Biomechanical analysis of the brachioradialis as a donor in tendon transfer

Jan Fridén, Dirk Albrecht, Richard L. Lieber*

*Corresponding author for this work

Research output: Contribution to journalArticle

51 Scopus citations

Abstract

Anatomic and biomechanical properties of the passive brachioradialis muscle were investigated to understand the limited excursion of this muscle seen during tendon transfer surgery. First, architectural measurements were performed on three fiber bundles obtained from four regions of the brachioradialis (10 specimens) chosen to represent the range of muscle fiber lengths across the brachioradialis. Next, in separate specimens (eight specimens), passive excursion was measured by securing the distal tendon stump to a servomotor. A constant load of 4.9 N was applied to the tendon, while the distal tendon was released from the surrounding tissue in 3-cm increments. Within the four regions studied, muscle fiber length varied significantly from 104.2 ± 6.2 mm to 179.8 ± 6.1 mm. As the brachioradialis was released, an average of 3 mm of mobility was obtained for each interval whereas for the succeeding three intervals, an average of 5.3 mm of mobility was obtained. This resulted in 22.2 ± 2.3 mm of mobility when each specimen was fully released. These data show that there is no intrinsic muscle fiber length limitation to excursion, but that excursion is limited by other intermuscular connections to adjacent connective tissue and other muscles.

Original languageEnglish (US)
Pages (from-to)152-161
Number of pages10
JournalClinical Orthopaedics and Related Research
Issue number383
StatePublished - Jan 1 2001

ASJC Scopus subject areas

  • Surgery
  • Orthopedics and Sports Medicine

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