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Extrinsic Ligaments: Thumb Part 2

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So here's a sagittal MRI showing the attachment

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of the dorsoradial ligament right there.

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It comes off the dorsal radial tubercle

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of the trapezium and inserts on the base

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of the first metacarpal, this little bump.

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This would be dorsal, this would be palmar.

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This is a sagittal view, not a coronal view.

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So here's confirmation that you're

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looking at the sagittal projection.

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Let's go back to the thumb

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again and look at our strong,

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stabilizing dorsoradial ligament, an

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important stabilizer of the first CMC.

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Here it is in the coronal projection.

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You can see cross-references very nicely.

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And it lies just deep to the insertion

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of the abductor pollicis longus tendon.

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Pollicis longus, a little more radial,

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a little more superficial.

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Dorsiradial or dorsoradial ligament sitting just deep to it.

Report

Faculty

Stephen J Pomeranz, MD

Chief Medical Officer, ProScan Imaging. Founder, MRI Online

ProScan Imaging

Tags

Thumb & Finger

Musculoskeletal (MSK)

MRI

Idiopathic

Hand & Wrist

Congenital

Acquired/Developmental

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