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Midline Sagittal Commissures

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Let's take a look at the sagittal midline cut,

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the guts, the heart and soul of MRI of the brain

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where you might use this sequence to evaluate,

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and especially this projection,

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to look for anomalies of the brain in pediatric patients.

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I want to talk about the commissures.

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So, I'm going to start out with the inferior colliculus,

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the superior colliculus.

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And I run right into the posterior commissure,

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which is a pretty small structure.

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And right above it is the habenular commissure,

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sitting between it, the posterior commissure,

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and the pineal gland, which is not a commissure.

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Another commissure is the interthalamic adhesion,

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which you can scroll back and forth,

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the midline portion of the thalamus.

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A well-known commissure,

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anteriorly, is the anterior commissure.

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And then the largest commissure,

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the granddaddy of them all,

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is the corpus callosum.

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And look in the midline,

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we see a vertical slit-like area of hyperintensity.

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Right there.

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The lamina terminalis and

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the rostrum of the corpus callosum,

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followed by genu body and the splenium of the corpus

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callosum, which you're all familiar with.

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And as long as we're in the neighborhood,

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we've got the body and crus of the fornix

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and then the fornix itself.

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We'll move on now to some of the other structures

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in the midline, if you have time.

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Description

Faculty

Stephen J Pomeranz, MD

Chief Medical Officer, ProScan Imaging. Founder, MRI Online

ProScan Imaging

Tags

Neuroradiology

MRI

Brain

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