Diagramatic Anatomy: Extrinsic Ligaments Part 7
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We're on wrist anatomy.
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Extrinsics.
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Yeah, they're hard.
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We're looking at a short axis view with
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the red arrow pointing to the volar radioulnar
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ligament and the yellow arrow pointing
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to the dorsal radioulnar ligament.
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We know we're dorsal with the palm facing
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up because here's Lister's tubercle
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as a potential landmark.
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Now we've said in the past that coming off, not the
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ulna itself, but actually coming off this ligament.
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So it's a ligamentous, the ligamentous origin is the
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volar ulnocarpal ligaments, and the volar ulnolunate
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ligaments, and the volar ulnotriquetral ligaments.
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So injuries of this volar radioulnar
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ligament can be a very destabilizing thing
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because there are multiple volar ligaments
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that come off it.
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And these are actually coming at you, going from
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proximal to distal, attaching to respective areas,
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namely to the scapholunate ligament, to the lunate,
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and to the triquetrum, is where they are headed.
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Now the volar radioulnar ligament is
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involved in stabilization of the radius
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and ulna, specifically in supination.
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And it is particularly compromised when
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there is both a radioulnar volar ligament
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transection and an interosseous membrane injury.
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Let's have a look on MRI.
Stephen J Pomeranz, MD
Chief Medical Officer, ProScan Imaging. Founder, MRI Online
ProScan Imaging
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