Cranial Nerves

Olfactory number

I

Optic number

II

Oculomotor number

III

Trochlear number

IV

Trigeminal number

V

Ophthalmic number

V1 (Trigeminal division)

Maxillary number

V2 (Trigeminal division)

Mandibular number

V3 (Trigeminal division)

Abducens number

VI

Facial nerve number

VII

Vestibulocochlear number

VIII

Glossopharyngeal number

IX

Vagus number

X

Spinal Accessory number

XI

Hypoglossal number

XII

Olfactory fiber type

Special sensory

Optic fiber type

Special sensory

Oculomotor fiber type

Somatic motor

Additional: Visceral motor

Trochlear fiber type

Somatic motor

Trigeminal fiber type

Somatic sensory & somatic motor

Abducens fiber type

Somatic motor

Facial nerve fiber type

Somatic motor

Additional: Visceral motor, somatic sensory, & special sensory

Vestibulocochlear fiber type

Special sensory

Glossopharyngeal fiber type

Special sensory

Additional: Somatic motor, visceral motor, & *visceral sensory*

Vagus fiber type

Visceral motor

Additional: *somatic motor*, somatic sensory, & special sensory

Spinal Accessory fiber type

Somatic motor

Hypoglossal fiber type

Somatic motor

Olfactory function

Olfaction (smell)

Optic function

Vision

Oculomotor function

Somatic motor - Eye movement (superior, inferior, & medial recti mm., inferior oblique m., and levator palpebrae superioris m.).

Additional visceral motor - Constriction of pupil (sphincter pupillae m.) and accommodation (ciliary m.)

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[Original: Eyeball movement (LR6 SO4 3) / Pupillary constriction in bright light (miosis) / Lens accommodation (focusing)]

Trochlear function

Movement of superior oblique muscle (downward/lateral movement - "cheater's muscle")

Trigeminal function

Sensation of most of head and teeth.

Additional somatic sensory - Touch for anterior ⅔ of tongue.

Additional somatic motor - Temporalis, masseter, medial & lateral pterygoids, anterior belly of digastric, tensor veli palatini, tensor tympani).

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[Original: Sensory to the face / Controls muscles of mastication (temporalis, masseter, medial and lateral pterygoids) / Corneal (blink) reflex.]

Ophthalmic function (Not updated using Dr. Burke's lecture)

Sensations from the forehead, eyelids, and nose.

Maxillary function (Not updated using Dr. Burke's lecture)

Sensations from lower eyelid, upper lip, and cheek.

Mandibular function (Not updated using Dr. Burke's lecture)

Controls mastication.

Abducens function

Abducts eye (lateral rectus m.)

Facial nerve function

Muscles of facial expression.

Additional somatic motor: Posterior belly of digastric, stylohyoid, stapedius mm.

Additional visceral motor: Lacrimal gland & salivary gland secretion.

Additional somatic sensory: Auricle and external acoustic meatus.

Additional special sensory: Taste for anterior ⅔ of tongue.

Vestibulocochlear function

Hearing / Balance equilibrium

Glossopharyngeal function

Taste from posterior ⅓ of tongue.

*Additional visceral sensory - Carotid sinus & body.*

Additional somatic motor - stylopharyngeus m.

Additional visceral motor- Parotid gland (saliva secretion).

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[Original: Innervates tongue and pharynx / Allows bitter taste from posterior 1/3 of tongue / Swallowing and gag reflex]

Vagus function

Smooth muscles & glands in thoracic & abdominal visceral organs.

*Additional Somatic motor - Pharynx, larynx*, & palate mm.

Additional somatic sensory - Sensation in lower pharynx, larynx, & trachea.

Additional special sensory - Taste on epiglottis.

Additional somatic sensory - Auricle & external acoustic meatus.

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[Original: Heart rate / Breathing / Digestive function (parasympathetic) / Sensory from viscera / Recurrent laryngeal nerve branches innervate larynx (voice box)]

Spinal Accessory function

Motor innervation to trapezius m. & sternocleidomastoid m.

Hypoglossal function

Tongue movement

[Original: Tongue movement / Swallowing & speech.]

Olfactory cranial exit

Cribriform foramina

[Original: Cribriform plate of ethmoid bone]

Optic cranial exit

Optic canal

Oculomotor cranial exit

Superior orbital fissure

Trochlear cranial exit

Superior orbital fissure

Ophthalmic cranial exit

Superior orbital fissure

Maxillary cranial exit

Foramen rotundum

Mandibular cranial exit

Foramen ovale

Abducens cranial exit

Superior orbital fissure

Facial nerve cranial exit

Internal acoustic meatus

[Original: Stylomastoid foramen]

Vestibulocochlear cranial exit

Internal acoustic meatus

Glossopharyngeal cranial exit

Jugular foramen

Vagus cranial exit

Jugular foramen

Spinal Accessory cranial exit

Jugular foramen

Hypoglossal cranial exit

Hypoglossal canal

Optic insertion

(Note: Old card)

Begins at retina → Enters optic canal → Converges at optic chiasm → Partial crossing over fibers to enter thalamus

Facial nerve condition

(Note: Old card)

Bell's palsy: unilateral facial paralysis.

Olfactory condition

(Note: Old card)

Anosmia: Lack of smell

Trigeminal condition

(Note: Old card)

Trigeminal neuralgia: Chronic face pain (suicide syndrome).