0:01

Sagittal midline anatomy, focusing on the brainstem.

0:05

The medulla separated from the pons

0:08

by the pontomedullary sulcus.

0:10

Another little dippity do, or sulcus,

0:12

can be seen at this protrusion here,

0:14

which is a landmark known as the medullary clava,

0:18

where the proprioceptive nuclei will synapse.

0:22

Anteriorly, in the medulla,

0:24

will be the location of the pyramids

0:26

and the motor tracks.

0:27

As we ascend, we reach the level of the pons

0:30

with the pontine belly.

0:33

The floor of the fourth ventricle.

0:35

Here's the fourth ventricle with the fastigium of the

0:37

fourth, there's the inferior recess of the fourth,

0:40

there's the superior recess and the aqueduct of Sylvius.

0:44

And the facial colliculus bump sits on the floor

0:47

of the fourth ventricle, not easily seen here.

0:49

As we move up to the level of the midbrain,

0:53

separated by the ponto midbrain sulcus,

0:56

we see the inferior colliculus,

0:57

the superior colliculus,

0:59

the posterior commissure and the aqueduct of Sylvius.

1:02

Anteriorly, we've got the mammillary body,

1:05

the interpeduncular cistern,

1:06

through which the third nerve will be seen

1:09

exiting on higher resolution imaging.

1:11

And we'll show it to you separately in the cranial

1:12

nerve section. If you look very carefully,

1:15

you can see a little white structure ascending

1:17

from the region of the mammillary body.

1:19

And this is known as the Mammillothalamic tract.

1:22

That concludes a brief discussion of the brainstem,

1:26

including a little bit of the ventricular anatomy.

1:28

There's the third ventricle sitting immediately above it.

1:31

Let's move on.

1:32

Pomeranz out.

Basic Brainstem Anatomy

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