Dal Borgo, V.; Niceta, P.
August 1960
Angiology;Aug1960, Vol. 11 Issue 4, p313
Academic Journal
A previous study of the middle cerebral artery demonstrated that the resistance to pressure of the anterior perforating branch was less than that of the superficial branches, and the hypothesis was advanced that the differences in resistance were due to differences in structure. In order to check this hypothesis histologically, the anterior perforating branches and some superficial branches of the middle cerebral arteries were removed from the brains of 21 adults, and the relative thicknesses of the tunica mediae were compared. Instead of the absolute thickness of the tunica media, were varies with the diameter of the artery, a parameter, M, was determined, where M is the ratio of the thickness of the tunica media to the external diameter of the artery. Measurements were made, not of the stained arterial preparation itself, but of its projection on graph paper, by means of a planimeter and a curvimeter. The M values were extremely variable, and were not correlated with type of superficial arterial branch, hemisphere of the brain, or age or sex of the person. This evidence indicates that the two types of arterial branches are structurally similar, and suggests that the differences in resistance to pressure are due to differences in topographic position.


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