| epiploic foramen | 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) |
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| ethmoidal foramen | Either of two foramina formed by grooves on either edge of the ethmoidal notch of the frontal bone, and completed by similar grooves on the ethmoid bone: anterior ethmoidal foramen, located in an anterior position; posterior ethmoidal foramen located in a posterior position. Synonym: foramen ethmoidale. (05 Mar 2000) |
| jugular foramen | A passage between the petrous portion of the temporal bone and the jugular process of the occipital, sometimes divided into two by the intrajugular processes; it contains the internal jugular vein, inferior petrosal sinus, the glossopharyngeal, vagus, and accessory nerves, and meningeal branches of the ascending pharyngeal and occipital arteries. Synonym: foramen jugulare, foramen lacerum posterius. (05 Mar 2000) |
| jugular foramen syndrome | <syndrome> Unilateral paralysis of the larynx and velum palati, with contralateral loss of pain and temperature sensibility in the parts below. Synonym: jugular foramen syndrome. (05 Mar 2000) |
| external acoustic foramen | The orifice of the external acoustic meatus in the tympanic portion of the temporal bone. Synonym: porus acusticus externus, external acoustic foramen, external acoustic pore, external auditory pore, external auditory foramen, orifice of external acoustic meatus. (05 Mar 2000) |
| external auditory foramen | The orifice of the external acoustic meatus in the tympanic portion of the temporal bone. Synonym: porus acusticus externus, external acoustic foramen, external acoustic pore, external auditory pore, external auditory foramen, orifice of external acoustic meatus. (05 Mar 2000) |
| Ferrein's foramen | The opening on the anterior aspect of the petrous part of the temporal bone which leads to the facial canal and gives passage to the greater petrosal nerve. Synonym: hiatus canalis nervi petrosi majoris, fallopian hiatus, Ferrein's foramen, hiatus canalis facialis, hiatus of canal for greater petrosal nerve. (05 Mar 2000) |
| zygomaticofacial foramen | The opening on the lateral surface of the zygomatic bone below the orbital margin that transmits the zygomaticofacial nerve. Synonym: foramen zygomaticofaciale, malar foramen. (05 Mar 2000) |
| zygomatico-orbital foramen | The common opening on the orbital surface of the zygomatic bone of the canals transmitting the zygomaticofacial and zygomaticotemporal nerves; sometimes each of these canals has a separate opening on the orbital surface. Synonym: foramen zygomatico-orbitale. (05 Mar 2000) |
| zygomaticotemporal foramen | The opening, on the temporal surface of the zygomatic bone, of the canal that gives passage to the zygomaticotemporal nerve. Synonym: foramen zygomaticotemporale. (05 Mar 2000) |
| lacerated foramen | <anatomy> An irregular aperture, filled with cartilage (basilar cartilage) in the living, located between the apex of the petrous part of the temporal bone, the body of the sphenoid, and the basilar part of the occipital bones. Several structures pass along the margins of the foramen in a nearly horizontal direction but no structures pass through vertically. Synonym: foramen lacerum medium, lacerated foramen, sphenotic foramen. (05 Mar 2000) |
| foramen | <anatomy> A small opening, perforation, or orifice; a fenestra. Foramen of Monro, the opening connecting the sac of the omentum with the general cavity of the peritoneum. Origin: L, fr. Forare to bore, pierce. (04 Apr 1998) |
| foramen apicis dentis | The opening at the apex of the root of a tooth that gives passage to the nerve and blood vessels. Synonym: foramen apicis dentis, apical dental foramen, root foramen. (05 Mar 2000) |
| foramen bursae omentalis majoris | <anatomy, embryology> A foramen produced by two folds of peritoneum, that covering the common/proper hepatic artery on the right and that covering the left gastric artery on the left, which encroach upon and constrict the omental bursa. It forms a communication between the superior recess of the lesser sac which lies above it and the remainder of the omental bursa. (12 Sep 2002) |
| foramen caecum linguae | <anatomy> A median pit on the dorsum of the posterior part of the tongue, from which the limbs of a V-shaped furrow run forward and outward; it is the site of origin of the thyroid gland and subsequent thyroglossal duct in the embryo. Synonym: foramen caecum linguae, blind foramen of the tongue, caecal foramen of the tongue, Morgagni's foramen, pleuroperitoneal foramen. (05 Mar 2000) |