Sagittal Anatomy Part3
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Sagittal wrist MRI, the dreaded
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ligaments in the dreaded projection.
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Not a good combination, but let's
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have at it with some simplicity.
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We're not going to take every ligament; we've
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explored them in other vignettes, but let's
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start out with the radioscaphocapitate ligament,
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which comes off the radial styloid and has a V
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shaped or inverted V-shaped configuration on the
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radial side of the wrist coronally, and here it
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is cross-referenced in front of the scaphoid.
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as a thick, dark band allowing
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the scaphoid to stand up.
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In other words, when we lose this ligament, along with
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the scapholunate stabilizers, the scaphoid will sag
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downward or will rotate in a counterclockwise fashion.
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Another highlighted ligament in this projection,
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which you've heard about before, is the
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dorsal, or dorsal, radial ligament of the thumb.
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It's a little bit counterintuitive
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to think of the strongest
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and most important stabilizing ligament of the thumb
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being seen in the sagittal projection, but it is.
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There it is from the greater multangular or
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trapezium to the base of the first metacarpal.
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You must confirm the integrity of this ligament.
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Then we get into the triangular
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fibrocartilage attachments.
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That's where it gets really dicey.
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The triangular fibrocartilage is anchored
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by its posterior condensation to known
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as the dorsal radial ulnar ligament.
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And the anterior condensation right here, known
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as the palmar or volar radial ulnar ligament.
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And from these ligaments come some other ligaments
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known as the ulnar collateral ligaments.
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This is a good stopping point, and we'll
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return in a separate vignette to dissect
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those as part of our sagittal atomic analysis.
Stephen J Pomeranz, MD
Chief Medical Officer, ProScan Imaging. Founder, MRI Online
ProScan Imaging
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