Commissure also often refers to cardiac anatomy ofheart 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 requiringcommissurotomy.
It may refer to the junction of the upper and lower mandibles of abird'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 lowereyelids (the medial and lateralcanthi).
In thevulva, the joining points of the two folds of thelabia 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.
Inbiology, the meeting of the two valves of abrachiopod orclam is a commissure; inbotany, the term is used to denote the place where afern's laterally expanded vein endings come together in a continuous marginalsorus.
