Creep Behavior of Passive Bovine Extraocular Muscle

Creep Behavior of Passive Bovine Extraocular Muscle

This paper characterized bovine extraocular muscles (EOMs) using creep, which represents long-term stretching induced by a constant force. After preliminary optimization of testing conditions, 20 fresh EOM samples were subjected to four different loading rates of 1.67, 3.33, 8.33, and 16.67%/s, afte...

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Main Authors: Lawrence Yoo, Hansang Kim, Andrew Shin, Vijay Gupta, Joseph L. Demer
Format: Article
Language:English
Published: Hindawi Limited 2011-01-01
Series:Journal of Biomedicine and Biotechnology
Online Access:http://dx.doi.org/10.1155/2011/526705
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spelling doaj-8632df7fe84a43339ffc1034cb7226272020-11-24T21:45:15ZengHindawi LimitedJournal of Biomedicine and Biotechnology1110-72431110-72512011-01-01201110.1155/2011/526705526705Creep Behavior of Passive Bovine Extraocular MuscleLawrence Yoo0Hansang Kim1Andrew Shin2Vijay Gupta3Joseph L. Demer4Department of Ophthalmology, Jules Stein Eye Institute, University of California Los Angeles, 100 Stein Plaza, UCLA, Los Angeles, CA 90095-7002, USADepartment of Mechanical Engineering, University of California, Los Angeles, CA, USADepartment of Ophthalmology, Jules Stein Eye Institute, University of California Los Angeles, 100 Stein Plaza, UCLA, Los Angeles, CA 90095-7002, USADepartment of Mechanical Engineering, University of California, Los Angeles, CA, USADepartment of Ophthalmology, Jules Stein Eye Institute, University of California Los Angeles, 100 Stein Plaza, UCLA, Los Angeles, CA 90095-7002, USAThis paper characterized bovine extraocular muscles (EOMs) using creep, which represents long-term stretching induced by a constant force. After preliminary optimization of testing conditions, 20 fresh EOM samples were subjected to four different loading rates of 1.67, 3.33, 8.33, and 16.67%/s, after which creep was observed for 1,500 s. A published quasilinear viscoelastic (QLV) relaxation function was transformed to a creep function that was compared with data. Repeatable creep was observed for each loading rate and was similar among all six anatomical EOMs. The mean creep coefficient after 1,500 seconds for a wide range of initial loading rates was at 1.37±0.03 (standard deviation, SD). The creep function derived from the relaxation-based QLV model agreed with observed creep to within 2.7% following 16.67%/s ramp loading. Measured creep agrees closely with a derived QLV model of EOM relaxation, validating a previous QLV model for characterization of EOM biomechanics.http://dx.doi.org/10.1155/2011/526705
collection DOAJ
language English
format Article
sources DOAJ
author Lawrence Yoo
Hansang Kim
Andrew Shin
Vijay Gupta
Joseph L. Demer
spellingShingle Lawrence Yoo
Hansang Kim
Andrew Shin
Vijay Gupta
Joseph L. Demer
Creep Behavior of Passive Bovine Extraocular Muscle
Journal of Biomedicine and Biotechnology
author_facet Lawrence Yoo
Hansang Kim
Andrew Shin
Vijay Gupta
Joseph L. Demer
author_sort Lawrence Yoo
title Creep Behavior of Passive Bovine Extraocular Muscle
title_short Creep Behavior of Passive Bovine Extraocular Muscle
title_full Creep Behavior of Passive Bovine Extraocular Muscle
title_fullStr Creep Behavior of Passive Bovine Extraocular Muscle
title_full_unstemmed Creep Behavior of Passive Bovine Extraocular Muscle
title_sort creep behavior of passive bovine extraocular muscle
publisher Hindawi Limited
series Journal of Biomedicine and Biotechnology
issn 1110-7243
1110-7251
publishDate 2011-01-01
description This paper characterized bovine extraocular muscles (EOMs) using creep, which represents long-term stretching induced by a constant force. After preliminary optimization of testing conditions, 20 fresh EOM samples were subjected to four different loading rates of 1.67, 3.33, 8.33, and 16.67%/s, after which creep was observed for 1,500 s. A published quasilinear viscoelastic (QLV) relaxation function was transformed to a creep function that was compared with data. Repeatable creep was observed for each loading rate and was similar among all six anatomical EOMs. The mean creep coefficient after 1,500 seconds for a wide range of initial loading rates was at 1.37±0.03 (standard deviation, SD). The creep function derived from the relaxation-based QLV model agreed with observed creep to within 2.7% following 16.67%/s ramp loading. Measured creep agrees closely with a derived QLV model of EOM relaxation, validating a previous QLV model for characterization of EOM biomechanics.
url http://dx.doi.org/10.1155/2011/526705
work_keys_str_mv AT lawrenceyoo creepbehaviorofpassivebovineextraocularmuscle
AT hansangkim creepbehaviorofpassivebovineextraocularmuscle
AT andrewshin creepbehaviorofpassivebovineextraocularmuscle
AT vijaygupta creepbehaviorofpassivebovineextraocularmuscle
AT josephldemer creepbehaviorofpassivebovineextraocularmuscle
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