Also found in: Dictionary, Thesaurus, Encyclopedia.
Related to arachnoid granulations: arachnoid trabeculae
tufted prolongations of pia-arachnoid, composed of numerous arachnoid villi that penetrate dural venous sinuses and effect transfer of cerebrospinal fluid to the venous system. In older people, these are more numerous and tend to calcify.
arachnoid granulationsSmall fibrovascular nodules located on the superior sagittal sinus and adjacent venous lacunae, which are responsible for reabsorbing cerebrospinal fluid.
a·rach·noid gran·u·lat·ions(ă-rak'noyd gran-yū-lā'shŭnz) [TA]
Pacchioni,Antonio, Italian anatomist, 1665-1726.
pacchionian bodies - tufted prolongations of pia-arachnoid. Synonym(s): arachnoid granulations; pacchionian corpuscles; pacchionian glands; pacchionian granulations
pacchionian corpuscles - Synonym(s): pacchionian bodies
pacchionian depressions - pits on the inner surface of the skull in which are lodged the arachnoidal granulations. Synonym(s): granular pits
pacchionian glands - Synonym(s): pacchionian bodies
pacchionian granulations - Synonym(s): pacchionian bodies