Cranial Nerves Flashcards
What is the name of CN I?
Olfactory Nerve
What is the name of CN II?
Optic Nerve
What is the name of CN III?
Oculomotor
What is the name of CN IV?
Trochlear
What is the name of CN V?
Trigeminal (Ophthalmic, Maxillary & Mandibular)
What is the name of CN VI?
Abducens
What is the name of CN VII?
Facial
What is the name of CN VIII?
Vestibulocochlear
What is the name of CN IX?
Glossopharyngeal
What is the name of CN X?
Vagus
What is the name of CN XI?
Accessory
What is the name of CN XII?
Hypoglossal
What is the origin of CN I?
Cerebrum
What is the origin of CN II?
Cerebrum
What is the origin of CN III?
Midbrain-Pontine junction
What is the origin of CN IV?
Posterior side of Midbrain
What is the origin of CN V?
Pons
What is the origin of CN VI?
Pontine-Medulla junction
What is the origin of CN VII?
Pontine-Medulla junction
What is the origin of CN VIII?
Pontine-Medulla junction
What is the origin of CN IX?
Medulla Oblongata, posterior to the Olive
What is the origin of CN X?
Medulla Oblongata, posterior to the Olive
What is the origin of CN XI?
Medulla Oblongata, posterior to the Olive
What is the origin of CN XII?
Medulla Oblongata, anterior to the Olive
Where does the first cranial nerve exit the skull?
Cribiform Plate
Where does the second cranial nerve exit the skull?
Optic Canal
Where does the third cranial nerve exit the skull?
Superior Orbital Fissure
Where does the fourth cranial nerve exit the skull?
Superior Obrital Fissure
Where does the Ophthalmic nerve exit the skull?
Superior Obrital Fissure
Where does the Maxillary nerve exit the skull?
Foramen Rotundum
Where does the Mandibular nerve exit the skull?
Foramen Ovale
Where does the sixth cranial nerve exit the skull?
Superior Orbital Fissure
Where does the seventh cranial nerve exit the skull?
Internal Acoustic Meatus -> Stylomastoid Foramen
Where does the eighth cranial nerve exit the skull?
Internal Acoustic Meatus
Where does the ninth cranial nerve exit the skull?
Jugular Foramen
Where does the tenth cranial nerve exit the skull?
Jugular Foramen
Where does the eleventh cranial nerve exit the skull?
Jugular Foramen
Where does the twelth cranial nerve exit the skull?
Hypoglossal Canal
What is the function of CN I?
Smell
What is the function of CN II?
Vision
What is the function of CN III?
Control of 4 Extrinsic Eye muscles and Levator Palpebrae Superioris, as well as control of the Pupillary Sphincter.
What is the function of CN IV?
Control of the Superior Oblique muscle
What is the function of the Opthalmic nerve?
Sensation in the Scalp, Forehead and Nose
What is the function of CN VI?
Control of the lateral rectus muscle
What is the function of CN VII?
Sensation to part of the exterior ear, hard and soft palate & taste from anterior 2/3rds of the tongue.
Control of the muscles of facial expression, as well as the lacrimal, submandibular, and sublingual glands, as well as the mucous glands of the mouth and nose.
What is the function of CN VIII?
Hearing & Balance.
What is the function of CN IX?
Sensation from the posterior 1/3rd of the tongue (& taste too), external ear and middle ear cavity, as well as the carotid body & sinus.
Control of the Parotid gland and the Stylopharyngeus muscle.
What is the function of CN X?
Sensation from, external ear, larynx & pharynx, as well as the larynx, pharynx & abdominal viscera, taste from the epiglottis region of the tongue.
Control of the smooth muscles of the pharynx, larynx & most of the GI tract.
What is the function of CN XI?
Control of the trapezius and sternocleidomastoid, a few fibers run with CN X to the (Abdominal) viscera.
What is the function of CN XII?
Control of both the extrinsic and intrinsic tongue muscles (Except the palatoglossus).
