| sulcus nervi spinalis | <anatomy, nerve> The laterally directed groove on the superior surface of the transverse processes of typical cervical vertebrae between the anterior and posterior tubercles along which the emerging spinal nerve passes. Synonym: sulcus nervi spinalis. (05 Mar 2000) |
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| sulcus nervi ulnaris | <anatomy, nerve> A furrow on the posterior surface of the medial epicondyle of the humerus, lodging the ulnar nerve. Synonym: sulcus nervi ulnaris. (05 Mar 2000) |
| sulcus nymphocaruncularis | A groove between the labium minor and the border of the remains of the hymen, in which is the opening of the duct of the greater vestibular gland on either side. Synonym: nymphohymenal sulcus, sulcus nymphocaruncularis. (05 Mar 2000) |
| sulcus obturatorius | A deep groove on the inner surface of the superior ramus of the pubis. Synonym: sulcus obturatorius. (05 Mar 2000) |
| sulcus occipitalis lateralis | 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) |
| sulcus occipitalis superior | One of several small and variable sulci bordering the superior occipital gyri on the upper aspect of the occipital lobe of the cerebrum. Synonym: sulcus occipitalis superior. (05 Mar 2000) |
| sulcus occipitalis transversus | The posterior, vertical limb of the intraparietal sulcus. Synonym: sulcus occipitalis transversus. (05 Mar 2000) |
| sulcus occipitotemporalis | A long, deep sagittal fissure on the undersurface of the temporal lobe, marking the border between the fusiform gyrus laterally and the hippocampal and lingual gyri medially; the great depth of the collateral sulcus results in a bulging of the floor of the occipital and temporal horn of the lateral ventricle, the collateral eminence. Synonym: sulcus collateralis, sulcus occipitotemporalis, collateral fissure, fissura collateralis, occipitotemporal sulcus. (05 Mar 2000) |
| sulcus of cingulum | A fissure on the mesial surface of the cerebral hemisphere, bounding the upper surface of the cingulate gyrus (callosal convolution); the anterior portion is called the pars subfrontalis; the posterior portion which curves up to the superomedial margin of the hemisphere and borders the paracentral lobule posteriorly, the pars marginalis. Synonym: sulcus cinguli, callosomarginal fissure, callosomarginal sulcus, sulcus callosomarginalis, sulcus of cingulum. (05 Mar 2000) |
| sulcus of corpus callosum | The fissure between the corpus callosum and the cingulate gyrus. Synonym: sulcus corporis callosi, callosal sulcus. (05 Mar 2000) |
| sulcus of occipital artery | A narrow groove medial to the mastoid notch of the temporal bone that lodges the occipital artery. Synonym: sulcus arteriae occipitalis, sulcus of occipital artery. (05 Mar 2000) |
| sulcus of promontory of tympanic cavity | A narrow branched groove running vertically over the surface of the promontory in the middle ear, lodging the tympanic plexus. Synonym: sulcus promontorii cavitatis tympanicae. (05 Mar 2000) |
| sulcus of pterygoid hamulus | A groove at the base of the hamular process which forms a pulley for the tendon of the tensor veli palatini muscle. Synonym: sulcus hamuli pterygoidei, sulcus of pterygoid hamulus. (05 Mar 2000) |
| sulcus of sclera | A slight groove on the external surface of the eyeball indicating the line of union of the sclera and cornea or limbus of cornea. Synonym: sulcus sclerae, sulcus of sclera. (05 Mar 2000) |
| sulcus of the oculomotor nerve | A groove in the lateral wall of the interpeduncular fossa of the midbrain from which the rootlets of the oculomotor nerve emerge. Synonym: sulcus medialis cruris cerebri, sulcus nervi oculomotorii, sulcus of the oculomotor nerve. (05 Mar 2000) |
| infrapalpebral sulcus | The hollow or furrow below the lower eyelid. Synonym: sulcus infrapalpebralis. (05 Mar 2000) |
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| internal spiral sulcus | A concavity in the floor of the cochlear duct formed by the overhanging labium vestibulare. Synonym: sulcus spiralis internus. (05 Mar 2000) |
