| oculomotor nucleus | 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) |
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| oculomotor response | Widespread myogenic potential evoked by visual stimuli. (05 Mar 2000) |
| oculomotor root of ciliary ganglion | A branch of the oculomotor nerve supplying parasympathetic preganglionic nerve fibres to the ciliary ganglion. Synonym: radix parasympathica ganglii ciliaris, radix oculomotoria ganglii ciliaris, motor root of ciliary ganglion, oculomotor root of ciliary ganglion, radix brevis ganglii ciliaris, short root of ciliary ganglion. (05 Mar 2000) |
| oculomotor system | That part of the central nervous system having to do with eye movements; it is composed of pathways connecting various regions of the cerebrum, brainstem, and ocular nuclei, utilizing multisynaptic articulations. (05 Mar 2000) |
| oculomotorius | Synonym: oculomotor nerve. Origin: L. (05 Mar 2000) |
| oculomucocutaneous | Pertaining to or affecting the mucous membrane and the skin around the eyes. (18 Nov 1997) |
| oculonasal | <anatomy> Of or pertaining to the region of the eye and the nose; as, the oculonasal, or nasal, nerve, one of the branches of the ophthalmic. Origin: Oculo- + nasal. Source: Websters Dictionary (01 Mar 1998) |
| oculopathy | : Eye disease. (12 Dec 1998) |
| oculopharyngeal dystrophy | A dominantly inherited form of chronic progressive external ophthalmoplegia usually presenting in middle life or old age with chronic ptosis and/or difficulty swallowing. Many sufferers have French-Canadian ancestry. (05 Mar 2000) |
| oculopharyngeal syndrome | <syndrome> A myopathic disorder with a slowly progressive blepharoptosis and dysphagia, beginning late in life; autosomal dominant inheritance; there is also a similar autosomal dominant trait. (05 Mar 2000) |
| oculoplethysmography | Indirect measurement of the haemodynamic significance of internal carotid artery stenosis or occlusion by demonstration of an ipsilateral delay in the arrival of ocular pressure transmitted from branches of the ophthalmic artery. Origin: oculo-+ G. Plethymos, increase, + graphe, to write (05 Mar 2000) |
| oculopneumoplethysmography | A method of bilateral measurement of ophthalmic artery pressure that reflects pressure and flow in the internal carotid artery. See: oculoplethysmography. (05 Mar 2000) |
| oculopupillary | Pertaining to the pupil of the eye. (05 Mar 2000) |
| oculosympathetic | Pertaining to the sympathetic pathway to the eye, damage to which produces Horner's syndrome. (05 Mar 2000) |
| oculovagal reflex | A decrease in pulse rate associated with traction on extraocular muscles or compression of the eyeball; especially sensitive in children; may produce asystolic cardiac arrest. Synonym: Aschner's phenomenon, Aschner's reflex, Aschner-Dagnini reflex, oculovagal reflex. (05 Mar 2000) |