Abstract
Cerebral vascular accidents may be defined as sudden events occurring in the cerebrum caused by diseases of the blood vessels. Simple description of the various types of accidents and discussion of differential diagnosis are beyond the scope of this paper. Structural and Functional Considerations Several anatomic and physiological facts are important to consider in discussing treatment of the more common types of cerebral vascular accidents. Effective collateral circulation is possible in the brain. Vasospasm, with resultant structural defects, has been observed. Sludging of blood as a transient phenomenon has been observed in superficial arteries. The humoral and nervous control of circulation in the brain is highly developed. Disease of the blood vessels in the brain is manifest clinically by the secondary effects on functioning nervous tissue. Moreover, at autopsy, the secondary effects overshadow or obscure the primary blood vessel lesion. These features complicate the evaluation of the effects of therapy,
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