granulationes arachnoideae

[TA] granulationes arachnoideales arachnoid granulations: small elevations, visible to the naked eye, thought by some to be enlargements of arachnoid villi, which project into the superior sagittal sinus and associated venous lacunae and create slight depressions on the inner surface of the cranium; these granulations are the structures through which cerebrospinal fluid is reabsorbed into the blood in the venous system. Called also arachnoidal granulations or villi, cerebral granulations, meningeal granules, and pacchionian bodies, corpuscles, or granulations.