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Master Thesis

Modélisation du plancher pelvien chez MH2 (Malapa Hominin 2)

Abstract : Introduction: MH2 (Malapa Hominin 2) is believed to be an Australopithecus female of the Australopithecus sediba genus. MH2 has a mosaic of both archaic and modern characters that may situate it at the likely transition between the large group of Australopithecus and that of modern Humans. The pelvic floor is the set of musculo-aponeurotic structures closing down the pelvis. Objectives: Model the pelvic floor of MH2 from the existing fossil pelvis model. Explore the anatomical impact of delivery on MH2’s pelvic floor by digital delivery simulations. Method: Pelvic floor modeling was performed using an imagery-derived human pelvic floor model using Avizo 7® software. Delivery simulations were then performed using a fetal skull model (obtained from Taung 1 measurements). These were conducted using Hypercrash® software. Results: The results of the various simulations shown that the highest points of tension were the pubic hooks of the various bundles of the levator ani, as well as the superficial transverse muscles. The foetal head couldn't go through the pelvic floor in any of the simulations. Conclusion: The simulations revealed important perineal stresses that may not allow a physiological and not traumatic delivery for the Australopithecus sediba. This study makes it possible to re-consider the most probable size of the foetal skull in A. sediba, and / or a greater flexibility of the pelvic floor in these Australopithecus.
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Submitted on : Wednesday, November 27, 2019 - 2:13:48 PM
Last modification on : Monday, July 6, 2020 - 4:04:38 PM


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  • HAL Id : dumas-02382906, version 1


Laury Ricard. Modélisation du plancher pelvien chez MH2 (Malapa Hominin 2). Gynécologie et obstétrique. 2019. ⟨dumas-02382906⟩



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