| lateral aperture of the fourth ventricle | One of the two lateral openings of the fourth ventricle into the subarachnoid space at the cerebellopontine angle. Synonym: apertura lateralis ventriculi quarti, foramen lateralis ventriculi quarti, foramen of Key-Retzius, foramen of Luschka, Retzius' foramen. (05 Mar 2000) |
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| lateral arcuate ligament | <anatomy> One of Haller's arches; a thickening of the fascia of the quadratus lumborum muscle between the transverse process of the first lumbar vertebra and the twelfth rib on either side that gives attachment to a portion of the diaphragm. Synonym: ligamentum arcuatum laterale, arcus lumbocostalis lateralis, lateral lumbocostal arch. (05 Mar 2000) |
| lateral atlantoaxial joint | A condylar synovial joint between the inferior articular facets of the atlas and the superior articular facets of the axis. Synonym: articulatio atlantoaxialis lateralis, lateral atlantoepistrophic joint. (05 Mar 2000) |
| lateral atlantoepistrophic joint | A condylar synovial joint between the inferior articular facets of the atlas and the superior articular facets of the axis. Synonym: articulatio atlantoaxialis lateralis, lateral atlantoepistrophic joint. (05 Mar 2000) |
| lateral atrial vein | A vein draining deep portions of the temporal and parietal lobes; it runs in the lateral wall of the lateral ventricle to terminate in the superior thalamostriate vein. Synonym: vena ventriculi lateralis lateralis, lateral atrial vein, lateral vein of lateral ventricle. (05 Mar 2000) |
| lateral basal branch | Lateral basal branch of the following: 1) basal part of inferior lobar branch of right pulmonary artery; 2) basal part of inferior lobar branch of left pulmonary artery. Synonym: ramus basalis lateralis. (05 Mar 2000) |
| lateral basal segment | Lateral basal segment of inferior lobe of right and left lung; between anterior and posterior basal segments. Synonym: segmentum basale laterale. (05 Mar 2000) |
| lateral bicipital groove | at the cubital fossa, the groove separating the biceps brachii and brachialis muscles on the lateral side. Synonym: sulcus bicipitalis lateralis. (05 Mar 2000) |
| lateral branches | Branches directed away from the midline, to the side. Nomina Anatomica lists lateral branches (ramus lasteralis/rami laterales) of the following: 1) anterior interventricular artery, ramus lateralis interventricularis anterioris arteriae coronariae sinistrae; 2) anterolateral central arteries, rami laterales arteriarum centralium anterolateralium; 3) dorsal primary rami of spinal nerves, rami laterales ramorum dorsalium nervorum cervicalium/thoracalium/lumbalium/sacralium; 4) left branch of portal vein, rami laterales rami sinistri venae portae hepatis; 5) left hepatic duct, ramus lateralis ductus hepatici sinistri; 6) middle lobe branch of right pulmonary artery, ramus lateralis ramorum lobarium medium arteriorum pulmonarium dextrum; 7) supraorbital nerve, ramus lateralis nervi supraorbitalis. Synonym: rami laterales. (05 Mar 2000) |
| lateral calcaneal branches of sural nerve | <anatomy, nerve> Branches of sural nerve providing cutaneous innervation to posterior aspect of distal leg and lateral aspect of proximal portion of foot. Synonym: rami calcanei laterales nervi suralis. (05 Mar 2000) |
| lateral canal | A channel leading from the root pulp laterally through the dentin to the periodontal tissue; may be found anywhere in the tooth root, but is more common in the apical third of the root. Synonym: lateral canal. (05 Mar 2000) |
| lateral canthus | The angle formed by the junction of the lateral parts of the upper and lower eyelids. Synonym: angulus oculi lateralis, angulus oculi temporalis, external canthus, lateral canthus. (05 Mar 2000) |
| lateral cartilage | Cartilaginous plates that extend above the hoof from the caudal angles of the distal phalanx of the horse; they are readily palpated under the skin of the sides of the hoof and assist in distributing the animal's weight during locomotion. (05 Mar 2000) |
| lateral cartilage of nose | The cartilage located in the lateral wall of the nose above the alar cartilage. Synonym: cartilago nasi lateralis. (05 Mar 2000) |
| lateral cartilaginous layer | The narrow lateral portion of the cartilaginous part of the auditory tube. Synonym: lamina lateralis cartilaginis tubae auditivae, lamina cartilaginis lateralis tubae auditivae, lateral cartilaginous layer, lateral layer of cartilaginous auditory tube. (05 Mar 2000) |