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Related Experiment Videos

Distal biceps tendon anatomy: a cadaveric study.

M H A Eames1, G I Bain, Q A Fogg

  • 1Modbury Public Hospital, Smart Road, Modbury, SA 5092, Australia.

The Journal of Bone and Joint Surgery. American Volume
|May 3, 2007
PubMed
Summary

The distal biceps tendon often has two parts, originating from the long and short heads of the biceps muscle. This dual insertion impacts elbow flexion and forearm supination, crucial for surgical repair.

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Area of Science:

  • Anatomy
  • Orthopedic Surgery
  • Biomechanics

Background:

  • Detailed anatomical studies of the distal biceps tendon and its aponeurosis are lacking.
  • Understanding this anatomy is crucial for effective surgical interventions.

Purpose of the Study:

  • To investigate the detailed anatomy of the distal biceps tendon and the lacertus fibrosus.
  • To elucidate the insertion patterns and potential functional implications of the distal biceps tendon.

Main Methods:

  • Dissection of seventeen cadaver elbows.
  • Utilized loupe magnification for detailed identification of anatomical structures.

Main Results:

  • Ten of seventeen specimens exhibited a two-part distal biceps tendon, reflecting origins from the long and short heads.

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  • Seven specimens showed tendinous interdigitation, with distinct insertion points influencing elbow flexion and forearm supination.
  • The bicipital aponeurosis, comprising three layers, fully encircled ulnar forearm flexor muscles, suggesting a role in distal tendon stabilization.

    • Conclusions:

    • A double tendon insertion may enable independent function of biceps portions.
    • Accurate orientation of both tendon components is vital during distal biceps avulsion repair.