Resumen de Ultrastructural characteristics of blood vessels in the infant and adult human cerebral cortex
H. F. Zhang, W.Y. Ong, S.K. Leong, L. J. Garey
Blood vesse ls in fro nt a l a nd te mp o ra l cerebral cortex of ad ults and two in fa nts aged 5 mo nths and 5 yea rs we re stud ied by e lec tron mi croscopy. The ce lls o utside the endothe lium were cl assified o n the ir ultrastructural characteristics. Fibroblasts had prominent ro ugh endoplasmi c re ti culum and few mitocho ndri a in the cy top lasm . They we re d iffe re nt from pe ri cy tes, which contained a prominent Golgi apparatus but onl y a few, isolated profil es of ro ugh endoplasmi c reti culum .
Smooth muscle cells we re distinguished from fibroblasts and pericytes by the presence of filaments and caveolae .
Peri vasc ul ar cells were characterised by the presence of Iysosomes and granules of diffe rent sizes and e lec tron densit ies, and were present at all ages studied . Plasma cells had abundant rough e ndoplasmic reticulum in the cyto pl asm , and were present only in the 5-mo nth-o ld in fa nt cortex. Corti ca l vesse l di amete r inc reased w ith age.
