This provides redundancies or collaterals in the cerebral circulation so that, if one system is blocked or narrowed, the other can take over.
12.
A catheter is inserted into a blood vessel, typically the femoral artery, and passed through blood vessels into the cerebral circulation and the aneurysm.
13.
The actual blood flow caudally through these arteries, derived from the posterior cerebral circulation, is inadequate to maintain the spinal cord beyond the cervical segments.
14.
"They were very clever about how they did this, " says Robert Bryan of Baylor College of Medicine in Houston, who researches cerebral circulation control.
15.
Stress causes alterations of cerebral circulation, increasing blood flow in the supramarginal gyrus and angular gyrus of the parietal lobe, the frontal lobe, and the superior temporal gyrus of the left hemisphere.
16.
The hypothesis that she investigated proposes that trepanation improves cerebral circulation by allowing the " full heartbeat " to express itself, which Feilding hypothesises cannot normally occur after fusion of the cranial bones.
17.
They also stimulate cerebral circulation and metabolism, protect brain cells from free radical damage ( cancer cells ), and increase the synthesis and activity of neurotransmitters, through which brain cells communicate with each other.
18.
His interest in the cerebral circulation led him to work in the neurology laboratory of Dr . Jaquinot ( Salp�tri�re hospital ) where he used one of the first Doppler ultrasonic machines ( Delalande Electronique ).
19.
An experimental drug derived from the venom of a pit viper is helping stroke victims recover their physical and mental abilities, according to scientists reporting at last week's American Heart Association International Conference on Stroke and Cerebral Circulation.
20.
In case one of the supply arteries is occluded, the Circle of Willis provides interconnections between the anterior and the posterior cerebral circulation along the floor of the cerebral vault, providing blood to tissues that would otherwise become ischemic.
