| obturator externus | <anatomy, muscle> Origin, lower half of margin of obturator foramen and adjacent part of external surface of obturator membrane; insertion, trochanteric fossa of greater trochanter; action, rotates thigh laterally; nerve supply, obturator. Synonym: musculus obturator externus, external obturator muscle. (05 Mar 2000) |
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| externus | <anatomy> Situated or occurring on the outside, many anatomical structures formerly called external are now more correctly termed lateral. Origin: L. Externus = outside (18 Nov 1997) |
| area nervi facialis | <anatomy, nerve> The area in the fundus of the internal acoustic meatus superior to the transverse crest through which the facial nerve passes to enter the facial canal. Synonym: area nervi facialis. (05 Mar 2000) |
| arteria comes nervi phrenici | <anatomy, artery> Origin, internal thoracic; distribution, pericardium, diaphragm, and pleura; anastomoses, musculophrenic, inferior phrenic, mediastinal and pericardial branches of the internal thoracic. Synonym: arteria pericardiacophrenica, arteria comes nervi phrenici. (05 Mar 2000) |
| arteria comitans nervi ischiadici | <anatomy, nerve> Origin, inferior gluteal; distribution, sciatic nerve; anastomoses, branches of profunda femoris. Synonym: arteria comitans nervi ischiadici, companion artery to sciatic nerve. (05 Mar 2000) |
| arteria comitans nervi mediani | <anatomy, artery> Origin, anterior interosseous; distribution, accompanies median nerve to palm; anastomoses, branches of superficial palmar arch. Synonym: arteria comitans nervi mediani, arteria mediana. (05 Mar 2000) |
| canalis nervi facialis | The bony passage in the temporal bone through which the facial nerve passes; the facial canal commences at the internal auditory meatus with the horizontal part which passes at first anteriorly (medial crus of facial canal) then turns posteriorly at the geniculum of the facial canal to pass medial to the tympanic cavity (lateral crus of facial canal); finally, it turns downward (descending part of facial canal) to reach the stylomastoid foramen. Synonym: canalis nervi facialis, aqueductus fallopii, fallopian aqueduct, fallopian canal. (05 Mar 2000) |
| canalis nervi petrosi superficialis minoris | <anatomy, nerve> The small opening in the petrous bone lateral to the hiatus of facial canal that gives passage to the lesser petrosal nerve. Synonym: hiatus canalis nervi petrosi minoris, Arnold's canal, canalis nervi petrosi superficialis minoris. (05 Mar 2000) |
| vaginae nervi optici | Sheaths of the optic nerve, formed by extensions of the central meninges. See: internal sheath of optic nerve, external sheath of optic nerve. (05 Mar 2000) |
| vagina externa nervi optici | <anatomy, nerve> The outer sheath around the optic nerve, continuous with the dura mater. Synonym: vagina externa nervi optici, dural sheath of optic nerve. (05 Mar 2000) |
| vagina interna nervi optici | <anatomy, nerve> The innermost sheath around the optic nerve, continuous with the leptomeninges (pia-arachnoid) and including a cerebrospinal fluid-filled intervaginal space, continuous with the subarachnoid space. Synonym: vagina interna nervi optici. (05 Mar 2000) |
| radices nervi trigemini | <anatomy, nerve> Collective term for the sensory root of trigeminal nerve and motor root of trigeminal nerve. Synonym: radices nervi trigemini. (05 Mar 2000) |
| radix inferior nervi vestibulocochlearis | <anatomy, nerve> One of the components of the vestibulocochlear nerve; it is made up of the central processes of the bipolar neurons which compose the spiral (cochlear) ganglion in the spiral canal of the modiolus of the bony cochlea; the cochlear root enters the cranial cavity by passing in fascicles through the spiral foraminous tract at the bottom of the internal auditory meatus; it enters the brainstem through the pontomedullary groove, closely adhering to the caudoventral aspect of the vestibular root, and distributes its fibres to the ventral and dorsal cochlear nuclei in the floor of the lateral recess of the fourth ventricle. Synonym: radix cochlearis, cochlear root of vestibulocochlear nerve, inferior root of vestibulocochlear nerve, radix inferior nervi vestibulocochlearis. (05 Mar 2000) |
| radix lateralis nervi mediani | <anatomy, nerve> The part of the median nerve arising from the lateral cord of the brachial plexus. Synonym: radix lateralis nervi mediani. (05 Mar 2000) |
| radix medialis nervi mediani | <anatomy, nerve> The part of the median nerve coming from the medial cord of the brachial plexus. Synonym: radix medialis nervi mediani. (05 Mar 2000) |