Articular facets of vertebrae: (a) cervical; (b) thoracic; (c) lumbar Articular facets of vertebrae: (a) cervical; (b) thoracic; (c) lumbar. (S.A.F. = Superior articular facet. I.A.F. = Inferior articular facet.) Source: Chapter 9. The Spinal Column and Thorax, Kinesiology: Scientific Basis of Human Motion, 11e Citation: Hamilton N, Weimar W, Luttgens K. Kinesiology: Scientific Basis of Human Motion, 11e; 2008 Available at: http://accessphysiotherapy.mhmedical.com/DownloadImage.aspx?image=/data/books/hami11/hami11_c009f006b.gif&sec=41566142&BookID=446&ChapterSecID=41564584&imagename= Accessed: March 04, 2018 Copyright © 2018 McGraw-Hill Education. All rights reserved