Axial Anatomy: Extrinsic Ligaments Part 2
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Wrist extrinsics in the short axis
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view, not everybody's favorite
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projection or subject for discussion.
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But we have to have our coronal or AP projection
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along the dorsal aspect of the coronal plane.
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And we see our sideways V that we talked
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about earlier for the dorsal extrinsics.
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And here is the distal limb of our V right there.
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And here are some proximal limbs of our V right here.
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And let me see if I can click out of
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my drawing tool and cross-reference
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the image to show you these structures.
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Here's one right here.
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Now you might think, well, these are extrinsics,
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they're not as important as the intrinsics.
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That is true.
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But this is a common area of injury when you fall
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on an outstretched hand, so-called FOOSH injury.
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And when you see a puffy, swollen area, just
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dorsal to the lunate, right here, you are seeing
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injury to the dorsal intercarpal ligament.
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Those patients complain of dorsal wrist pain.
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The fine movements of the lunate
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and scaphoid are affected.
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But as long as the intrinsic ligaments
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are spared, they'll heal on their own.
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Let's look at the more proximal aspect of the V.
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It's a little bit thicker and paired.
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This is the dorsal radiocarpal
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ligament, and here it is right here.
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Again, another site that will be puffy or swollen with
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a fall on an outstretched hand, so-called FOOSH injury.
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The patients complain of dorsal wrist pain for
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a period of a month up to about six months.
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But if the intrinsics and other key stabilizing
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structures are intact, you're going to be okay.
Stephen J Pomeranz, MD
Chief Medical Officer, ProScan Imaging. Founder, MRI Online
ProScan Imaging
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