Original scientific paper
The Fate of the Arachnoid Villi in Humans
Jelena Krmpotić-Nemanić
Ivan Vinter
Zlatko Kelović
Slaven Suknaić
Abstract
Villi arachnoidales undergoes in the course of life changes in relation to the skull
bones and sinuses. Our aim was to determine the relations of the villi arachnoidales to
the skull bone and/or sinuses from the neonatal period to adults. The investigations
were performed on collection of 50 disarticulated macerated skull bones from the newborn
to 30 years of age and on 20 skulls from individuals in the life period from 30 to 80
years of age. Villi arachnoidales produced imprints on the skull bones in the shape of
holes and/or furrows corresponding to different shape of the villi arachnoidales. These
imprints appeared very early in the period when the bony sprouts of the large skull
bones received a thin covering of compact bone, the future lamina vitrea. At that time
villi arachnoidales had no connection with the dural sinuses but with the diploe and
with the diploic veins. By agglomeration of the villi in larger and large formations,
granula meningea, Pacchionian granulations, the contact to sinuses was realized by
means of short channels. The structural changes of villi arachnoidales may produce
thrombophlebitis and hydrocephalus externus, especially in children. The fate and the
relations of the villi arachnoidales are therefore of great importance for neurologist,
neurosurgeon and otorhinolaryngologist.
Keywords
villi arachnoidales; skull bones; arachnoidea; diploic veins; foveolae granulares; Pacchionian granulations; hydrocephalus
Hrčak ID:
28180
URI
Publication date:
15.12.2003.
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