Cranial Nerves

Olfactory Fibers

Special Sensory Smell

Olfactory Exit

Cribiform Plate

Optic Fiber

Special Sensory Sight

Optic Exit

Optic Canal

Oculomotor Fiber

Somatic Motor and Parasympathetic

Oculomotor Innervation

4/6 eye muscles (Somatic)

Superior, Inferior, and middle rectus

inferior oblique

levator palpebrae superioris

Parasympathetic

constrictor pupillae

ciliary muscle

Oculomotor Exit

Superior Orbital Fissure

Trochlear Fibers

Somatic Motor

Trochlear Innervates

Superior Oblique

Trochlear Exit

Superior Orbital Fissure

Abducent Fibers

Somatic Motor

Abducent Innervates

lateral rectus (abducts eye)

Abducent Exit

Superior Orbital Fissure

Trigeminal V1 Fibers

Somatic Sensory

Trigeminal V1 Innervates

Upper face

scalp

eye

Trigeminal V1 Branches

Nasociliary

Frontal

Lacrimal

Trigeminal V1 Exit

Superior Orbital Fissure

Trigeminal V2 Fiber

Somatic Sensory

Trigeminal V2 Innervates

Midface

upper teeth

Trigeminal V2 Exit

Foramen Rotundum

Trigeminal V2 Branches

Infraorbital

Superior Alveolar- supplies upper teeth

Greater Palatine- Supplies lateral nasal wall and palatine

Trigeminal V3 Fibers

Somatic Motor and Somatic Sensory

Trigeminal V3 Innervates

Somatic Motor

• Muscles of Mastication

• Mylohyoid and Anterior Belly of Digastric

• Tensor Tympani and Tensor veli palatini

Somatic Sensory

• lower face, tongue and teeth

Trigeminal V3 Exit

Foramen Ovale

Trigeminal V3 Branches

Auriculotemporal

Lingual- anterior 2/3 of tongue

Facial Fiber

Somatic Motor

Somatic Sensory

Parasympathetic

Facial Innervates

Somatic Motor

• Facial Expression muscles

• stylohyoid

• posterior belly of diagrastic

Somatic Sensory

• Taste for Anterior 2/3 of tongue

Parasympathetics

• lacrimal for tears

• submandibular and sublingual for saliva

Facial Exit

Stylomastoid Foramen

Facial Branches

Temporal

Zygomatic

Buccal

Mandibular

Cervical

Posterior Auricular

Vestibulocochlear Fiber

Special Sensory hearing and balance

Vestibulocochlear Exit

No exit

Glossopharyngeal Fiber

Somatic Motor

Somatic Sensory

Visceral Sensory

Special Sensory

Parasympathetics

Glossopharyngeal Innervates

Somatic Motor- stylopharyngeus

Somatic Sensory- posterior 1/3 of tongue and pharynx

Visceral Sensory- Cartoid body (blood gas) and Cartoid sinus (pressure)

Special Sensory- taste posterior 1/3 of tongue

Parasympathetics- parotid gland

Glossopharyngeal Exit

Jugular Foramen

Vagus Fiber

Somatic Motor

Parasympathetics

Somatic Sensory

Vagus Innervates

Somatic Motor

• Skeletal muscles, pharynx and larynx

• levator veli palatini

• palatoglossus

Parasympathetics

Somatic Sensory

• larynx

Vagus Exit

Jugular Foramen

Accessory Fiber

Somatic Motor

Accessory Innervates

Sternocladomastoid

Trapezius

Accessory Exit

Jugular Foramen

Hypoglossal Fiber

Somatic Motor

Hypoglossal Innervates

• Genioglossus

• Styloglossus

• Hyoglossus

  • Intrinsic Tongue Muscles

Hypoglossal Exit

Hypoglossal Canal

Special sensory for posterior 1/3 of tongue

Glossopharyngeal

Somatic Sensory for posterior 1/3 of tongue

Glossopharyngeal

Special sensory for anterior 2/3 of tongue

Facial

Somatic sensory for anterior 2/3 of tongue

Facial