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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

0:07

projection or subject for discussion.

0:10

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.

0:59

And when you see a puffy, swollen area, just

1:03

dorsal to the lunate, right here, you are seeing

1:08

injury to the dorsal intercarpal ligament.

1:13

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

1:56

structures are intact, you're going to be okay.

Report

Faculty

Stephen J Pomeranz, MD

Chief Medical Officer, ProScan Imaging. Founder, MRI Online

ProScan Imaging

Tags

Musculoskeletal (MSK)

MRI

Idiopathic

Hand & Wrist

Congenital

Acquired/Developmental

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