Defining the shape of the scapulothoracic gliding surface
- 35 Downloads
The aim of the study is to evaluate the difference in shape of the upper part and lower part of the Scapulothoracic Gliding Surface (STGS).
3D-CT images of the thoracic cage of 50 patients were created in MIMICS ®. Three anatomical landmarks (insertion m. serratus anterior on 5th rib; transverse process of 2th and 7th vertebra) were used as an anteroposterior cutting plane to define the STGS. The upper part of the STG was defined as rib 2–5 and the lower part as 5–8. Next, in MATLAB ®, a script was used to create the sphere with best fit for upper and lower parts of STGS. The Root-Square-Mean Error (RSME) (mm) between two closest points on the fitted sphere and the STGS of both parts were calculated to determine the goodness-of-fit.
The RSME was found to be significantly lower for the area ribs 2–5 (mean 7.85 mm, SD 1.86) compared the area of ribs 5–8 (mean 10.08 mm, SD 1.90).
The STGS of the upper thoracic wall (2–5) is more spherical shaped than the STGS of the lower thoracic wall (rib 5–8).
KeywordsAnatomy Ellipsoid Thorax Scapula Motion
We want to thank Emmanuel Audenaert for his technical support.
Casier: data collection. De Wilde: protocol/project development. Paquet: data collection and management, data analysis, manuscript writing, and editing. Van Den Broucke: data collection and management, data analysis, and manuscript writing. Van Houcke: data management. Van Tongel: protocol/project development and manuscript writing/editing.
Compliance with ethical standards
Conflict of interest
No conflict of interest.
Al participants were given informed consent.
All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
- 4.De Toledo JM, Loss JF, Janssen TW, Van Der Scheer TW, Alta TD, Willems WJ, Veeger D (2012) Kinematic evaluation of patients with total and reverse shoulder arthroplasty during rehabilitation exercises with different loads. Clin Biomech 27:793–800. https://doi.org/10.1016/j.clinbiomech.2012.04.009 CrossRefGoogle Scholar
- 8.Petrov Y (2009) Ellipsoid fit. The Mathworks Inc. https://www.mathworks.com/matlabcentral/fileexchange/24693-ellipsoid-fit. Accessed 1 Sept 2017
- 9.Preuschoft H, Schmidt M, Hayama S, Okada M (2003) The influence of three-dimensional movements of the forelimb on the shape of the thorax and its importance for erect body posture. Walk Upright 243:9–24Google Scholar
- 16.Wu G, van der Helm FCT, Veeger HEJ, Makhsous M, Van Roy P, Anglin C, Nagels J, Karduna AR, McQuade K, Wang XG, Werner FW, Buchholz B (2005) ISB recommendation on definitions of joint coordinate systems of various joints for the reporting of human joint motion—part II: shoulder, elbow, wrist and hand. J Biomech 38:981–992. https://doi.org/10.1016/j.jbiomech.2004.05.042 CrossRefPubMedGoogle Scholar