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[Anatomy of the flexor and extensor tendons].

A Wilhelm1

  • 1Chirurgische Klinik, Klinikum Aschaffenburg.

Langenbecks Archiv Fur Chirurgie. Supplement. Kongressband. Deutsche Gesellschaft Fur Chirurgie. Kongress
|January 1, 1992
PubMed
Summary

Hand tendons feature unique gliding mechanisms and blood supply systems. Their coordinated function, influenced by reflexes and ligaments, can lead to the quadriga phenomenon in finger joints.

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Area of Science:

  • Anatomy
  • Biomechanics
  • Hand Surgery

Background:

  • The hand's flexor and extensor tendons possess specialized gliding mechanisms essential for function.
  • Tendon blood supply relies on paratenon and mesotenon within fibro-osseous tunnels.
  • Tendon excursion amplitude diminishes in distal parts of the hand.

Purpose of the Study:

  • To elucidate the intricate functional anatomy and biomechanics of hand tendons.
  • To explain the coordination mechanisms involving reflexes and lumbrical muscles.
  • To describe the role of extrinsic and intrinsic systems and retinacular ligaments in finger joint function.

Main Methods:

  • Anatomical dissection and functional analysis of hand tendons.
  • Review of biomechanical principles governing tendon excursion and joint linkage.
  • Examination of the influence of fibrous structures on digital joint mechanics.

Main Results:

  • Tendon function is coordinated by reflexes and lumbricals, with IP joints linked by Landsmeer's ligaments.
  • Oblique fibrous structures at the MP joint level can cause tenodesis, leading to the quadriga phenomenon.
  • Maximal flexion and extension can impair neighboring MP joints due to this tenodesis effect.

Conclusions:

  • Understanding these complex tendon interactions is crucial for diagnosing and treating hand conditions.
  • The quadriga phenomenon highlights the interconnectedness of digital joints and tendon mechanics.
  • Further research into tendon gliding and joint linkage can improve surgical outcomes and rehabilitation.

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