Commissure also often refers to cardiac anatomy of heart valves. In the heart, a commissure is the area where the valve leaflets abut. When such an abutment is abnormally stiffened or even fused, valvular stenosis results, sometimes requiring commissurotomy.
It may refer to the junction of the upper and lower mandibles of a bird's beak,[1] or alternately, to the full-length apposition of the closed mandibles, from the corners of the mouth to the tip of the beak.[2]
It may refer to the nasal and temporal meeting points of the upper and lower eyelids (the medial and lateral canthi).
In female genitalia, the joining points of the two folds of the labia majora create two commissures - the anterior commissure just anterior to the prepuce of the clitoris, and the posterior commissure of the labia majora, directly posterior to the frenulum of the labia minora and anterior to the perineal raphe.
In biology, the meeting of the two valves of a brachiopod or clam is a commissure; in botany, the term is used to denote the place where a fern's laterally expanded vein endings come together in a continuous marginal sorus.
commissure, commissure, location, which, objects, abut, joined, term, used, especially, fields, anatomy, biology, most, common, usage, term, refers, brain, commissures, which, there, least, nine, such, commissure, bundle, commissural, fibers, tract, that, cros. A commissure ˈ k ɒ m e ʃ er is the location at which two objects abut or are joined The term is used especially in the fields of anatomy and biology The most common usage of the term refers to the brain s commissures of which there are at least nine Such a commissure is a bundle of commissural fibers as a tract that crosses the midline at its level of origin or entry as opposed to a decussation of fibers that cross obliquely The nine are the anterior commissure posterior commissure corpus callosum commissure of fornix hippocampal commissure habenular commissure ventral supraoptic decussation Meynert s commissure anterior hypothalamic commissure of Gasner and the interthalamic adhesion They consist of fibre tracts that connect the two cerebral hemispheres and span the longitudinal fissure In the spinal cord there are the anterior white commissure and the gray commissure Commissural neurons refer to neuronal cells that grow their axons across the midline of the nervous system within the brain and the spinal cord Commissure also often refers to cardiac anatomy of heart valves In the heart a commissure is the area where the valve leaflets abut When such an abutment is abnormally stiffened or even fused valvular stenosis results sometimes requiring commissurotomy The term may also refer to the junction of the upper and lower lips see labial commissure of mouth It may refer to the junction of the upper and lower mandibles of a bird s beak 1 or alternately to the full length apposition of the closed mandibles from the corners of the mouth to the tip of the beak 2 It may refer to the nasal and temporal meeting points of the upper and lower eyelids the medial and lateral canthi In female genitalia the joining points of the two folds of the labia majora create two commissures the anterior commissure just anterior to the prepuce of the clitoris and the posterior commissure of the labia majora directly posterior to the frenulum of the labia minora and anterior to the perineal raphe In biology the meeting of the two valves of a brachiopod or clam is a commissure in botany the term is used to denote the place where a fern s laterally expanded vein endings come together in a continuous marginal sorus See also editDecussationReferences edit Coues Elliott 1890 Handbook of Field and General Ornithology London Macmillan and Co p 155 OCLC 263166207 Campbell Bruce Lack Elizabeth eds 1985 A Dictionary of Birds Carlton England T and A D Poyser p 105 ISBN 0 85661 039 9 nbsp This anatomy article is a stub You can help Wikipedia by expanding it vte nbsp This biology article is a stub You can help Wikipedia by expanding it vte Retrieved from https en wikipedia org w index php title Commissure amp oldid 1200901128, wikipedia, wiki, book, books, library,
