| tegmen mastoideum | The lamina of bone roofing over the mastoid cells. (05 Mar 2000) |
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| antrum mastoideum | A cavity in the petrous portion of the temporal bone, communicating posteriorly with the mastoid cells and anteriorly with the epitympanic recess of the middle ear via the aperture of the mastoid antrum. Synonym: antrum mastoideum, tympanic antrum, Valsalva's antrum. (05 Mar 2000) |
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| emissarium mastoideum | <anatomy, vein> The vein that connects the sigmoid sinus with the occipital vein or one of the tributaries of the external jugular vein by way of the mastoid foramen. Synonym: vena emissaria mastoidea, emissarium mastoideum. (05 Mar 2000) |
| foramen mastoideum | An opening at the posterior portion of the mastoid process, transmitting the mastoid branch of the occipital artery to the dura and an emissary vein to the sigmoid sinus. Synonym: foramen mastoideum. (05 Mar 2000) |
| tegmen | Origin: L, fr. Tegere, tectum, to cover. 1. A tegument or covering. 2. <botany> The inner layer of the coating of a seed, usually thin and delicate; the endopleura. 3. <zoology> One of the elytra of an insect, especially of certain Orthoptera. 4. <zoology> Same as Tectrices. Source: Websters Dictionary (01 Mar 1998) |
| tegmen cruris | Old term for tegmentum mesencephali. (05 Mar 2000) |
| tegmen tympani | The roof of the middle ear, formed by the thinned anterior surface of the petrous portion of the temporal bone. Its anterior edge is inserted into the petrosquamous fissure so that it can be seen as a wedge of bone subdividing that fissure into a squamo tympanic and a petrotympanic fissure. Synonym: roof of tympanum. (05 Mar 2000) |
| tegmen ventriculi quarti | Roof of fourth ventricle, formed in its upper part by the superior medullary velum stretching between the two brachia conjunctiva (superior cerebellar peduncles), in its lower part by the inferior medullary velum composed of the choroid membrane and choroid plexus of the fourth ventricle. Synonym: roof of fourth ventricle. (05 Mar 2000) |
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