Validity of fascicle length estimation in the vastus lateralis and vastus intermedius using ultrasonography

Ryosuke Ando, Keigo Taniguchi, Akira Saito, Mineko Fujimiya, Masaki Katayose, Hiroshi Akima

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25 Citations (Scopus)

Abstract

The purpose of this study was to determine the validity of fascicle length estimation in the vastus lateralis (VL) and vastus intermedius (VI) using ultrasonography. The fascicle lengths of the VL and VI muscles were measured directly (dFL) using calipers, and were estimated (estmFL) using ultrasonography, in 10 legs from five Thiel's embalmed cadavers. To determine the validity of the estmFLs, FL was estimated using five previously published models and compared with dFL. The intraclass correlation coefficients (ICCs) of two of the five models were. >0.75, indicating that these estimates were valid. Both of these models combined measurement of the length of the visible part of the fascicle with linear extrapolation of the length of the part of the fascicle that was not visible on the sonographic image. The ICCs and absolute% difference were best in models that used appropriate pennation angles. These results suggest that two of the five previously published models are valid for obtaining estmFL of the VL and VI using ultrasonography.

Original languageEnglish
Pages (from-to)214-220
Number of pages7
JournalJournal of Electromyography and Kinesiology
Volume24
Issue number2
DOIs
Publication statusPublished - 2014
Externally publishedYes

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Keywords

  • Cadaver
  • Fascicle length
  • Skeletal muscle
  • Ultrasonography
  • Vastus intermedius

ASJC Scopus subject areas

  • Neuroscience (miscellaneous)
  • Biophysics
  • Clinical Neurology

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