| foramen of transverse process | Foramen processus transversus. Synonym: foramen processus transversi, foramen transversarium, foramen vertebroarterialis, foramen of transverse process, vertebroarterial foramen. (05 Mar 2000) |
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| foramen of vena cava | An opening in the right lobe of the central tendon of the diaphragm which transmits the inferior vena cava and branches of the right phrenic nerve. Synonym: foramen venae cavae, foramen of vena cava, foramen quadratum. (05 Mar 2000) |
| foramen omentale | The passage, below and behind the portal hepatis, connecting the two sacs of the peritoneum; it is bounded anteriorly by the hepatoduodenal ligament and posteriorly by a peritoneal fold over the inferior vena cava. Synonym: foramen omentale, foramen epiploicum, aditus ad saccum peritonei minorem, Duverney's foramen, Winslow's foramen. (05 Mar 2000) |
| foramen opticum | The short canal through the lesser wing of the sphenoid bone at the apex of the orbit that gives passage to the optic nerve and the ophthalmic artery. Synonym: canalis opticus, foramen opticum, optic foramen. (05 Mar 2000) |
| foramen ovale | <anatomy, cardiology> The communication between the two atria of the foetal heart. If it remains open (atrial septal defect), then blood will shunt from left to right. (04 Apr 1998) |
| foramen palatinum majus | An opening in the posterolateral corner of the hard palate opposite the last molar tooth, marking the lower end of the pterygopalatine canal. Synonym: foramen palatinum majus, anterior palatine foramen. (05 Mar 2000) |
| foramen parietale | 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: foramen parietale. (05 Mar 2000) |
| foramen petrosum | An occasional opening in the greater wing of the sphenoid bone, between the foramen spinosum and foramen ovale, which transmits the lesser petrosal nerve. Synonym: foramen petrosum, canaliculus innominatus, foramen of Arnold. (05 Mar 2000) |
| foramen processus transversi | Foramen processus transversus. Synonym: foramen processus transversi, foramen transversarium, foramen vertebroarterialis, foramen of transverse process, vertebroarterial foramen. (05 Mar 2000) |
| foramen quadratum | An opening in the right lobe of the central tendon of the diaphragm which transmits the inferior vena cava and branches of the right phrenic nerve. Synonym: foramen venae cavae, foramen of vena cava, foramen quadratum. (05 Mar 2000) |
| foramen rotundum | <anatomy> An opening in the base of the greater wing of the sphenoid bone, transmitting the maxillary nerve. Synonym: round foramen. (05 Mar 2000) |
| foramen singulare | A foramen in the internal acoustic meatus, posterior to the cochlear area, that transmits the nerves to the ampulla of the posterior saemicircular duct. Synonym: foramen singulare. (05 Mar 2000) |
| foramen sphenopalatinum | The foramen formed from the sphenopalatine notch of the palatine bone in articulation with the sphenoid bone; it transmits the sphenopalatine artery and accompanying nerves. Synonym: foramen sphenopalatinum. (05 Mar 2000) |
| foramen spinosum | <anatomy> Transmits middle meningeal artery (12 Dec 1998) |
| foramen stylomastoideum | The distal or external opening of the facial canal on the inferior surface of the petrous portion of the temporal bone, between the styloid and mastoid processes; it transmits the facial nerve and stylomastoid artery. Synonym: foramen stylomastoideum. (05 Mar 2000) |