Sheep Ventricles, pt.1

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From the course by The University of Chicago

Understanding the Brain: The Neurobiology of Everyday Life

624 ratings

The University of Chicago

Understanding the Brain: The Neurobiology of Everyday Life

624 ratings

Learn how the nervous system produces behavior, how we use our brain every day, and how neuroscience can explain the common problems afflicting people today. We will study functional human neuroanatomy and neuronal communication, and then use this information to understand how we perceive the outside world, move our bodies voluntarily, stay alive, and play well with others.

From the lesson

Perception and Vision

Perception is how the brain interprets incoming stimuli. Not all stimuli that can be sensed are perceivable, and sometimes those that can be perceived play tricks on us. The systematic ways that stimuli are interpreted (or misinterpreted) show how well the brain can understand our surroundings, sometimes with limited information. This module we will explore perception and vision.This module contains a lot of material, so be sure to start early so that you have time to finish!

Sheep Brain vs Human Brain4:51

Sheep Cerebellum2:53

Sheep Brain Parts5:56

Sheep Brainstem5:14

Sheep Ventricles, pt.13:47

Sheep Ventricles, pt.211:57

Sheep Spinal Cord & Cauda Equina8:45

Meet the Instructors

Peggy Mason
Professor
Neurobiology

[MUSIC].

Ok, so now what we're going to do is we're going to look at the ventricular system.

Now we really didn't emphasize this in the, in the course, but inside of the

brain, there is a, there are these spaces that contain cerebrospinal fluid or CSF.

And they are within the telencephalon.

There's a piece of ventricle in every section.

So, within the telencephalon is called these lateral ventricles.

That's this c-shape.

And then in the diencephalon, it's the third ventricle in the mid brain.

It's the cerebral aqueduct.

In the hind brain, it's the fourth ventricle.

And from the fourth ventricle, CSF leaks out, this is, this is really cool.

It's really cool.

Okay.

So here's the, here's the the brain and front,

there's a leaking point right here called the Foramen of

Magendie, and then there's these two leaking points over here

on either side, the foram, the two foramen of Luschkas.

Well, no, one frame in a Luschka, two foramen of Luschka.

The fluid, the CSF flows back from the lateral of ventricles of the fore

brain, of the telencephalon back through this third ventricle.

Which is in a diencephalon through

the cerebral aqueduct through the fourth ventricle,

and when it gets to the fourth ventricle, it comes out through three holes.

This is one of them, foramen of Magendie and then on

either side, one and two, there is the foramen of Luschka.

So there are three holes.

Foramen of Luschka on the left, Foramen of Luschka on the right and Magendie.

And, these three holes, CSF comes out and then it

covers the convexity of the, the outside of the brain.

So, the CSF is then between the brain and the dural.

It's in the subarachnoid space.

That's where the CSF is.

It's the fluid with in the dural sac.

And it surrounds both the brain and actually the central the spinal cord.

So it surrounds the entire central nervous system, brain and spinal cord.

So that's where the CSF is going to come from.

it's, it's the same deal on the human.

Although, unfortunately, this specimen doesn't have a great medulla, but

it's coming out from this middle section and then also out from on either side.

>> What happens to the CSF after?

>> So at, so the [LAUGH].

So what happens to the CSF?

There has to be a drain.

If we didn't have a drain, we would have a problem.

And what happens, actually, is that it gets taken up by the arachnoid.

The arachnoid takes it up and puts it into these things called dural sinuses.

So there are things called arachnoid granulations that are going to

scoop up CSF, used CSF, put it into the sinuses.

The sinuses drain into the veins of the body

and back to the heart, through the vein vena cava.

Okay.

So, in the next section, we're going to look at all the ventricles.

[MUSIC]

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