In fact, the so what is, in the brain, changes in neural activity, the things that make your brain work, the things that make your software work in your brain, are tightly correlated with changes in blood flow.

Blood flows through blood vessels.

It is used to investigate the effects of high G forces on pilots.

Blood runs in the veins.

Brain aneurysm,probably.I don't know.

The verdict in both cases cerebral haemorrhage.

Subdural hematoma.

And for more than 200 years we have

When I made love with my wife, I had no sperm that came out of me

She is bleeding!

So thrombi are these blood clots that form, that can help to obstruct a blood vessel.

You have spilled your own blood rather than that of an innocent.

It's a lonely thing, a violin.

No bloodshed in all the city.

Blood has been spilled this night.

They had this motto

leads to wounds that don't heal, heart attacks,

When an area of the brain is active, meaning a neural area is active, it gets blood flow shunted to that area.

So let's take a cut through the brain here, and imagine that Beck was hooked up to a SPECT scan.

Imagine the blood flowing through your body

So it would be destructing the blood flow downstream right over there.

Herniation of the brain stem due to intracerebral hemorrhage.

But when you change those behaviors, your brain gets more blood, you think more clearly, you have more energy, your heart gets more blood in ways I've shown you.

its cells respond far more vigorously, and their metabolic requirement increases, and so more blood is channeled to that part of the brain, and this change in blood flow can be captured by these scanners.

Drain the remainder of his brain.

The blood ran red.

Scientists, sort of at the end of the 20th century,

So again this is right when the heart is squeezing blood out. So we know blood is flowing through here.

That's usually the flow of blood.

This is blood for blood, and by the gallons.

I don't want any bloodshed.

Only fresh zombies bleed, son.

And I bleed... and dance... and plead...

A blood vessel burst inside his brain.

And when I said body, I really mean lots of things.

SPECT imaging is a brain scanning technology that uses a radioactive tracer to track blood flow in the brain.

Has anyone in your family ever suffered

So you can imagine if you have these things build up, it's narrowing the actual vessel that's supplying blood downstream from that obstruction.

Blood poured from the cut vein.

In that general process we talk about the restriction of blood flow, that is ischemia that's happening.

You make a blood flow movie, you have an independent proxy of brain activity.

Blood ran from his wound.

So there's this actual extra little step here, where blood is going to and from the lungs, and that's the pulmonary flow.

I can hear your blood flowing.

Not everything has to be bang... I'm set. Scream, blood, more blood.