American Heritage® Dictionary of the English Language, Fourth Edition
- n. An archlike anatomical structure or fold, such as the arched band of white matter located beneath the corpus callosum of the brain.
Century Dictionary and Cyclopedia
- n. In anat.: A median symmetrical arched formation in the brain, beneath the corpus callosum and septum lucidum, vaulting over the optic thalami and the third ventricle, and running into the floor of each lateral ventricle. In the human brain it consists of two longitudinal bundles of fibers, one on each side, which rise from the corpora albicantia, pass up, as the anterior pillars of the fornix, in front of the foramina of Monro and behind the anterior commissure, then, somewhat flattened and in apposition to each other, arch backward beneath the corpus callosum and above the velum interpositum, forming the body of the fornix, and then diverge toward the back part of the corpus callosum, to turn down, as the posterior pillars of the fornix (crura Iornicis), into the floor of the descending cornua of the lateral ventricles, where their free edges form the fimbriæ. See cut under
- n. Some other arched, vaulted, or fornicated formation: as, the fornix conjunctivœ, the vault of the conjunctiva.
- n. In conch.: The vaulted or excavated part of a shell under the umbo.
- n. The more concavo-convex one of the shells of an inequivulve bivalve, as an oyster.
- n. In botany, a small arching crest or appendage in the throat or tube of a corolla.
- n. In topical geom., a part of a surface which, in conjunction with another similar part which inseparably accompanies it, increases the cyclosis of the surface by two. If cut away, it would leave two holes in the surface. Viewed from one side of the surface, it appears as a tubular bar (however much distorted or knotted) bridging the space from the edge of one hole to that of the other and leaving a transverse tunnel beneath formed by the twin fornix; while viewed from the other side it appears as a tunnel joining one hole to the other with a transverse bridge above formed by the twin fornix.
- n. anatomy An archlike structure or fold.
- n. anatomy Specifically, the arched bundle of fibres or axons at the base of the brain.
GNU Webster's 1913
- n. An arch or fold
- n. Esp., two longitudinal bands of white nervous tissue beneath the lateral ventricles of the brain.
- n. generally any arch shaped structure (but often it refers to the arched roof of an anatomical space)
- n. an arched bundle of white fibers at the base of the brain by which the hippocampus of each hemisphere projects to the contralateral hippocampus and to the thalamus and mamillary bodies
- Latin, arch, vault; see gwher- in Indo-European roots. (American Heritage® Dictionary of the English Language, Fourth Edition)
“HOLISTIC MEDICINE It receives afferents via inferior colliculi (inferior corpora quadrigemina) and medial geniculate bodies (part of thalamus) from COCHLEA, via olfactory tracts from OLFACTORY NEUROEPITHELIUM and via fornix [ "fornix" means arch] from MAMILLARY BODIES and probably from VESTIBULAR NUCLEUS on its posterior aspect where equilibrium sense is projected.”
“The vagina and its neighbors, including the following: vagina, hymen, urethral sponge, fornix (part of the vagina), cervix, os (part of the cervix), and pubococcygeus (PC) muscle.”
“In addition, the pyramidal cells send their axons into a large fiber tract (the fornix), which allows the pyramidal cells to be identified electrophysiologically by stimulating the axons in the fornix and backfiring the pyramidal cells.”
“The choroid vein runs along the whole length of the choroid plexus, and receives veins from the hippocampus, the fornix, and the corpus callosum.”
“In the female the posterior wall and fornix of the vagina, and the cervix and body of the uterus can be felt in front, while somewhat laterally the ovaries can just be reached.”
“Aside from the fibers of the fornix which pass through the mammillary body to decussate and descend (as the mammillo-mesencephalic fasciculus), many fibers are said to pass into the bundle of Vicq dAzyr, and one bundle of fibers is said to pass from the fornix to the tuber cinereum.”
“The fornix probably brings the cortical centers into relation with the reflex path that runs from the primary centers to the mammillary body and the tuber cinereum.”
“Axons from the indusium pass into the longitudinal striæ, some running forward and others backward while some after entering the medial longitudinal stria, pierce the corpus callosum to join the fornix.”
“As the fornix passes beneath the corpus callosum it receives fibers from the longitudinal striæ of the indusium and from the cingulum; these are the perforating fibers of the fornix which pass through the corpus callosum and course in the fornix toward the mammillary body.”
“Most of the fibers in the fornix, however, pass through the corpora, cross the middle line and turn downward in the reticular formation in which they are said to be traceable as far as the pons and possibly farther.”
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abducens.....draw..., ablation.....carr..., acetylcholine......., adrenalin.....nea..., afferent.....to c..., agnosia.....no kn..., alar.....wing-like, alexia.....no words, alveus.....canal, amacrine.....no l..., ambidextrous........, ambiguus.....doub... and 701 more...
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