| lateral cerebral sulcus | The deepest and most prominent of the cortical fissures, extending from the anterior perforated substance first laterally at the deep incisure between the frontal and temporal lobes, then back and slightly upward over the lateral aspect of the cerebral hemisphere, with the superior temporal gyrus as its lower bank, the insula forming its greatly expanded floor. Two short side branches, the ramus anterior and ramus ascendens, divide the inferior frontal gyrus into an orbital part, triangular part, and opercular part. Synonym: sulcus lateralis cerebri, fissura cerebri lateralis, lateral cerebral fissure, sylvian fissure, fissure of Sylvius. (05 Mar 2000) |
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| lateral occipital sulcus | One of several variable sulci on the lateral aspect of the occipital lobe of each cerebral hemisphere, bounding the lateral occipital convolutions. Synonym: sulcus occipitalis lateralis. (05 Mar 2000) |
| lateral mammary branches of lateral cutaneous branches of intercostal nerves | Branches arising from the lateral cutaneous branches of the ventral primary rami of spinal nerves (intercostal nerves) T-3 to T-6 which run anteriorly to supply the lateral aspect of the breast. Synonym: rami mammarii laterales rami cutanei lateralis nervorum thoracicorum, rami mammarii laterales rami cutanei lateralis nervorum intercostalium, lateral mammary branches of lateral cutaneous branches of intercostal nerves. (05 Mar 2000) |
| lateral mammary branches of lateral thoracic artery | <anatomy, artery> Branches of the lateral thoracic artery which extend around the lateral borders of the pectoral muscles to supply the lateral aspect of the breast and mammary gland. Synonym: rami mammarii laterales arteriae thoracicae lateralis. (05 Mar 2000) |
| lateral vein of lateral ventricle | 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) |
| posterior intermediate sulcus | A longitudinal furrow between the posterior median and the posterolateral sulci of the spinal cord in the cervical region, marking the gracile fasciculus from the cuneate fasciculus. Synonym: sulcus intermedius posterior, posterior intermediate groove. (05 Mar 2000) |
| posterior median sulcus of medulla oblongata | The longitudinal groove marking the posterior midline of the medulla oblongata; continuous below with the posterior median sulcus of the spinal cord. Synonym: sulcus medianus posterior medullae oblongatae, posterior median fissure of the medulla oblongata. (05 Mar 2000) |
| posterior parolfactory sulcus | A shallow groove on the medial surface of the hemisphere demarcating the subcallosal gyrus or precommissural septum from the parolfactory area. Synonym: sulcus parolfactorius posterior. (05 Mar 2000) |
| sulcus auriculae posterior | The sulcus between the antitragus and cauda helicis overlying the antitragicohelicine fissure. Synonym: sulcus auriculae posterior. (05 Mar 2000) |
| sulcus intermedius posterior | A longitudinal furrow between the posterior median and the posterolateral sulci of the spinal cord in the cervical region, marking the gracile fasciculus from the cuneate fasciculus. Synonym: sulcus intermedius posterior, posterior intermediate groove. (05 Mar 2000) |
| sulcus interventricularis posterior | A groove on the diaphragmatic surface of the heart, marking the location of the septum between the two ventricles. Synonym: sulcus interventricularis posterior, crena cordis. (05 Mar 2000) |
| sulcus lateralis posterior | A longitudinal furrow on either side of the posterior median sulcus of the spinal cord marking the line of entrance of the posterior nerve roots. Synonym: sulcus lateralis posterior, posterolateral groove. (05 Mar 2000) |
| sulcus medianus posterior medullae oblongatae | The longitudinal groove marking the posterior midline of the medulla oblongata; continuous below with the posterior median sulcus of the spinal cord. Synonym: sulcus medianus posterior medullae oblongatae, posterior median fissure of the medulla oblongata. (05 Mar 2000) |
| sulcus medianus posterior medullae spinalis | A shallow furrow in the median line of the posterior surface of the spinal cord. Synonym: sulcus medianus posterior medullae spinalis, posterior median fissure of spinal cord. (05 Mar 2000) |
| sulcus parolfactorius posterior | A shallow groove on the medial surface of the hemisphere demarcating the subcallosal gyrus or precommissural septum from the parolfactory area. Synonym: sulcus parolfactorius posterior. (05 Mar 2000) |