GROSS ANATOMY

Detailed explanation-1: -The oculomotor nerve is the third cranial nerve (CN III). It allows movement of the eye muscles, constriction of the pupil, focusing the eyes and the position of the upper eyelid. Cranial nerve III works with other cranial nerves to control eye movements and support sensory functioning.

Detailed explanation-2: -Cranial nerves III (CNIII) (oculomotor), IV (trochlear), and VI (abducens) control the position of the eyeballs; CNIII influences the position of the eyelids and the size of the pupils.

Detailed explanation-3: -The oculomotor nerve controls important muscles in your eye. It allows you to look up and down, fixate your gaze on a moving object, and perform other important eye movements. Interesting facts about the oculomotor nerve: Each cranial nerve splits into two branches.

Detailed explanation-4: -The fibers enter the orbit with CNIII nerve fibers and ultimately synapse at the cilliary ganglion. Sympathetic innervation leads to pupillary dilation. Dilation is controlled by the dilator pupillae, a group of muscles in the peripheral 2/3 of the iris.

Detailed explanation-5: -Sympathetic Innervation. Parasympathetic Innervation. Ophthalmic Nerve. Maxillary Nerve. Mandibular Nerve.