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2. a spur-shaped structure.
calcar a´vis an eminence on the medial wall of the occipital horn of the lateral ventricle, below the bulb of the occipital horn, produced by lateral extension of the calcarine sulcus.
the lower of two elevations on the medial wall of the posterior horn of the lateral ventricle of the brain, caused by the depth of the calcarine sulcus.
Etymology: L, calcar, spur, avis, bird
a projection on the medial wall of the posterior horn of the lateral ventricle of the brain. It is associated with the lateral extension of the calcarine fissure. Also called hippocampus minor.
Haller,Albrecht von, Swiss physiologist, 1708-1777.
Haller annulus - Synonym(s): Haller insula
Haller ansa - Synonym(s): communicating branch of facial nerve with glossopharyngeal nerve
Haller circle - (1) a network of branches of the short ciliary arteries on the sclera around the point of entrance of the optic nerve. Synonym(s): vascular circle of optic nerve; (2) a venous plexus in the areola surrounding the nipple.Synonym(s): areolar venous plexus
Haller cones - the coiled portion of the efferent ductules that constitute the head of the epididymis. Synonym(s): lobules of epididymis
Haller habenula - rarely used term for the cordlike remains of the vaginal process of the peritoneum. Synonym(s): Scarpa habenula
Haller insula - a doubling of the thoracic duct for part of its course through the thorax. Synonym(s): Haller annulus
Haller line - a thickened band of pia mater along the midline of the anterior surface of the spinal cord. Synonym(s): linea splendens
Haller plexus - a nervous plexus of sympathetic filaments and branches of the external laryngeal nerve on the surface of the inferior constrictor muscle of the pharynx.
Haller rete - the network of canals at the termination of the straight tubules in the mediastinum testis. Synonym(s): rete testis
Haller tripod - abdominal artery. Synonym(s): celiac trunk
Haller tunica vasculosa - the vascular, pigmentary, or middle coat of the eye, comprising the choroid, ciliary body, and iris. Synonym(s): vascular tunic of eye
Haller unguis - the lower of two elevations on the medial wall of the posterior horn of the lateral ventricle of the brain. Synonym(s): calcar avis
Haller vas aberrans - a narrow, coiled tubule frequently connected to the first part of the ductus deferens or to the lower part of the ductus epididymitis. Synonym(s): inferior aberrant ductule
Haller vascular tissue - the outer portion of the choroid of the eye containing the largest blood vessels. Synonym(s): vascular lamina of choroid
Morand,Sauveur F., French surgeon, 1697-1773.
Morand foot - a foot having eight toes.
Morand spur - the lower of two elevations on the medial wall of the posterior horn of the lateral ventricle of the brain. Synonym(s): calcar avis
a spur or spur-shaped structure.
the lower of two medial elevations in the lateral cerebral ventricle, produced by the lateral extension of the calcarine sulcus; called also hippocampus minor.
calcar metacarpale, calcar metatarsale