof, for the centre ofthe humeral head (Wang et al. in J Biomech 31: 899–908,1998) location representation during humeral motion. Tenmale participants underwent three MRI scans in three differenthumeral postures. Seven technical coordinatesystems (TCS) were defined from various combinations ofan acromion, distal upper arm and proximal upper armclusters of markers in a custom Matlab program. The CHHlocation was transformed between postures and thencompared with the original MRI CHH location. The resultsdemonstrated that following the performance of two near180_ humeral elevations, a combined acromion TCS andproximal upper arm TCS produced an average error of23 ± 9 mm, and 18 ± 4 mm, which was significantlysmaller (p\0.01) than any other TCS. A combination ofacromion and proximal upper arm TCSs should thereforebe used to reference the CHH location when analysingmovements incorporating large ranges of shoulder motion.
    Original languageEnglish
    Pages (from-to)543-550
    JournalMedical & Biological Engineering and Computing
    Volume47
    Issue number5
    DOIs
    Publication statusPublished - 2009

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