| interparietal sulcus | A horizontal sulcus extending back from the postcentral sulcus over some distance, then dividing perpendicularly into two branches so as to form, with the postcentral sulcus, a figure H. It divides the parietal lobe into superior and inferior parietal lobules. Synonym: sulcus intraparietalis, interparietal sulcus, intraparietal sulcus of Turner, Turner's sulcus. (05 Mar 2000) |
| intertubercular sulcus | A furrow running down the shaft of the humerus between the two tubercles, lodging the tendon of the long head of the biceps, and giving attachment in its floor to the latissimus dorsi muscle. Synonym: sulcus intertubercularis, bicipital groove, intertubercular sulcus. (05 Mar 2000) |
| intragracile sulcus | A fissure between the gracilis minor and gracilis posterior lobuli of the cerebellum. Synonym: sulcus intragracilis. (05 Mar 2000) |
| intraparietal sulcus | A horizontal sulcus extending back from the postcentral sulcus over some distance, then dividing perpendicularly into two branches so as to form, with the postcentral sulcus, a figure H. It divides the parietal lobe into superior and inferior parietal lobules. Synonym: sulcus intraparietalis, interparietal sulcus, intraparietal sulcus of Turner, Turner's sulcus. (05 Mar 2000) |
| intraparietal sulcus of Turner | A horizontal sulcus extending back from the postcentral sulcus over some distance, then dividing perpendicularly into two branches so as to form, with the postcentral sulcus, a figure H. It divides the parietal lobe into superior and inferior parietal lobules. Synonym: sulcus intraparietalis, interparietal sulcus, intraparietal sulcus of Turner, Turner's sulcus. (05 Mar 2000) |
| occipitotemporal sulcus | A long, deep sagittal fissure on the undersurface of the temporal lobe, marking the border between the fusiform gyrus laterally and the hippocampal and lingual gyri medially; the great depth of the collateral sulcus results in a bulging of the floor of the occipital and temporal horn of the lateral ventricle, the collateral eminence. Synonym: sulcus collateralis, sulcus occipitotemporalis, collateral fissure, fissura collateralis, occipitotemporal sulcus. (05 Mar 2000) |
| olfactory sulcus | The sagittal sulcus on the inferior or orbital surface of each frontal lobe of the cerebrum, demarcating the straight gyrus from the orbital gyri, and covered on the orbital surface by the olfactory bulb and tract. Synonym: sulcus olfactorius, olfactory groove. (05 Mar 2000) |
| olfactory sulcus of nasal cavity | The narrow groove in the nasal cavity above the agger nasi that leads from the atrium to the olfactory area. Synonym: sulcus olfactorius cavum nasi. (05 Mar 2000) |
| talar sulcus | The groove on the inferior surface of the talus, which with a corresponding groove on the calcaneus forms the sinus tarsi. Synonym: sulcus tali, interosseous groove, talar sulcus. (05 Mar 2000) |
| terminal sulcus | Sulcus terminalis linguae; a V-shaped groove, with apex pointing backward, on the surface of the tongue, marking the separation between the oral, or horizontal, and the pharyngeal, or vertical, parts, sulcus terminalis atrii dextri; a groove on the surface of the right atrium of the heart, marking the junction of the primitive sinus venosus with the atrium. Synonym: terminal sulcus. (05 Mar 2000) |
| tonsillolingual sulcus | The space between the palatine tonsil and the tongue. (05 Mar 2000) |
| transverse occipital sulcus | The posterior, vertical limb of the intraparietal sulcus. Synonym: sulcus occipitalis transversus. (05 Mar 2000) |
| Turner's sulcus | A horizontal sulcus extending back from the postcentral sulcus over some distance, then dividing perpendicularly into two branches so as to form, with the postcentral sulcus, a figure H. It divides the parietal lobe into superior and inferior parietal lobules. Synonym: sulcus intraparietalis, interparietal sulcus, intraparietal sulcus of Turner, Turner's sulcus. (05 Mar 2000) |