Factors affecting knee flexion during the swing phase of gait

Stephen Jacob Piazza, Scott L. Delp

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

A three-degree-of-freedom sagittal plane musculoskeletal model of the human lower extremity has been developed to simulate the swing phase of normal gait. Values for the joint angles and angular velocities at toe-off and the excitation input to the model's muscles were derived from experimental measurements. The normal swing phase simulation produced joint angles, joint moments, and heel and toe trajectories that corresponded to experimental results. Simulations were run with altered initial joint angular velocities and applied joint moments to determine the effects of each upon peak knee flexion and knee angular acceleration. It was found that knee flexion during the swing phase is caused primarily by a large initial knee flexion velocity at toe-off which is tempered by a knee extension acceleration that is chiefly caused by muscular action.

Original languageEnglish (US)
Title of host publicationAdvances in Bioengineering
PublisherASME
Pages113-114
Number of pages2
Volume28
StatePublished - 1994
EventProceedings of the 1994 International Mechanical Engineering Congress and Exposition - Chicago, IL, USA
Duration: Nov 6 1994Nov 11 1994

Other

OtherProceedings of the 1994 International Mechanical Engineering Congress and Exposition
CityChicago, IL, USA
Period11/6/9411/11/94

Fingerprint

Angular velocity
Muscle
Trajectories

All Science Journal Classification (ASJC) codes

  • Engineering(all)

Cite this

Piazza, S. J., & Delp, S. L. (1994). Factors affecting knee flexion during the swing phase of gait. In Advances in Bioengineering (Vol. 28, pp. 113-114). ASME.
Piazza, Stephen Jacob ; Delp, Scott L. / Factors affecting knee flexion during the swing phase of gait. Advances in Bioengineering. Vol. 28 ASME, 1994. pp. 113-114
@inproceedings{6a6bd1008c81459dab853d2ae52f6ddc,
title = "Factors affecting knee flexion during the swing phase of gait",
abstract = "A three-degree-of-freedom sagittal plane musculoskeletal model of the human lower extremity has been developed to simulate the swing phase of normal gait. Values for the joint angles and angular velocities at toe-off and the excitation input to the model's muscles were derived from experimental measurements. The normal swing phase simulation produced joint angles, joint moments, and heel and toe trajectories that corresponded to experimental results. Simulations were run with altered initial joint angular velocities and applied joint moments to determine the effects of each upon peak knee flexion and knee angular acceleration. It was found that knee flexion during the swing phase is caused primarily by a large initial knee flexion velocity at toe-off which is tempered by a knee extension acceleration that is chiefly caused by muscular action.",
author = "Piazza, {Stephen Jacob} and Delp, {Scott L.}",
year = "1994",
language = "English (US)",
volume = "28",
pages = "113--114",
booktitle = "Advances in Bioengineering",
publisher = "ASME",

}

Piazza, SJ & Delp, SL 1994, Factors affecting knee flexion during the swing phase of gait. in Advances in Bioengineering. vol. 28, ASME, pp. 113-114, Proceedings of the 1994 International Mechanical Engineering Congress and Exposition, Chicago, IL, USA, 11/6/94.

Factors affecting knee flexion during the swing phase of gait. / Piazza, Stephen Jacob; Delp, Scott L.

Advances in Bioengineering. Vol. 28 ASME, 1994. p. 113-114.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

TY - GEN

T1 - Factors affecting knee flexion during the swing phase of gait

AU - Piazza, Stephen Jacob

AU - Delp, Scott L.

PY - 1994

Y1 - 1994

N2 - A three-degree-of-freedom sagittal plane musculoskeletal model of the human lower extremity has been developed to simulate the swing phase of normal gait. Values for the joint angles and angular velocities at toe-off and the excitation input to the model's muscles were derived from experimental measurements. The normal swing phase simulation produced joint angles, joint moments, and heel and toe trajectories that corresponded to experimental results. Simulations were run with altered initial joint angular velocities and applied joint moments to determine the effects of each upon peak knee flexion and knee angular acceleration. It was found that knee flexion during the swing phase is caused primarily by a large initial knee flexion velocity at toe-off which is tempered by a knee extension acceleration that is chiefly caused by muscular action.

AB - A three-degree-of-freedom sagittal plane musculoskeletal model of the human lower extremity has been developed to simulate the swing phase of normal gait. Values for the joint angles and angular velocities at toe-off and the excitation input to the model's muscles were derived from experimental measurements. The normal swing phase simulation produced joint angles, joint moments, and heel and toe trajectories that corresponded to experimental results. Simulations were run with altered initial joint angular velocities and applied joint moments to determine the effects of each upon peak knee flexion and knee angular acceleration. It was found that knee flexion during the swing phase is caused primarily by a large initial knee flexion velocity at toe-off which is tempered by a knee extension acceleration that is chiefly caused by muscular action.

UR - http://www.scopus.com/inward/record.url?scp=0028756409&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0028756409&partnerID=8YFLogxK

M3 - Conference contribution

AN - SCOPUS:0028756409

VL - 28

SP - 113

EP - 114

BT - Advances in Bioengineering

PB - ASME

ER -

Piazza SJ, Delp SL. Factors affecting knee flexion during the swing phase of gait. In Advances in Bioengineering. Vol. 28. ASME. 1994. p. 113-114