Oculomotor nerve
The oculomotor nerve is the third cranial nerve. (The cranial nerves emerge from or enter the cranium, the skull, as opposed to the spinal nerves which emerge from the vertebral column). The oculomotor nerve is responsible for the nerve supply to muscles about the eye: {{}}The upper eyelid muscle which raises the eyelid; The extraocular muscle which moves the eye inward; and The pupillary muscle which constricts the pupil. Paralysis of the oculomotor nerve results in drooping eyelid (ptosis), deviation of the eyeball outward (and therefore double vision) and a dilated (wide-open) pupil.

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oculomotor nerve n either nerve of the third pair of cranial nerves that are motor nerves with some associated autonomic fibers, arise from the midbrain, supply muscles of the eye except the superior oblique and the lateral rectus with motor fibers, and supply the ciliary body and iris with autonomic fibers by way of the ciliary ganglion called also third cranial nerve

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the third cranial nerves (III), which is composed of motor fibres distributed to muscles in and around the eye. Fibres of the parasympathetic system are responsible for altering the size of the pupil and the lens of the eye. Fibres outside the eye run to the upper eyelid and to muscles that turn the eyeball in different directions.

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nervus oculomotorius.

Medical dictionary. 2011.

Look at other dictionaries:

  • Oculomotor nerve — Nerve: Oculomotor nerve Nerves of the orbit. Seen from above …   Wikipedia

  • oculomotor nerve — noun supplies extrinsic muscles of the eye • Syn: ↑oculomotor, ↑nervus oculomotorius, ↑third cranial nerve • Hypernyms: ↑cranial nerve …   Useful english dictionary

  • oculomotor nerve — the third cranial nerve (III), which is composed of motor fibres distributed to muscles in and around the eye. Fibres of the parasympathetic system are responsible for altering the size of the pupil and the lens of the eye. Fibres outside the eye …   The new mediacal dictionary

  • oculomotor nerve — oculomo′tor nerve n. anat. either one of the third pair of cranial nerves, which innervate most of the muscles of the eyeball • Etymology: 1880–85 …   From formal English to slang

  • oculomotor nerve — noun Date: 1881 either of the pair of chiefly motor nerves that comprise the third pair of cranial nerves, arise from the midbrain, and supply four muscles of the eye …   New Collegiate Dictionary

  • oculomotor nerve — Anat. either one of the third pair of cranial nerves, consisting chiefly of motor fibers that innervate most of the muscles of the eyeball. See diag. under brain. [1880 85] * * * …   Universalium

  • oculomotor nerve — noun The third of twelve paired cranial nerves, which controls most of the eyes movements and constriction of the pupil and maintains an open eyelid …   Wiktionary

  • oculomotor nerve — /ɒkjəloʊˈmoʊtə nɜv/ (say okyuhloh mohtuh nerv) noun either of the two cranial nerves which supply most of the muscles of the eyeball …   Australian English dictionary

  • Oculomotor nerve palsy — Classification and external resources Eye nerves diagram ICD 10 H49 …   Wikipedia

  • Inferior branch of oculomotor nerve — Infobox Nerve Name = PAGENAME Latin = ramus inferior nervi oculomotorii GraySubject = 198 GrayPage = 884 Caption = Plan of oculomotor nerve. (Inferior branch visible at bottom.) Caption2 = Innervates = Inferior rectus, Medial rectus, Inferior… …   Wikipedia

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