Nerve06/cranial nerves/03oculomotor

POINT!

The oculomotor nerve (number III cranial nerve) functions as the nerve for eyeball movement, pupillary sphincter, ciliary muscles (focusing) and levator palpebrae superioris

The trochlear nerve (number IV cranial nerve) functions as the nerve for superior oblique muscle and the abducens nerve (number VI cranial nerve) functions as the nerve for eyeball abduction. The oculomotor nerve (number III cranial nerve) functions as nerve for all other muscles that move the eyeball.

The oculomotor nerve (number III cranial nerve) also functions as the nerve for ciliary muscles (focusing) and levator palpebrae superioris, which opens the eyelid. The facial nerve (number VII cranial nerve) functions as the nerve for muscles of facial expression including orbicularis oculi muscle, which closes the eyelid.

The oculomotor nerve (number III cranial nerve) functions as the nerve for pupillary sphincter, which decreases the size of the pupil. Meanwhile, the nerve for the pupillary dilator, which increases the size of the pupil is from the cervical sympathetic ganglia.

Challenge Quiz

1.

The oculomotor nerve is the number I II III IV V VI VII VIII IX X XI XII  正解! cranial nerve.

2.

The oculomotor nerve functions as the nerve for oculomotor muscles other than lateral rectus and superior oblique levator palpebrae superioris ciliary muscles (focusing) smell superior oblique muscle lateral rectus muscles of facial expression including orbicularis oculi muscle pupillary sphincter pupillary dilator  正解!.