Dr. Jill Bolte Taylor

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.

And it's actually the pressure of the cranial vault versus the pressure in the thorax of the chest and the pressure of the abdomen.

It's a system.

And they all work together.

in order to keep everything well regulated, homeostasis, a state where the cells are happy.

And so the third layer is like right here, and you can see this layer is peeled away, the arachnoid, and under here I'm now touching pia, and pia is the external layer of the brain cells themselves, the brain tissue.

So this is a beautiful brain, and it would be positioned in my head like this.

So front of the brain, back of the brain, coming down, hanging down as the spinal cord.

And then as you look at the spinal cord, this is called the cauda equina or cauda equina.

And these are the nerves that are actually going to go down into your lower extremity.

So all the information that's going to go down into your lower extremity to control your body is controlled.

And the sensory information is coming in through those nerve fibers.

It does.

Well, you know, we are quite a well-designed machine in its own way.

The difference is we are organic.

We are biological.