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. Author manuscript; available in PMC: 2009 Dec 23.
Published in final edited form as: Obstet Gynecol. 2006 Aug;108(2):324–332. doi: 10.1097/01.AOG.0000227786.69257.a8

Figure 1.

Figure 1

Model Development. A: mid-sagittal MR image. B: modeled element traced or projected on mid-sagittal MR image. C: lumped parameter biomechanical model. Pubovisceral muscle (PVM) is modeled as a spring in parallel with an active force generator. PS: pubic symphysis; SAC: sacrum; PM: perineal membrane; LA plate: levator plate; R: rectum; V: vagina; CL: cardinal ligament spring; US: uterosacral ligament spring; B: bladder; UT: uterus. Copyright Biomechanics Research Lab, University of Michigan, 2006