Lunotriquetral ligament
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The lunotriquetral ligament joins the lunate and triquetrum of the carpals.
Gross anatomy
It arises from the volar aspect of the distal lunate and triangular fibrocartilage to distally attach to the medial margin of the hamate. With the ulnolunate ligament if is part of the triangular fibrocartilage complex.
SimiliarSimilar to the scapholunate ligament, it has 3 portions – volar, proximal and dorsal bands.
Dorsal component
- most important component contributing to carpal stability
- less flexible than the scapholunate ligament
- limits the amount of dorsiflexion between the lunate and triquetrum
Volar component
- very small, typically
1mm1 mm - linear in shape
- runs parallel to the space between the lunate and triquetrum
- some fibres are joined by the volar ulnolunate ligament
Proximal component
- triangular in shape with the apex directed distally
- some fibres are joined by the superficial fibres of the volar radiolunate ligament
Related pathology
Complete tears of the dorsal band of the lunotriquetral ligament leads to volar intercalated segmental instability (VISI).
-<p>The <strong>lunotriquetral ligament</strong> joins the <a title="Lunate" href="/articles/lunate-1">lunate</a> and <a title="Triquetrum" href="/articles/triquetrum">triquetrum</a> of the <a title="carpals" href="/articles/carpal-bones">carpals</a>.</p><h4>Gross anatomy</h4><p>It arises from the volar aspect of the distal lunate and triangular fibrocartilage to distally attach to the medial margin of the hamate. With the <a title="ulnolunate ligament" href="/articles/ulnolunate-ligament">ulnolunate ligament</a> if is part of the <a title="Triangular fibrocartilage complex" href="/articles/triangular-fibrocartilage-complex">triangular fibrocartilage complex</a>. </p><p>Similiar to the <a title="Scapholunate ligament complex" href="/articles/scapholunate-ligament-complex">scapholunate ligament</a>, it has 3 portions – volar, proximal and dorsal bands.</p><h5>Dorsal component</h5><ul>- +<p>The <strong>lunotriquetral ligament</strong> joins the <a href="/articles/lunate-1">lunate</a> and <a href="/articles/triquetrum">triquetrum</a> of the <a href="/articles/carpal-bones">carpals</a>.</p><h4>Gross anatomy</h4><p>It arises from the volar aspect of the distal lunate and triangular fibrocartilage to distally attach to the medial margin of the hamate. With the <a href="/articles/ulnolunate-ligament">ulnolunate ligament</a> if is part of the <a href="/articles/triangular-fibrocartilage-complex">triangular fibrocartilage complex</a>. </p><p>Similar to the <a href="/articles/scapholunate-ligament-complex">scapholunate ligament</a>, it has 3 portions – volar, proximal and dorsal bands.</p><h5>Dorsal component</h5><ul>
-<li>very small, typically 1mm</li>- +<li>very small, typically 1 mm</li>
-<li>triangular in shape with apex directed distally</li>-<li>some fibres are joined by the superficial fibres of the volar <a title="radiolunate ligament " href="/articles/radiolunate-ligament">radiolunate ligament </a>- +<li>triangular in shape with the apex directed distally</li>
- +<li>some fibres are joined by the superficial fibres of the volar <a href="/articles/radiolunate-ligament">radiolunate ligament </a>
-</ul><h4>Related pathology</h4><p>Complete tears of the dorsal band of the lunotriquetral ligament leads to <a title="Volar intercalated segmental instability" href="/articles/volar-intercalated-segmental-instability">volar intercalated segmental instability</a> (VISI).</p>- +</ul><h4>Related pathology</h4><p>Complete tears of the dorsal band of the lunotriquetral ligament leads to <a href="/articles/volar-intercalated-segmental-instability">volar intercalated segmental instability</a> (VISI).</p>
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