Cranial nerves Flashcards
CN I
olfactory nerve
cribriform plate of ethmoid bone
sensory
smell
CN II
optic nerve
optic canal/ foramen
sensory
see
mneumonic for CN function
Some Say Marry Money But My Brother Says Big Butts Matter More
CN III
oculomotor nerve
superior orbital fissure
motor
moves the eye
mneumonic for CN
Oh Oh Oh To Touch And Feel Very Good Velvet Such/Ah Heaven
CN IV
trochlear nerve
superior orbital fissure
motor
superior oblique muscle of eye
CN V1
ophthalmic division of trigeminal nerve
superior orbital fissure and then supraorbital notch/ foramen
both
lacrimal gland, internal eye, skin around forehead eye
CN V2
maxillary division of trigeminal nerve
foramen rotundum and then infraorbital foramen
sensory
lower eye, lower nose, upper lips
CN V3
mandibular division of trigeminal nerve
foramen ovale and then mental foramen
motor anterior part to muscles of mastication except long buccal
sensory posterior part to scalp (auriculotemporal), anterior 2/3 (lingual), lower teeth (inferior alveolar) except nerve to mylohyoid
CN V
trigeminal nerve
both
sensory to muscles of facial expression
motor to muscles of mastication
CN VI
abducens nerve
superior orbital fissure
motor
lateral rectus muscle
CN VII
facial nerve stylomastoid foramen both (sensory to 2/3 anterior tongue, motor to muscles of facial expression) 1 posterior branch - posterior auricular nerve 5 anterior branches - The Zebra Bit My Cat - temporal - zygomatic - buccal - marginal mandibular - cervical
CN VIII
vestibulocochlear nerve
internal acoustic meatus
both
hearing and balance
CN IX
glossopharyngeal nerve
jugular foramen
both
sensory and taste to posterior 1/3 tongue
CN X
vagus nerve
jugular foramen
motor
most of soft palate, pharynx, larynx, oesophagus, stomach
CN XI
spinal accessory nerve
foramen magnum in, U bend, out of jugular foramen
motor
trapezius, sternocleidomastoid
CN XII
hypoglossal nerve
hypoglossal canal
all extrinsic and intrinsic muscles of tongue except palatoglossus
geniohyoid, thyrohyoid and sternothyroid (C1 hitchhikes)
ansa cervicalis
C1-C3
superior root (C1) innervates infrahyoid muscles and hitchhikes CN XII
inferior root (C2-3)
superior and inferior roots join below bifurcation of common carotid artery
cervical plexus
C1-4
emerges from posterior border of SCM
branches are cutaneous nerves
brachial plexus
C5-8-T1
emerges between middle and anterior scalene muscles
upper limbs
parasympathetic CN
CN III
CN VII
CN IX
CN X
