NERVUS OCULOMOTORIUS Meaning and
Definition
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The nervus oculomotorius, also known as the oculomotor nerve, is one of the 12 cranial nerves originating from the brainstem. It is the third cranial nerve and is responsible for the motor innervation of the majority of the muscles controlling eye movements. The nervus oculomotorius plays a crucial role in controlling and coordinating the movements of the eyeballs and contributes to the pupillary constriction and lens accommodation reflexes.
The nervus oculomotorius emerges from the midbrain, specifically from the oculomotor nucleus located in the vicinity of the cerebral aqueduct. As it exits the brainstem, it travels through the superior orbital fissure and into the orbit, where it branches into multiple smaller nerves. These branches innervate the superior rectus muscle, which is responsible for elevating the eye, the inferior rectus muscle, which is responsible for depressing the eye, the medial rectus muscle, which is responsible for adducting the eye towards the nose, and the inferior oblique muscle, which is responsible for intorting the eye. Additionally, the nervus oculomotorius contributes to controlling the intrinsic muscles of the eye, namely the sphincter pupillae muscle, which constricts the pupil, and the ciliary muscle, which controls the shape of the lens for accommodation.
Damage or dysfunction to the nervus oculomotorius can result in various ocular disturbances, including ptosis (drooping of the eyelid), diplopia (double vision), strabismus (misalignment of the eyes), and pupillary abnormalities.
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Oculomotor nerve, motor oculi, 3d cranial nerve; supplies all the extrinsic muscles of the eye, except the external rectus and superior oblique, and also the levator palpebrae superioris, the ciliary muscle, and the sphincter iridis; its origin is the floor of the aquaeductus cerebri, it emerges from the brain in the oculomotor sulcus, pierces the dura mater to the side of the posterior clinoid process, passes through the cavernous sinus and enters the orbit through the superior orbital (sphenoidal) fissure.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.
Common Misspellings for NERVUS OCULOMOTORIUS
- bervus oculomotorius
- mervus oculomotorius
- jervus oculomotorius
- hervus oculomotorius
- nwrvus oculomotorius
- nsrvus oculomotorius
- ndrvus oculomotorius
- nrrvus oculomotorius
- n4rvus oculomotorius
- n3rvus oculomotorius
- neevus oculomotorius
- nedvus oculomotorius
- nefvus oculomotorius
- netvus oculomotorius
- ne5vus oculomotorius
- ne4vus oculomotorius
- nercus oculomotorius
- nerbus oculomotorius
- nergus oculomotorius
Etymology of NERVUS OCULOMOTORIUS
The word "Nervus Oculomotorius" is derived from Latin and Greek roots. The term "nervus" means "nerve" in Latin, while "oculomotorius" is a compound word formed by combining "oculo" (meaning "eye" in Latin) and "motorius" (meaning "motor" or "mover" in Latin).
The Latin word "oculomotorius" can be further traced back to the Greek roots "okulo-" (meaning "eye") and "motorios" (meaning "pertaining to motion" or "moving"). The word "motorios" is derived from the Greek word "moveo", meaning "to move".
Therefore, "Nervus Oculomotorius" can be translated to mean "Oculomotor Nerve" or "Nerve of Eye Movement" in English.
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