Today the ozone layer is thinning.

or cortical visual impairment.

Cortical Surface Reconstruction and Visualization

loss of cortical gray matter.

Cortical fluctuation. It could trigger a seizure.

It's all about cortical processing and forebrain specialization.

You can think about normal development as a loss of cortical mass,

Or maybe this is scarring from a cortical infection that we didn't...

Now this cortical folding presents a significant challenge for interpreting surface electrical impulses.

Now actually we've looked in several different cortical areas in the monkey learning this task.

There are 15 or 20 cortical areas that are changed specifically when you learn a simple skill like this.

So for example we can look to the cortical area that represents input that's controlling the posture of the monkey.

We look in cortical areas that control specific movements, and the sequences of movements that are required in the behavior, and so forth.

In other words there is still a single, simple representation of the fingertips in this most organized of cortical areas of the surface of the skin of the body.

And yet, if you take, for example, subclinical osteoporosis, a bone thinning disease, the precondition, otherwise known as osteopenia, you would have to treat 270 women for three years in order to prevent one broken bone.

That says to me, at least in rats and I think they have the same neurotransmitters that we do and a similar cortical architecture that play may be pretty important for our survival.

And it's important, if you try to model this, you can think about normal development as a loss of cortical mass, loss of cortical gray matter, and what's happening in schizophrenia is that you overshoot that mark, and at some point, when you overshoot, you cross a threshold, and it's that threshold where we say, this is a person who has this disease, because they have the behavioral symptoms of hallucinations and delusions.

Howard's about this high, and he's round, and he's in his 60s, and he has big huge glasses and thinning gray hair, and he has a kind of wonderful exuberance and vitality, and he has a parrot, and he loves the opera, and he's a great aficionado of medieval history.

And what was interesting was that in this one region, the 50 year old meditators had the same amount of cortex as the 25 year olds, suggesting that meditation practice may actually slow down or prevent the natural age related decline in cortical structure.

And if we take a slice of cortical tissue with one month of age and we simply look at those neurons, those are those black bodies that you see there, and the little processes that issue from them, they look like spiders, those are the dendrites that connect to other neurons.