A comparison of the effect of age on levator ani and obturator internus muscle cross‐sectional areas and volumes in nulliparous women
dc.contributor.author | Morris, Vikky C. | en_US |
dc.contributor.author | Murray, Meghan P. | en_US |
dc.contributor.author | DeLancey, John O.L. | en_US |
dc.contributor.author | Ashton‐miller, James A. | en_US |
dc.date.accessioned | 2012-05-21T15:47:28Z | |
dc.date.available | 2013-06-11T19:15:47Z | en_US |
dc.date.issued | 2012-04 | en_US |
dc.identifier.citation | Morris, Vikky C.; Murray, Meghan P.; DeLancey, John O.L.; Ashton‐miller, James A. (2012). "A comparison of the effect of age on levator ani and obturator internus muscle crossâ sectional areas and volumes in nulliparous women ." Neurourology and Urodynamics 31(4): 481-486. <http://hdl.handle.net/2027.42/91125> | en_US |
dc.identifier.issn | 0733-2467 | en_US |
dc.identifier.issn | 1520-6777 | en_US |
dc.identifier.uri | https://hdl.handle.net/2027.42/91125 | |
dc.description.abstract | Aims Functional tests have demonstrated minimal loss of vaginal closure force with age. So we tested the null hypotheses that age neither affects the maximum cross‐sectional area (CSA) nor the volume of the levator muscle. Corresponding hypotheses were also tested in the adjacent obturator internus muscle, which served as a control for the effect of age on appendicular muscle in these women. Methods Magnetic resonance images of 15 healthy younger (aged 21–25 years) and 12 healthy older nulliparous women (aged >63 years) were selected to avoid the confounding effect of childbirth. Models were created from tracing outlines of the levator ani muscle in the coronal plane, and obturator internus in the axial plane using 3D Slicer v. 3.4. Muscle volumes were calculated using Slicer, while CSA was measured using Imageware™ at nine locations. The hypotheses were tested using repeated measures analysis of variance with P < 0.05 being considered significant. Results The effect of age did not reach statistical significance for the decrease in levator ani muscle maximum CSA or the decrease in volume (4.3%, P = 0.62 and 10.9%, 0.12, respectively). However, age did significantly adversely decrease obturator internus muscle maximum CSA and volume (24.5% and 28.2%, P < 0.001, respectively). Significant local age‐related changes were observed dorsally in both muscles. Conclusions Unlike the adjacent appendicular muscle, obturator internus, the levator ani muscle in healthy nullipara does not show evidence of significant age‐related atrophy. Neurourol. Urodynam. 31:481–486, 2012. © 2012 Wiley Periodicals, Inc. | en_US |
dc.publisher | Wiley Subscription Services, Inc., A Wiley Company | en_US |
dc.subject.other | Nullipara | en_US |
dc.subject.other | Sarcopenia | en_US |
dc.subject.other | Pelvic Floor | en_US |
dc.subject.other | Aging | en_US |
dc.title | A comparison of the effect of age on levator ani and obturator internus muscle cross‐sectional areas and volumes in nulliparous women | en_US |
dc.type | Article | en_US |
dc.rights.robots | IndexNoFollow | en_US |
dc.subject.hlbsecondlevel | Internal Medicine and Specialties | en_US |
dc.subject.hlbtoplevel | Health Sciences | en_US |
dc.description.peerreviewed | Peer Reviewed | en_US |
dc.contributor.affiliationum | Biomechanics Research Laboratory, Department of Mechanical Engineering, University of Michigan, GGB 3208, 2350 Hayward St, Ann Arbor, MI 48109‐2125. | en_US |
dc.contributor.affiliationum | Department of Mechanical Engineering, Institute of Gerontology, University of Michigan, Ann Arbor, Michigan | en_US |
dc.contributor.affiliationum | Department of Obstetrics and Gynecology, University of Michigan, Ann Arbor, Michigan | en_US |
dc.contributor.affiliationother | Franklin W. Olin College of Engineering, Needham, Massachusetts | en_US |
dc.contributor.affiliationother | University College London Hospital, London, England | en_US |
dc.identifier.pmid | 22378544 | en_US |
dc.description.bitstreamurl | http://deepblue.lib.umich.edu/bitstream/2027.42/91125/1/21208_ftp.pdf | |
dc.identifier.doi | 10.1002/nau.21208 | en_US |
dc.identifier.source | Neurourology and Urodynamics | en_US |
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dc.owningcollname | Interdisciplinary and Peer-Reviewed |
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