1. The Cranial Nerves

2. I - Olfactory
II - Optic
III - Oculomotor
IV-Trochlear
V - Trigeminal
VI - Abducens
VII - Facial
VIII - Acoustic
IX - Glossopharyngeal
X - Vagus
XI - Accessory
XII - Hypoglossal
-cranial nerves – _____________
-considered part of the peripheral nervous system (PNS)
-olfactory & optic contain only sensory axons = __________________
-some are motor nerves – e.g. oculomotor, trochlear etc….
remaining are _________________– both motor and sensory axons

3. The Olfactory Nerve (I)
Carries sensory information
___________________________________________________
Branches enter skull through cribiform plate
Synapses within olfactory bulbs

4. The ____________(II) (sensory)
Carries visual information
enters skull through ________________
of the sphenoid
-right and left join at the
_____________(site of cross-over)
-continue to brain as optic tracts

5. The _________________ (III) [Motor]
Primary source of innervation for extra-ocular muscles
also carries postganglionic fibers that innervate the ciliary muscles (lens shape)
exits through superior orbital fissure
The ______________(IV) [Motor]
Smallest cranial nerve
Innervates superior oblique eye muscle
also provides proprioception info
exits through S.O.F
The _______________(VI) [Motor]
Innervates lateral rectus muscle of eye
exits through S.O.F

6. The Trigeminal Nerve (V) [Mixed]
____________ cranial nerve
__________ nerve
sensory – touch, pain & thermal
Ophthalmic branch
sensory – upper eyelid, eyeball
lacrimal glands, side of nose, forehead
and scalp
Maxillary branch
sensory – nose, palate, part
of pharynx, upper teeth, upper
lip and lower eyelid
_____________ branch
sensory – tongue, cheek,
lower teeth, skin over mandible
and side of head anterior to ear
-motor – muscles of chewing
-inferior alveolar nerve (branch of mandibular)
-often anesthetized in dental procedures – lower jaw
-numbs to mental nerve (branch of the IAN)
-superior alveolar nerve (branch of the maxillary)
-numbs the upper jaw

7. The Facial Nerve (VII) [Mixed]
____________
Controls muscles of scalp and face
Pressure sensations from face
____________sensations from tongue

8. Facial Nerve VII ________ branches supply muscles of facial expression
also carries preganglionic parasympathetic fibers to the lacrimal, sub-mandibular and sub-maxillary glands
_______branches serves a tiny patch of skin behind the ear
also provides taste information and sensation to the body of the tongue

9. The Vestibulocochlear Nerve (VIII) [_______]
__________________________
Monitors sense of balance, position and movement
_________________________
Monitors hearing

10. The Glossopharyngeal Nerve (IX) [________]
Innervates the tongue, pharyngeal muscles, stylopharyngeus m.
Controls __________
the efferent portion also sends pre/para fibers to the parotid gland (salivation)
also receives sensory info from taste receptors and general sensation from the tongue

11. The _____________(X) [Mixed]
Vital to autonomic control of visceral function
large efferent portion to the soft palate, pharynx and larynx
many other parasympathetic fibers to the organs of the gut, respiratory and CV systems
passes through the jugular foramen

12. The accessory nerve (XI)
Internal branch
________________________________________________________
External branch
The hypoglossal nerve (XII)
Voluntary motor control over _____
________________________________