| Breschet's hiatus | <anatomy> The opening by which the two scalae communicate at the top of the cochlea of the ear. Origin: NL, fr. Gr, a helix + a hole. Source: Websters Dictionary (01 Mar 1998) |
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| Breschet, Gilbert | <person> French anatomist, 1784-1845. See: Breschet's bones, Breschet's canals, Breschet's hiatus, Breschet's sinus, Breschet's vein. (05 Mar 2000) |
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| Breschet's bones | One of the small ossicles occasionally found in the ligaments of the sternoclavicular articulation. Synonym: Breschet's bones, episternal bone, suprasternal bone. (05 Mar 2000) |
| Breschet's canals | Channels in the diploe that accommodate the diploic veins. Synonym: canales diploici, Breschet's canals. (05 Mar 2000) |
| Breschet's sinus | A paired dural venous sinus beginning on the parietal bone, running along the sphenoidal ridges and emptying into the cavernous sinus. Synonym: sinus sphenoparietalis, Breschet's sinus, sinus alae parvae. (05 Mar 2000) |
| Breschet's vein | <anatomy, vein> One of the veins in the diploe of the cranial bones, connected with the cerebral sinuses by emissary veins; the main diploic veins are the frontal, anterior temporal, posterior temporal, and occipital. Synonym: vena diploica, Breschet's vein, Dupuytren's canal. (05 Mar 2000) |
| adductor hiatus | The aperture in the aponeurotic insertion of the adductor magnus that transmits the femoral artery and vein from the adductor canal to the popliteal space. Synonym: hiatus tendineus, hiatus adductorius, femoral opening, tendinous opening. (05 Mar 2000) |
| aortic hiatus | The opening in the diaphragm bounded by the two crura, the vertebral column, and the median arcuate ligament, through which pass the aorta and thoracic duct. Synonym: hiatus aorticus, aortic foramen, aortic opening. (05 Mar 2000) |
| maxillary hiatus | The large opening into the maxillary sinus on the nasal surface of the maxilla. Synonym: hiatus maxillaris. (05 Mar 2000) |
| pleuropericardial hiatus | An opening connecting the pleural and pericardial cavities; usually the result of incomplete development of the pleuropericardial fold of the embryo. (05 Mar 2000) |
| pleuroperitoneal hiatus | An opening through the diaphragm, connecting pleural and peritoneal cavities, usually the result of defective development of the pleuroperitoneal membrane in the embryo; if the defect is extensive there may be herniation of digestive organs into the pleural cavity. See: diaphragmatic hernia. Synonym: Bochdalek's foramen. (05 Mar 2000) |
| cornu inferius marginalis falciformis hiatus sapheni | The lower part of the falciform margin of the opening in the fascia lata through which the greater saphenous vein passes. Synonym: cornu inferius marginalis falciformis hiatus sapheni. (05 Mar 2000) |
| sacral hiatus | A normally-occurring gap at the lower end of the sacrum, exposing the vertebral canal, due to failure of the laminae of the last sacral segment to coalesce. It is closed by the sacrococcygeal ligament, and provides cannular access to the sacral epidural space for administration of anaesthetics (caudal nerve blocks). Synonym: hiatus sacralis. (05 Mar 2000) |
| saphenous hiatus | The opening in the fascia lata inferior to the medial part of the inguinal ligament through which the saphenous vein passes to enter the femoral vein. Synonym: hiatus saphenus, fossa ovalis, saphenous hiatus. (05 Mar 2000) |
| scalene hiatus | Triangular gap bounded by the scalenus anterior and scalenus medius muscles and the first rib to which the muscles attach; the hiatus provides passage for the subclavian artery and the roots of the brachial plexus. Compression of the structures passing through the hiatus by any means is manifest as "thoracic outlet syndrome." Synonym: interscalene triangle. (05 Mar 2000) |
| Scarpa's hiatus | <anatomy> The opening by which the two scalae communicate at the top of the cochlea of the ear. Origin: NL, fr. Gr, a helix + a hole. Source: Websters Dictionary (01 Mar 1998) |
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