| The
pressure which pushes blood into the arteries within the brain is
the arterial pressure from the heart pumping, minus the pressure within
the brain (intracranial pressure). This is known as the cerebral
perfusion pressure. When the pressure in the brain increases
(such as is that case after significant trauma to the brain), then
the perfusion pressure decreases, and when it gets low enough, blood
can no longer get to the brain, and irreversible brain damage will
ensue. |
