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I'd like to share with you a little bit of the anatomy and

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the surrounding neuroanatomy of the Sylvian fissure

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and the superior temporal sulcus.

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So, let's start out in the midline.

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Basic. Basic.

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We've got our cerebellum.

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We've got our cuneus, right here.

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Our precuneus, right there,

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and then our paracentral lobule.

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In the region of the paracentral lobule

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is the central sulcus of Rolando,

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which can be easily landmarked and found

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by identifying this marginal sulcus,

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which is the continuation of the cingulate sulcus.

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Now, as we scroll off to the side,

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we suddenl,y and without warning,

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lose our central sulcus of Rolando.

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We're going to get it back in a second,

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and it has come back right here.

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So, here's the central sulcus of Rolando.

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In front of it is a precentral gyrus, which is bigger.

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The postcentral gyrus is smaller.

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And let's go to our Sylvian fissure for a minute.

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Our Sylvian fissure shaped like a caterpillar.

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Here's the anterior horizontal ramus,

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anterior ascending ramus,

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posterior ascending ramus,

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and maybe a small posterior descending ramus.

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Over the top of it is the supramarginal gyrus.

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Over top of that is the intraparietal sulcus,

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kind of shaped a little bit like a bird, if you will,

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or a horseshoe.

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Kind of looks like this.

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There's another portion of we don't see as well that

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comes around this way to cap this structure.

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And that structure is the superior temporal sulcus.

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The superior temporal sulcus separates the superior

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temporal gyrus from the middle temporal gyrus.

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Now capping, or horseshoe-like,

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on top of the superior temporal

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sulcus is the angular gyrus.

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The angular gyrus and the supramarginal gyrus

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together form the inferior parietal lobule.

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Above this sulcus will be the superior parietal lobule.

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Superior parietal lobule,

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inferior parietal lobule,

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separated by the intraparietal sulcus.

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Supramarginal gyrus,

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angular gyrus forming the inferior parietal lobule,

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and the components described for the Sylvian fissure

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separating the frontal lobe from the temporal lobe.

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Let's move on.