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Ankle biomechanics during impact lan...

Self, Brian Patrick.

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Ankle biomechanics during impact landings on uneven surfaces.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Ankle biomechanics during impact landings on uneven surfaces./
Author:	Self, Brian Patrick.
Description:	187 p.
Notes:	Source: Dissertation Abstracts International, Volume: 57-10, Section: B, page: 6395.
Contained By:	Dissertation Abstracts International57-10B.
Subject:	Engineering, Biomedical. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=9710168
ISBN:	0591176300

Ankle biomechanics during impact landings on uneven surfaces.
Self, Brian Patrick.

Ankle biomechanics during impact landings on uneven surfaces. - 187 p.

Source: Dissertation Abstracts International, Volume: 57-10, Section: B, page: 6395.

Thesis (Ph.D.)--The University of Utah, 1996.

Inversion sprains of the lateral ankle ligaments are one of the most common of all sporting injuries. The goals of the current research were to develop a cadaveric test system that accurately mimicked a drop landing and to determine strains and strain rates in the anterior talofibular (ATFL) and calcaneofibular (CFL) ligaments during an inversion sprain.

ISBN: 0591176300Subjects--Topical Terms:

1017684
Engineering, Biomedical.

Ankle biomechanics during impact landings on uneven surfaces.
LDR:03131nmm 2200313 4500 001 1843017
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020 $a 0591176300
035 $a (UnM)AAI9710168
035 $a AAI9710168
040 $a UnM $c UnM
100 1 $a Self, Brian Patrick. $3 1931260
245 1 0 $a Ankle biomechanics during impact landings on uneven surfaces.
300 $a 187 p.
500 $a Source: Dissertation Abstracts International, Volume: 57-10, Section: B, page: 6395.
502 $a Thesis (Ph.D.)--The University of Utah, 1996.
520 $a Inversion sprains of the lateral ankle ligaments are one of the most common of all sporting injuries. The goals of the current research were to develop a cadaveric test system that accurately mimicked a drop landing and to determine strains and strain rates in the anterior talofibular (ATFL) and calcaneofibular (CFL) ligaments during an inversion sprain.
520 $a The repeatability of the test system was confirmed with a parametric evaluation of a manikin lower leg and of different types of prosthetic feet. Peak vertical forces and accelerations showed variabilities of less than 5% and demonstrated treatment effects for changes in foot type, drop height, and specimen mass.
520 $a Human volunteer drops were performed to determine appropriate ankle angles, Achilles tendon (AT) forces, and AT stiffnesses to be used for the cadaver drops. Ten males performed drops from 30.5 cm using four landing techniques. At impact, the ankle angle was 123-135 $\ sp\circ $. Average AT forces were 2.33-2.88 times body weight and ranged from 145 to 208 N/mm. The AT parameters were used to construct a surrogate plantar flexor muscle in the cadavers, and the vertical forces and accelerations were compared to values obtained in cadaver drops.
520 $a Cadaver lower legs were then placed in the test system. Strain transducers were sutured into the ATFL and CFL and a surrogate plantar flexor was attached to the calcaneus. The specimens were dropped from 15.2 cm onto a flat surface and then onto a 30 $\ sp\circ $ wedge that caused an inversion. In vitro strains and strain rates were obtained during this simulated traumatic event. The strains and strain rates were significantly higher during wedge drops (0.110 and 13.5 s $\ sp{-1} $) than flat drops (0.016 and 4.8 s $\ sp{-1} $) . The ATFL tended to have higher strains and strain rates than the CFL, which may explain why it is more often injured than the CFL.
520 $a These data are useful in determining mechanisms of ankle injuries during inversion sprains and can be integrated into test models, computer simulations, and other experimental studies investigating ankle biomechanics. These experiments, for the first time in any joint, also provide in vitro strain and strain rate information during a simulated traumatic, potentially injurious event.
590 $a School code: 0240.
650 4 $a Engineering, Biomedical. $3 1017684
650 4 $a Health Sciences, Recreation. $3 1018003
650 4 $a Biology, Anatomy. $3 1021727
690 $a 0541
690 $a 0575
690 $a 0287
710 2 0 $a The University of Utah. $3 1017410
773 0 $t Dissertation Abstracts International $g 57-10B.
790 $a 0240
791 $a Ph.D.
792 $a 1996
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=9710168