| cingulate sulcus | A fissure on the mesial surface of the cerebral hemisphere, bounding the upper surface of the cingulate gyrus (callosal convolution); the anterior portion is called the pars subfrontalis; the posterior portion which curves up to the superomedial margin of the hemisphere and borders the paracentral lobule posteriorly, the pars marginalis. Synonym: sulcus cinguli, callosomarginal fissure, callosomarginal sulcus, sulcus callosomarginalis, sulcus of cingulum. (05 Mar 2000) |
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| marginal part of orbicularis oris muscle | <anatomy> The part of the orbicularis oris muscle located in the margin of the lips, i.e., the red area. Synonym: pars marginalis musculi orbicularis oris. (05 Mar 2000) |
| cingulate | Relating to a cingulum. (05 Mar 2000) |
| cingulate convolution | cingulate gyrus |
| cingulate herniation | Displacement of the cingulate gyrus beneath the falx. (05 Mar 2000) |
| isthmus of cingulate gyrus | The narrowing of the cingulate gyrus, at its transition with the hippocampal gyrus behind and below the splenium of the corpus callosum, caused by the anterior extension of the conjoined parieto-occipital and calcarine sulci. Synonym: isthmus gyri cinguli, isthmus of gyrus fornicatus, isthmus of limbic lobe. (05 Mar 2000) |
| marginal | Occurring at or very close to the margin. (09 Oct 1997) |
| marginal adaptation | <dentistry> The degree of proximity and interlocking of filling material to the wall of the cavity of a tooth. The term has come to be used synonymously with adaptation at the cavosurface margin. (12 Dec 1998) |
| marginal artery of colon | Artery formed by anastomoses between the right and left colic artery's; it passes downward from the left colic flexure to the aboral end of the pelvic colon. Synonym: artery of Drummond, Riolan's arc. (05 Mar 2000) |
| marginal artery of drummond | <radiology> Formed by, right and left br. Of middle colic a., and left and right colic aa., runs along mesenteric border of colon, supplies vasa recta (12 Dec 1998) |
| marginal band | A bundle of equatorially located microtubules that stabilise the biconvex shape of platelets and avian erythrocytes. They are unusual in that they do not derive from the centrosomal microtubule organising centre. (18 Nov 1997) |
| marginal blepharitis | Inflammation of the margins of the eyelids. Synonym: ciliary blepharitis, marginal blepharitis. Meibomian blepharitis, inflammation of the eyelid margin and the meibomian glands. (05 Mar 2000) |
| marginal corneal degeneration | Bilateral opacification and vascularization of the periphery of the cornea, progressing to formation of a gutter and ectasia. Synonym: ectatic marginal degeneration of cornea. (05 Mar 2000) |
| marginal crest | The rounded borders which form the mesial and distal margins of the occlusal surface of a tooth. Synonym: crista marginalis, marginal ridge. (05 Mar 2000) |
| marginal fasciculus | A longitudinal bundle of thin, unmyelinated and poorly myelinated fibres capping the apex of the posterior horn of the spinal gray matter, composed of posterior root fibres and short association fibres that interconnect neighboring segments of the posterior horn. Synonym: fasciculus dorsolateralis, tractus dorsolateralis, dorsolateral tract, fasciculus marginalis, Lissauer's bundle, Lissauer's column, Lissauer's fasciculus, Lissauer's marginal zone, Lissauer's tract, marginal fasciculus, Spitzka's marginal tract, Spitzka's marginal zone, Waldeyer's tract, Waldeyer's zonal layer. (05 Mar 2000) |