Lateral Collateral Ligamentous Anatomy: Coronal Projection
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Let's look at the high and low
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ankle with the toe pointed at
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1.5T in the coronal projection.
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We start out more in the back.
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There's the posterior tib fib ligament.
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Some of the syndesmosis above it, which is
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variably perforated for vessels and nerves.
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Now let's work our way forward
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to the anterior tib fib ligament.
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That is more ill defined, because
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the foot is in plantar flexion.
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So it shows up as some wispy, gray
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structures between the tibia and the fibula.
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Let's do something a little bit more easy.
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Let's go back to the back of the ankle,
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and show you the two major bundles of the
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posterior talofibular ligament, inserting
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on the fibula with a fairly
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broad footprint.
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That structure almost never tears.
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It's very powerful and really only
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ruptures in ankle dislocations.
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We're not going to show you the crural ligaments,
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which are not well seen with the foot implant
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or flexion, but we are going to show you this
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ligament, the calcaneal fibular ligament, which is
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optimally seen with the foot implant or flexion.
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So let's move forward a little bit.
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Let's move to the front.
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Not all the way to the front.
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Look where we are on the fibula.
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This ligament that we're going
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to show you goes from proximal,
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superolateral, to posterior inferomedial.
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So in other words, it's going to go
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from the fibula and go backwards.
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Let's go backwards, sorry.
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Backwards.
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There it is.
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Now it's triangular.
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Let's keep going backwards.
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Now, it almost looks like a tendon.
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It's lining up with the peroneus brevis,
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but it is not the peroneus brevis.
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It is the spreading out of the insertion
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of the calcaneal fibular ligament.
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There it is, there it is,
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there it is, there it is, there it is,
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inserting on the back of the calcaneus.
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That is the lateral collateral ligament anatomy
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in the coronal projection with the toe pointed.
Stephen J Pomeranz, MD
Chief Medical Officer, ProScan Imaging. Founder, MRI Online
ProScan Imaging
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