Abstract：
:Limb salvage surgeries are performed to treat a variety of lower limb pathologies and traumatic injuries. Individuals who have undergone limb salvage surgeries may require an ankle foot orthosis (AFO) to compensate for limb impairments and restore walking ability. Understanding the effects of AFO design parameters on gait biomechanics is important to refine AFO prescription criteria. In this study sagittal plane kinematic and kinetic data, muscle activity and alignment preference were examined as individuals treated for traumatic lower extremity injuries (N=12) walked over level ground with Plantarflexed (PF), Neutral, and Dorsiflexed (DF) aligned AFOs. A PF alignment resulted in earlier center of pressure progression (p<0.007) and a resulting decrease in both internal knee extensor moment (p<0.001) and quadriceps and soleus muscle activity (p<0.014) compared to the Neutral and DF alignments without affecting the lower limb support moment. A clear alignment preference was observed, with eight participants preferring the PF over the Neutral and DF alignments. The increase in internal knee extensor moment between the PF and DF alignments in the present study is consistent with previous investigations in other patient populations, suggesting a more DF aligned AFO may affect the knee joint moment similarly across patient populations. The results of this study suggest AFO alignment is an important design parameter that affects ankle and knee joint moments and muscle activity and should be carefully considered during AFO design and clinical fitting.
journal_name
J Biomechjournal_title
Journal of biomechanicsauthors
Brown SE,Russell Esposito E,Wilken JMdoi
10.1016/j.jbiomech.2017.06.037subject
Has Abstractpub_date
2017-08-16 00:00:00pages
51-57eissn
0021-9290issn
1873-2380pii
S0021-9290(17)30347-0journal_volume
61pub_type
杂志文章abstract：:Three different cyclist positions were evaluated with Computational Fluid Dynamics (CFD) and wind-tunnel experiments were used to provide reliable data to evaluate the accuracy of the CFD simulations. Specific features of this study are: (1) both steady Reynolds-averaged Navier-Stokes (RANS) and unsteady flow modellin...
journal_title：Journal of biomechanics
pub_type： 杂志文章
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更新日期：2010-05-07 00:00:00
abstract：:Active tension developed while cardiac muscle shortens has been studied extensively under afterloaded isotonic or isovelocity conditions. However, these are not true in vivo loading conditions. To obtain more physiological loading, we controlled sarcomere length to follow the time courses that we observed previously i...
journal_title：Journal of biomechanics
pub_type： 杂志文章
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更新日期：1997-02-01 00:00:00
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journal_title：Journal of biomechanics
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更新日期：2015-04-13 00:00:00
abstract：:We searched for the consequences of a maximal static foot inversion sustained until exhaustion on the post-exercise stationary upright standing and the proprioceptive control of the foot muscles. Twelve healthy subjects executed an unilateral maximal static foot inversion during which continuous power spectrum analyse...
journal_title：Journal of biomechanics
pub_type： 杂志文章
doi：10.1016/j.jbiomech.2013.04.005
更新日期：2013-06-21 00:00:00
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journal_title：Journal of biomechanics
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journal_title：Journal of biomechanics
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journal_title：Journal of biomechanics
pub_type： 杂志文章
doi：10.1016/j.jbiomech.2007.10.006
更新日期：2008-01-01 00:00:00
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journal_title：Journal of biomechanics
pub_type： 杂志文章
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更新日期：2004-08-01 00:00:00
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journal_title：Journal of biomechanics
pub_type： 杂志文章
doi：10.1016/0021-9290(93)90073-n
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journal_title：Journal of biomechanics
pub_type： 杂志文章
doi：10.1016/s0021-9290(00)00110-x
更新日期：2000-12-01 00:00:00
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journal_title：Journal of biomechanics
pub_type： 杂志文章
doi：10.1016/0021-9290(95)00131-x
更新日期：1996-06-01 00:00:00
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journal_title：Journal of biomechanics
pub_type： 杂志文章
doi：10.1016/s0021-9290(96)00043-7
更新日期：1997-03-01 00:00:00
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journal_title：Journal of biomechanics
pub_type： 杂志文章
doi：10.1016/s0021-9290(97)00040-7
更新日期：1997-08-01 00:00:00
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journal_title：Journal of biomechanics
pub_type： 杂志文章
doi：10.1016/j.jbiomech.2016.10.012
更新日期：2016-12-08 00:00:00
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journal_title：Journal of biomechanics
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doi：10.1016/j.jbiomech.2003.09.016
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journal_title：Journal of biomechanics
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journal_title：Journal of biomechanics
pub_type： 杂志文章
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journal_title：Journal of biomechanics
pub_type： 杂志文章
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journal_title：Journal of biomechanics
pub_type： 杂志文章
doi：10.1016/j.jbiomech.2008.09.017
更新日期：2008-12-05 00:00:00
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journal_title：Journal of biomechanics
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更新日期：2015-08-20 00:00:00
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pub_type： 临床试验,杂志文章,随机对照试验
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更新日期：1999-08-01 00:00:00
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更新日期：2017-01-04 00:00:00
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journal_title：Journal of biomechanics
pub_type： 杂志文章
doi：10.1016/0021-9290(88)90016-4
更新日期：1988-01-01 00:00:00
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journal_title：Journal of biomechanics
pub_type： 杂志文章
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更新日期：1984-01-01 00:00:00
