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Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
The adapted flexicurve ruler placed on the horse’s spine in a sagittal plane to measure thoracolumbar shape. The spirit level is aligned to horizontal and butterfly nut tightened to retain the flexicurve’s orientation to the horizontal, before removal to trace sagittal profile.