Dependency coefficient in computerized GALS examination utilizing motion analysis techniques

ABSTRACT

The GALS [Gait, Arms, Legs and Spine] examination is a compact version of standard procedures used by rheumatologists to determine musculoskeletal disorders in patients. Computerization of such a clinical procedure is necessary to ensure an objective evaluation. This article presents the first steps in such an approach by outlining a procedure to use motion analysis techniques as a new method for GALS examination. A 3D motion pattern was obtained from two subject groups using a six camera motion analysis system. The range of motion associated with GALS was consequently determined using a MATLAB program. The range of motion [ROM] of the two subject groups was determined, the validity of the approach was outlined, and the symmetry of movement on both sides of the body was quantified through introduction of a dependency coefficient. Analysis of GALS examination and diagnosis of musculoskeletal problems could be addressed more accurately and reliably by adopting motion analysis techniques. Furthermore, introduction of a dependency coefficient offers a wide spectrum of prospective applications in neuromuscular studies