In vivo biomechanical evaluations of the medial gastrocnemius: Changes in muscle properties in stroke survivors

Fan Gao, Li Qun Zhang*

*Corresponding author for this work

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

6 Scopus citations

Abstract

Patients post stroke showed substantial changes in biomechanical properties of the ankle and knee joints. However, it is not clear what the underlying mechanisms are in the hypertonic calf muscles in stroke survivors. Biomechanical properties of the medial gastrocnemius muscle in both stroke survivors and healthy subjects were investigated in vivo and noninvasively. A programmable electrical stimulator was used to activate the medial gastrocnemius selectively and a GE LOGIQ-9 ultrasound machine was used to register the muscle images across the fiber lengths to examine its biomechanical properties in vivo. It was found that 1) stroke survivors showed shorter muscle fiber length; 2) stroke survivors' muscles had smaller pennation angles both anteriorly and posteriorly; 3) stroke survivors demonstrated an active torque-angle curve shifted towards dorsi-flexion, compared with healthy control subjects.

Original languageEnglish (US)
Title of host publication28th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBS'06
Pages2083-2086
Number of pages4
DOIs
StatePublished - Dec 1 2006
Event28th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBS'06 - New York, NY, United States
Duration: Aug 30 2006Sep 3 2006

Publication series

NameAnnual International Conference of the IEEE Engineering in Medicine and Biology - Proceedings
ISSN (Print)0589-1019

Other

Other28th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBS'06
CountryUnited States
CityNew York, NY
Period8/30/069/3/06

ASJC Scopus subject areas

  • Signal Processing
  • Biomedical Engineering
  • Computer Vision and Pattern Recognition
  • Health Informatics

Fingerprint Dive into the research topics of 'In vivo biomechanical evaluations of the medial gastrocnemius: Changes in muscle properties in stroke survivors'. Together they form a unique fingerprint.

Cite this