| lamina spiralis ossea | A double plate of bone winding spirally around the modiolus dividing the spiral canal of the cochlea incompletely into two, scala tympani and scala vestibuli; between the two plates of this lamina the fibres of the cochlear nerve reach the spiral organ (of Corti). Synonym: lamina spiralis ossea, spiral plate. (05 Mar 2000) |
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| lamina spiralis secundaria | A ridge on the outer wall of the first turn of the cochlea opposite the spiral lamina. Synonym: lamina spiralis secundaria, secondary spiral plate. (05 Mar 2000) |
| limbus laminae spiralis osseae | The border of the spiral lamina; the thickened periosteum covering the upper plate of the bony spiral lamina of the cochlea. Synonym: limbus laminae spiralis osseae. (05 Mar 2000) |
| linea spiralis | A rough line that separates the neck and shaft of the femur anteriorly; it passes downward and medially from the greater trochanter to the lesser trochanter and continues into the medial lip of the linea aspera. Synonym: linea intertrochanterica, linea spiralis, spiral line. (05 Mar 2000) |
| Amussat's valvula | Anomalous folds occurring at the level of the seminal colliculus. Synonym: Amussat's valvula. (05 Mar 2000) |
| valvula | <anatomy> A small valve, once used in official nomenclature as a general term to designate a valve, such as in the heart, but in NA restricted to designation of a cusp of the aortic valve of the valve of the pulmonary trunk or the valves of the anus, foramen ovale, navicular fossa, coronary sinus, inferior vena cava or of the lymphatic vessels and veins. (18 Nov 1997) |
| valvula bicuspidalis | <anatomy, cardiology> The heart valve that divides the left atrium and left ventricle. During left atrial contraction, the mitral valve opens to allow blood to flow into the left ventricle. Upon closure, the mitral valve prohibits the regurgitation of blood back into the left atrium. The mitral valve is the only heart valve that has only 2 valve cusps (all others have 3). (13 Nov 1997) |
| valvula foraminis ovalis | A fold projecting into the left atrium from the margin of the foramen ovale in the foetus; when, with beginning inspiration, the blood pressure within the left atrium increases, the valve closes and its edges become adherent to the margin of the foramen ovale, occluding it. Synonym: valvula foraminis ovalis, falx septi, valve of oval foramen. (05 Mar 2000) |
| valvula fossae navicularis | A fold of mucous membrane sometimes found in the root of the navicular fossa of the urethra. Synonym: valvula fossae navicularis, Guerin's fold, Guerin's valve. (05 Mar 2000) |
| valvula lymphatica | One of the delicate semilunar valves found in lymphatic vessels; they are usually paired and similar in structure to venous valves and occur at close intervals along the vessel wall. Synonym: valvula lymphatica. (05 Mar 2000) |
| valvula processus vermiformis | A fold of mucous membrane, simulating a valve, sometimes found at the origin of the vermiform appendix. Synonym: Gerlach's valve, valvula processus vermiformis. (05 Mar 2000) |
| valvula pylori | A prominent fold of mucous membrane at the gastroduodenal junction overlying the pyloric sphincter. Synonym: pyloric valve, valvula pylori, valvulae pylori. (05 Mar 2000) |
| valvula semilunaris | <anatomy, cardiology> Refers to a type of valve, aortic or pulmonic valves. (27 Sep 1997) |
| valvula semilunaris anterior valvae trunci pulmonalis | Anterior semilunar cusp of the pulmonary valve. (05 Mar 2000) |
| valvula semilunaris dextra valvae aortae | Right semilunar cusp of the aortic valve. (05 Mar 2000) |