Why do I say that the incidence of cerebral arteriosclerosis is the basis of stroke

Arteriosclerosis is a cerebral thrombosis or insufficiency of the most common causes. It is the pathological basis of intima deep steatosis and cholesterol deposition formation of atherosclerotic plaque. Bifurcation lesions in the arteries in the earliest, and more serious, and then spread to other parts. Unevenness involvement artery thickness, and the smaller lumen bending elastic layer damage in the middle thinning. This can damage blood vessels dilated, spindle formation of veins, easily rupture and hemorrhage. On the other hand, due to impaired vascular lumen within narrow, rough wall, vascular resistance increased blood flow slow, often cerebral insufficiency or cerebral thrombosis.
Thus stroke incidence of cerebral arteriosclerosis is the foundation.