| sulcus nervi oculomotorii | 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) |
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| sulcus nervi petrosi majoris | <anatomy, nerve> The groove on the anterior surface of the petrous part of the temporal bone that lodges the greater petrosal nerve. Synonym: sulcus nervi petrosi majoris. (05 Mar 2000) |
| sulcus nervi petrosi minoris | <anatomy, nerve> The groove on the anterior surface of the petrous part of the temporal bone that accommodates the lesser petrosal nerve in its course to the otic ganglion. Synonym: sulcus nervi petrosi minoris. (05 Mar 2000) |
| sulcus nervi radialis | <anatomy, nerve> The shallow groove that passes around the shaft of the humerus; it lodges the radial nerve and deep brachial artery. Synonym: sulcus nervi radialis, musculospiral groove, spiral groove. (05 Mar 2000) |
| 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) |
| 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) |
| nuclei nervi cochlearis | The nucleus cochlearis dorsalis and nucleus cochlearis ventralis, located on the dorsal and lateral surface of the inferior cerebellar peduncle, in the floor of the lateral recess of the rhomboid fossa. They receive the incoming fibres of the cochlear part of the vestibulocochlear nerve and are the major source of origin of the lateral lemniscus or central auditory pathway. Synonym: cochlear nuclei, nuclei nervi cochlearis. (05 Mar 2000) |
| nuclei nervi vestibulocochlearis | The combined cochlear and vestibular nuclei in the brainstem that receive the incoming fibres of the eighth cranial nerve. See: vestibular nucleus. Synonym: nuclei nervi vestibulocochlearis. (05 Mar 2000) |
| nucleus dorsalis nervi vagi | The visceral motor nucleus located in the vagal trigone (ala cinerea) of the floor of the fourth ventricle. It gives rise to the parasympathetic fibres of the vagus nerve innervating the heart muscle and the smooth musculature and glands of the respiratory and intestinal tracts. Synonym: nucleus dorsalis nervi vagi, dorsal motor nucleus of vagus, dorsal nucleus of vagus, dorsal vagal nucleus, nucleus alae cinereae. (05 Mar 2000) |
| nucleus motorius nervi trigemini | <anatomy, nerve> A group of motor neurons innervating the muscles of mastication (masseter, temporalis, internal and external pterygoid muscles) and the musculi tensor tympani and tensor veli palatini. The nucleus lies in the upper pontine tegmentum medial to the main sensory nucleus of the trigeminus. Synonym: nucleus motorius nervi trigemini, masticatory nucleus, motor nucleus of trigeminus, nucleus masticatorius. (05 Mar 2000) |
| nucleus nervi abducentis | Nucleus of abducent nervenucleus abducentis, a group of motor neurons in the lower part of the pons, innervating the lateral rectus muscle of the eye; unique among motor cranial nerve nuclei in that it consists of two distinct populations of neurons: neurons that give rise to fibres forming the abducens nerve root and those internuclear neurons whose processes cross the midline, ascend in the opposite medial longitudinal fasciculus, and terminate upon specific oculomotor neurons; considered a primary centre for mechanisms controlling conjugate horizontal gaze. Synonym: nucleus nervi abducentis. (05 Mar 2000) |
| nucleus nervi facialis | A group of motor neurons located in the ventrolateral region of the lower pontine tegmentum and innervating the facial muscles, the stapedius muscle in the middle ear, the posterior limb of the musculus digastricus, and the stylohyoid muscle. Synonym: nucleus nervi facialis, facial motor nucleus, motor nucleus of facial nerve, nucleus facialis. (05 Mar 2000) |
| nucleus nervi hypoglossi | The motor nucleus innervating the intrinsic and four of the five extrinsic muscles of the tongue; it is located in the medulla oblongata near the midline, immediately beneath the floor of the inferior recess of the rhomboid fossa. Synonym: nucleus nervi hypoglossi, nucleus of hypoglossal nerve. (05 Mar 2000) |
| nucleus nervi oculomotorii | The composite group of motor neurons innervating all of the external eye muscles except the musculus rectus lateralis and musculus obliquus superior, and including the musculus levator palpebrae superioris; the most rostral component of the nucleus is the Edinger-Westphal nucleus which innervates the musculi sphincter pupillae and ciliaris via the ciliary ganglion. The oculomotor nucleus lies in the rostral half of the midbrain, near the midline in the most ventral part of the central gray substance; fibres of the medial longitudinal fasciculus form its lateral borders. Synonym: nucleus nervi oculomotorii, nucleus of oculomotor nerve. (05 Mar 2000) |
| nucleus nervi trochlearis | A group of motor neurons innervating the superior oblique muscle of the contralateral eye. The nucleus lies in the caudal half of the midbrain, behind the oculomotor nucleus, in the most ventral part of the central gray substance, near the midline. Synonym: nucleus nervi trochlearis, nucleus of trochlear nerve. (05 Mar 2000) |