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DictionarySeeforamenParietal Foramen
Parietal Foramen the medial foramen between the parietal or frontal bones for the eyelike pineal body; it is characteristic of ancient lower vertebrates, including reptiles. It has been preserved in the tuatara, in many lizards, and in such fishes as sheatfish and fishes of the family Acipenseridae. In ancient armored fishes, the parietal foramen could be paired to correspond to two eyelike organs, the pineal body and the epiphysis. parietal foramen
pa·ri·e·tal fo·ra·men [TA] an inconstant foramen in the parietal bone occasionally found bilaterally near the sagittal margin posteriorly; when present it transmits an emissary vein to the superior sagittal sinus. Synonym(s): foramen parietale [TA]pa·ri·e·tal for·a·men (pă-rī'ĕ-tăl fōr-ā'mĕn) [TA] An inconstant foramen in the parietal bone occasionally found bilaterally near the sagittal margin posteriorly; when present, it transmits an emissary vein to the superior sagittal sinus. parietal foramenA hole near the superior (sagittal) edge of the parietal bone of the skull through which a vein and sometimes an artery passes. This foramen is not always present. See also: foramen |