High resolution ultrasound imaging of skeletal muscle dynamics and effects of fatigue

R. S. Witte, D. E. Dow, R. Olafsson, Y. Shi, M. O'Donnell

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

13 Scopus citations


A real-time high-frequency ultrasound acquisition system was used to describe coordination of individual muscle fibers during an isometric contraction. Effects of contraction size and muscle fatigue on axial strain and strain rate were examined in isolated leg muscles from a rat and mouse. Strain was estimated with a phase-sensitive speckle-tracking algorithm, capable of detecting displacements less than 100 nm. The spatial distribution of axial strain was not uniform and ranged from 0.5% - 5% during twitch stimulation. Also, strain and strain rate paralleled contraction size and degree of muscle fatigue. This potentially noninvasive technique may be appropriate to assess severity of movement disorders, such as cerebral palsy, and track coordination during therapy and rehabilitation after muscle injury.

Original languageEnglish (US)
Title of host publicationProceedings - 2004 IEEE Ultrasonics Symposium
Subtitle of host publicationA Conference of the IEEE International Ultrasonics, Ferroelectrics, and Frequency Control Society, UFFC-S
EditorsM.P. Yuhas
Number of pages4
StatePublished - 2004
Event2004 IEEE Ultrasonics Symposium - Montreal, Que., Canada
Duration: Aug 23 2004Aug 27 2004

Publication series

NameProceedings - IEEE Ultrasonics Symposium
ISSN (Print)1051-0117


Other2004 IEEE Ultrasonics Symposium
CityMontreal, Que.

ASJC Scopus subject areas

  • Acoustics and Ultrasonics


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