| limbus fossae ovalis | A muscular ring surrounding the fossa ovalis in the wall of the right atrium of the heart. Synonym: annulus ovalis, margin of fossa ovalis, Vieussens' annulus, Vieussens' isthmus, Vieussens' limbus, Vieussens' ring. (05 Mar 2000) |
|---|---|
| cisterna | 1. Any cavity or enclosed space serving as a reservoir, especially for chyle, lymph, or cerebrospinal fluid. 2. An ultramicroscopic space occurring between the membranes of the flattened sacs of the endoplasmic reticulum, the Golgi complex, or the two membranes of the nuclear envelope. Synonym: cistern. Origin: L. An underground cistern for water, fr. Cista, a box (05 Mar 2000) |
| cisterna ambiens | <anatomy, vein> An expansion of the subarachnoid space extending forward between the corpus callosum and the thalamus; it encloses the internal cerebral veins which caudally join to form the vena magna cerebri (Galen's vein). Synonym: ambient cistern, Bichat's canal, Bichat's foramen, cistern of great vein of cerebrum, cisterna ambiens, cisterna superioris, cisterna venae magnae cerebri, superior cistern. (05 Mar 2000) |
| cisterna basalis | A dilation of the subarachnoid space in front of the pons, where the arachnoid membrane stretches across between the two temporal lobes over the base of the diencephalon. See: interpeduncular fossa. Synonym: cisterna interpeduncularis, basal cistern, cisterna basalis, cisterna cruralis, Tarin's space. (05 Mar 2000) |
| cisterna caryothecae | The space between the internal and external membranes of the nuclear envelope; may be continuous in places with cisterns of the endoplasmic reticulum. Synonym: cistern of nuclear envelope, perinuclear space. (05 Mar 2000) |
| cisterna cerebellomedullaris | The largest of the subarachnoid cisterns between the cerebellum and the medulla oblongata; may be divided into a dorsal cistern located between the cerebellum and dorsal surface of the medulla (cisterna magna) and a lateral cistern located between the cerebellum and the lateral aspect of the medulla. Synonym: cisterna cerebellomedullaris, cisterna magna. (05 Mar 2000) |
| cisterna chiasmatis | A dilation of the subarachnoid space below and anterior to the optic chiasm. Synonym: cisterna chiasmatis, cistern of chiasm. (05 Mar 2000) |
| cisterna chyli | A dilated sac at the lower end of the thoracic duct into which the intestinal trunk and two lumbar lymphatic trunks open; it occurs inconstantly and when present is located posterior to the aorta on the anterior aspect of the bodies of the first and second lumbar vertebrae. Synonym: ampulla chyli, chyle cistern, chylocyst, Pecquet's cistern, Pecquet's reservoir, receptaculum chyli, receptaculum pecqueti. (05 Mar 2000) |
| cisterna cruralis | A dilation of the subarachnoid space in front of the pons, where the arachnoid membrane stretches across between the two temporal lobes over the base of the diencephalon. See: interpeduncular fossa. Synonym: cisterna interpeduncularis, basal cistern, cisterna basalis, cisterna cruralis, Tarin's space. (05 Mar 2000) |
| cisterna interpeduncularis | A dilation of the subarachnoid space in front of the pons, where the arachnoid membrane stretches across between the two temporal lobes over the base of the diencephalon. See: interpeduncular fossa. Synonym: cisterna interpeduncularis, basal cistern, cisterna basalis, cisterna cruralis, Tarin's space. (05 Mar 2000) |
| cisterna magna | The largest of the subarachnoid cisterns between the cerebellum and the medulla oblongata; may be divided into a dorsal cistern located between the cerebellum and dorsal surface of the medulla (cisterna magna) and a lateral cistern located between the cerebellum and the lateral aspect of the medulla. Synonym: cisterna cerebellomedullaris, cisterna magna. (05 Mar 2000) |
| cisterna perilymphatica | Space between the bony and membranous portions of the labyrinth. Synonym: spatium perilymphaticum, cisterna perilymphatica. (05 Mar 2000) |
| cisterna pontis | An upward continuation of the subarachnoid space of the spinal cord, continuous about the medulla with the cerebellomedullary cisternl; may be divided into inferior (containing roots of C.N. 9-12) and superior (containing root of C.N. 5, 7, 8) parts. Synonym: cisterna pontis. (05 Mar 2000) |
| cisterna superioris | <anatomy, vein> An expansion of the subarachnoid space extending forward between the corpus callosum and the thalamus; it encloses the internal cerebral veins which caudally join to form the vena magna cerebri (Galen's vein). Synonym: ambient cistern, Bichat's canal, Bichat's foramen, cistern of great vein of cerebrum, cisterna ambiens, cisterna superioris, cisterna venae magnae cerebri, superior cistern. (05 Mar 2000) |
| subsurface cisterna | A cistern of the endoplasmic reticulum that lies close to the plasma membrane; such cisternae occur especially in the cell bodies of neurons. (05 Mar 2000) |