Dr. Jill Bolte Taylor

It's layers that support between the bone and the brain tissue.

And it protects it.

So this is called, there are three layers called the meninges.

So when you've heard of meningitis.

So this is the dura mater.

It's very tough.

And you'll feel that.

It's like a really tough lettuce.

And this is essentially strapping the brain into the cranial vault and holding it into position.

Because you don't want this thing flopping around and having wounding and injury.

Well, it straps it in certain spots.

Yes.

And generally often when you do a dissection, you actually have to put a screwdriver in there to peel the dura off the bone.

So it straps it into position, kind of like a bra for the brain.

Okay, so this is the dura.

And then what I'm touching now is called the arachnoid.

And that's the second layer of the meninges.

And what you're looking at in there is blood inside of the blood vessels.

So one of the things about why the brain is so fragile is the blood vessels are transparently thin.

So the pressurized system of what's going on inside of the cranial vault has to be highly regulated.