Lint: oculomotor-nerve

"The oculomotor nerve is the third cranial nerve (TA: nervus oculomotorius or nervus cranialis III). It is a mixed nerve containing motor, parasympathetic and sympathetic fibres."

"Inside the orbit, the smaller superior division passes superiorly to innervate the superior rectus, levator palpebrae superioris and superior tarsal muscles. The larger inferior division further divides into three branches: one passing inferior to the optic nerve as it travels to the medial side of the orbit to innervate the medial rectus muscle; a second descends to innervate the inferior rectus; and, the third runs anteriorly along the floor of the orbit to innervate the inferior oblique muscle. As the third branch descends, it sends a branch to the ciliary ganglion. This is the parasympathetic root to the ciliary ganglion and carries preganglionic parasympathetic fibres; these will synapse in the ciliary ganglion with postganglionic parasympathetic fibres that are distributed to the eyeball through the short ciliary nerves, which innervate the sphincter pupillae and ciliary muscles. These parasympathetic fibres in the oculomotor nerve are responsible for pupillary constriction and accommodation of the lens for near vision. Thus, these fibres form the efferent component of the pupillary reflex arc. Sympathetic fibres within the oculomotor nerve innervate the superior tarsal muscle, within the levator palpebrae.¹"

"Inside the orbit, the smaller superior division passes superiorly to innervate the superior rectus, levator palpebrae superioris and superior tarsal muscles. The larger inferior division further divides into three branches: one passing inferior to the optic nerve as it travels to the medial side of the orbit to innervate the medial rectus muscle; a second descends to innervate the inferior rectus; and, the third runs anteriorly along the floor of the orbit to innervate the inferior oblique muscle. As the third branch descends, it sends a branch to the ciliary ganglion. This is the parasympathetic root to the ciliary ganglion and carries preganglionic parasympathetic fibres; these will synapse in the ciliary ganglion with postganglionic parasympathetic fibres that are distributed to the eyeball through the short ciliary nerves, which innervate the sphincter pupillae and ciliary muscles. These parasympathetic fibres in the oculomotor nerve are responsible for pupillary constriction and accommodation of the lens for near vision. Thus, these fibres form the efferent component of the pupillary reflex arc. Sympathetic fibres within the oculomotor nerve innervate the superior tarsal muscle, within the levator palpebrae.¹"

"Inside the orbit, the smaller superior division passes superiorly to innervate the superior rectus, levator palpebrae superioris and superior tarsal muscles. The larger inferior division further divides into three branches: one passing inferior to the optic nerve as it travels to the medial side of the orbit to innervate the medial rectus muscle; a second descends to innervate the inferior rectus; and, the third runs anteriorly along the floor of the orbit to innervate the inferior oblique muscle. As the third branch descends, it sends a branch to the ciliary ganglion. This is the parasympathetic root to the ciliary ganglion and carries preganglionic parasympathetic fibres; these will synapse in the ciliary ganglion with postganglionic parasympathetic fibres that are distributed to the eyeball through the short ciliary nerves, which innervate the sphincter pupillae and ciliary muscles. These parasympathetic fibres in the oculomotor nerve are responsible for pupillary constriction and accommodation of the lens for near vision. Thus, these fibres form the efferent component of the pupillary reflex arc. Sympathetic fibres within the oculomotor nerve innervate the superior tarsal muscle, within the levator palpebrae.¹"

"Oculomotor nerve palsy - most commonly caused by vascular disorders (36%); the most common symptom is diplopia.²"