An arachnoid mater that surrounds a brain. [ OBOL:automatic ]
Synonyms: arachnoidea mater cranialis cranial arachnoid mater brain arachnoid matter arachnoidea mater encephali
Term information
- UMLS:C1707346
- NCIT:C49331
- MA:0000814
- FMA:83981
- EMAPA:32661
- VHOG:0000230
The middle membrane of the three mammalian meninges covering the brain and spinal cord. [TFD][VHOG]
In fishes, the meninges consist of a single membrane, the primitive meninx, wrapped around the brain and spinal cord. With the adoption of terrestrial life, the meninges doubled. In amphibians, reptiles, and birds, the meninges include a thick outer dura mater derived from mesoderm and a thin inner secondary meninx. (...) In mammals, the dura mater persists, but division of the secondary meninx yields both the arachnoid and the pia mater from ectomesoderm.[well established][VHOG]