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Coronal Anatomy: Extrinsic Ligaments Part 6

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0:01

The MR shows a fat-weighted image on your left,

0:03

a T1 image, and a water-weighted image on your right.

0:06

Perhaps the easiest structure to identify is

0:09

this one, the radioscaphocapitate ligament, which

0:12

comes off the radial styloid more peripherally.

0:15

But parallel to it, proximal to it, and arching or

0:19

moving in the same direction from proximal radial

0:23

to distal ulnar is the radiolunate ligament,

0:26

which is also called the long radiolunate

0:29

ligament or radiolunatotriquetral ligament, which

0:33

means there should be a triquetral attachment.

0:36

And there is.

0:37

You can see a few of these

0:38

wispy fibers on the T1-weighted image.

0:41

If I lighten it up a little bit, here are some of

0:44

the fibers inserting on the base of the triquetrum.

0:47

A little-known but important fact is that this

0:50

ligament contributes a few fibers to the lunatotriquetral

0:53

ligament, improving stabilization

0:56

between the lunate and the triquetrum.

0:59

Let's move on, shall we?

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Faculty

Stephen J Pomeranz, MD

Chief Medical Officer, ProScan Imaging. Founder, MRI Online

ProScan Imaging

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Non-infectious Inflammatory

Musculoskeletal (MSK)

MRI

Idiopathic

Hand & Wrist

Congenital

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