Sarcomere length in wrist extensor muscles. Changes may provide insights into the etiology of chronic lateral epicondylitis.

@article{Lieber1997SarcomereLI,
  title={Sarcomere length in wrist extensor muscles. Changes may provide insights into the etiology of chronic lateral epicondylitis.},
  author={Richard L Lieber and B O Ljung and Jan Frid{\'e}n},
  journal={Acta orthopaedica Scandinavica},
  year={1997},
  volume={68 3},
  pages={249-54}
}
Since the etiology of tennis elbow (lateral epicondylitis) is poorly understood, we studied the anatomical changes in the extensor carpl radialis brevis (ECRB) muscle during elbow joint rotation. Specifically, we measured ECRB sarcomere length, using an intraoperative laser diffraction procedure that measures muscle sarcomere length with an accuracy of +/- 0.05 micron. We found an unexpected biphasic response in ECRB sarcomere length as the elbow was rotated from full extension to full flexion… CONTINUE READING

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