Interactive Transcript
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Sagittal midline anatomy, focusing on the brainstem.
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The medulla separated from the pons
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by the pontomedullary sulcus.
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Another little dippity do, or sulcus,
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can be seen at this protrusion here,
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which is a landmark known as the medullary clava,
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where the proprioceptive nuclei will synapse.
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Anteriorly, in the medulla,
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will be the location of the pyramids
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and the motor tracks.
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As we ascend, we reach the level of the pons
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with the pontine belly.
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The floor of the fourth ventricle.
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Here's the fourth ventricle with the fastigium of the
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fourth, there's the inferior recess of the fourth,
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there's the superior recess and the aqueduct of Sylvius.
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And the facial colliculus bump sits on the floor
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of the fourth ventricle, not easily seen here.
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As we move up to the level of the midbrain,
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separated by the ponto midbrain sulcus,
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we see the inferior colliculus,
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the superior colliculus,
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the posterior commissure and the aqueduct of Sylvius.
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Anteriorly, we've got the mammillary body,
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the interpeduncular cistern,
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through which the third nerve will be seen
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exiting on higher resolution imaging.
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And we'll show it to you separately in the cranial
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nerve section. If you look very carefully,
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you can see a little white structure ascending
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from the region of the mammillary body.
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And this is known as the Mammillothalamic tract.
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That concludes a brief discussion of the brainstem,
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including a little bit of the ventricular anatomy.
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There's the third ventricle sitting immediately above it.
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Let's move on.
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Pomeranz out.
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