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Coronal Anatomy: Extrinsic Ligaments Part 5

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0:00

We're on wrist extrinsics.

0:02

We're talking about the volar aspect of the wrist.

0:05

Extrinsics are tough.

0:07

We've already covered, from the radial styloid,

0:09

the radioscaphocapitate ligament stabilizer,

0:12

but I've drawn it in here because it parallels

0:16

and sits a little bit distal to our next ligament.

0:19

Which is the radiolunate ligament,

0:22

which is a little bit misnamed.

0:24

It comes off a little more medial.

0:26

It parallels this radioscaphocapitate

0:29

ligament right here.

0:30

And then takes a left-hand turn towards

0:33

the west coast, goes across the lunate,

0:36

and inserts on the base of the triquetrum.

0:39

So, it's a little bit misnamed, and for this

0:42

reason, it's got several different names.

0:44

The radiolunate ligament, the long

0:47

radiolunate ligament, and perhaps the best

0:49

name, the radiolunatotriquetral ligament.

0:54

This ligament is sometimes deficient or anomalous

0:58

in patients with Madelung's deformity,

1:00

but they have congenital shortening of the ulna.

1:03

It's easily recognized because it's parallel and

1:06

a little proximal to the radioscaphocapitate

1:09

or sling ligament.

1:11

Let's have a look on MRI.

Report

Faculty

Stephen J Pomeranz, MD

Chief Medical Officer, ProScan Imaging. Founder, MRI Online

ProScan Imaging

Tags

Non-infectious Inflammatory

Musculoskeletal (MSK)

MRI

Hand & Wrist

Congenital

Acquired/Developmental

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