RESUMO
The findings enumerated and discussed in this report may be summarized as follows: a. The caliber of the individual cerebral arteries in adult Filipinos would correspond to those figures found arranged and tabulated in table Ib. On the basis of the figures in table I and excluding all other factors that might have any bearing on the conditions of the case, the blood supply to the average Filipino cerebrum would be 3,240 cubic millimeters per secondc. The left half of the cerebrum would appear to receive more blood than the right to the extent of a difference of 12 cubic millimeters per second, or to the extent of a 0.093 mm difference in the sum of the circumferences of the three cerebral arteries on each sided. The middle cerebral artery is invariably the largest of the cerebral arteries on each side of the cerebrum. The anterior cerebral artery comes next in size, followed by the posterior cerebral artery which is the smalleste. Full development of the cerebral arteries appears to be attained within the ll to 20 year age period in general. Full development for the females, however, seems to take place a little laterf. From the ll to 20 year age period on, size differences in the cerebral arteries between the males and the females can be better appreciated because the changes are more extreme, more abrupt, more variable, and more irregular in the females. At the 71 to 80 years period in males, as much blood goes to the brain as in the previous age periods. In the females, the cerebral circulation for the same age period definitely drops downFurther details relating to the age and sex variations of the total blood supply, the hemi-cerebral blood supply, and the local blood supply by the individual arteries can be obtained by referring to tables, to the graphs, and to the main body of this article. (Summary)