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Lunotriquetral Ligament

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Description

Illustration of the lunotriquetral ligament[1]
The lunotriquetral (LT) ligament is tripartite with a dorsal and fibrous section and a central membranous component. The volar and dorsal fibrous components merge with the extrinsic ligaments that are major contributors to LT overall stability. Ulnar extrinsic ligaments merging with fibrous component of LTIL. DRC, dorsal radiocarpal ligament; DIC, dorsal intercarpal ligament; UL, ulnolunate ligament; UT, ulnotriquetral ligament; LTIL, lunotriquetral interosseous ligament.[2]

Name

  • Lunotriquetral Ligament (LTL)

General

Gross Anatomy

  • Arises from the volar aspect of the distal lunate and TFCC
  • Distally attaches to the median margin of the triquetrum

Dorsal component

  • Less flexible than the scapholunate ligament
  • Limits the amount of dorsiflexion between the lunate and triquetrum

Volar Component

  • Important component contributing to carpal stability
  • Limits triquetral extension
  • Thickest portion[5]
  • Linear in shape
  • Runs parallel to the space between the lunate and triquetrum
  • Some fibers are joined by the volar ulnolunate ligament

Proximal Component

  • Triangular in shape with the apex directed distally
  • Some fibers are joined by the superficial fibers of the volar radiolunate ligament

Function

  • Dorsal portion: limits dorsiflexion between the lunate and triquetrum[6]
  • Volar portion: largely contributes to carpal stability and also limits triquetral extension

Clinical Significance

See Also

References

  1. ↑ Pillemer, Roger, and Roger Pillemer. "Examination for Specific Conditions of the Wrist." Handbook of Upper Extremity Examination: A Practical Guide (2022): 109-122.
  2. ↑ Image courtesy of musculoskeletalkey.com
  3. ↑ Beeker RW, Rehman UH (2022). Carpal Ligament Instability.
  4. ↑ Moser T, Khoury V, Harris PG, Bureau NJ, Cardinal E, Dosch JC. MDCT arthrography or MR arthrography for imaging the wrist joint?. InSeminars in musculoskeletal radiology 2009 Mar (Vol. 13, No. 01, pp. 039-054). © Thieme Medical Publishers.
  5. ↑ Ritt M, Bishop A, Berger R, Linscheid R, Berglund L, An K. Lunotriquetral Ligament Properties: A Comparison of Three Anatomic Subregions. J Hand Surg Am. 1998;23(3):425-31.
  6. ↑ Henry Knipe, 2022, Lunotriquetral ligament, Radiopedia, viewed 20/12/22,
Created by:
John Kiel on 21 December 2024 14:21:20
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Last edited:
18 February 2026 18:17:34
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