part of part of cranium anterior cranial fossa NCIT:C32090 UBERON:0003720 The floor of the anterior fossa is formed by the orbital plates of the frontal, the cribriform plate of the ethmoid, and the small wings and front part of the body of the sphenoid; it is limited behind by the posterior borders of the small wings of the sphenoid and by the anterior margin of the chiasmatic groove. The lesser wings of the sphenoid separate the anterior and middle fossae. anterior fossa FMA:9682 MESH:D035262 Wikipedia:Anterior_cranial_fossa GAID:83 cranial fossa