- CN V Trigeminal - CN VI Abducens - CN VII Facial CN VIII Vestibulocochlear: arises in the inner ear and goes to the pons

- CN IX Glossopharyngeal - CN X Vagus - CN XI (spinal) Accessory) - CN XII Hypoglossal

Cranial nerve anatomy Flashcards by Allen Daniel

Cribriform plate

Olfactory nerve (I)
Meninges

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Optic Foramen

Optic Nerve (II) 
Opthalmic Artery

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Superior Orbital Fissure

N.b. all cranial nerves passing through here move the eyes

Occulomotor (III)
Trochlear (IV)
Ophthalmic branch of Trigeminal (V1)
Abducens (VI)
Ophthalmic veins

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Occulomotor

Originates: Mid-brain

Controls all extraocular muscles (except sup oblique and lateral rectus _ LR6SO4) and levator palpebrae superioris

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Occulomotor

Route

Emerges from brain
CN III passes btwn sup cerebellar and post cerebral arteries
pierces dura mater
runs along the lateral wall of the cavernous sinus

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Foramen Rotundum

Maxillary branch of the Trigeminal (V2)

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Foramen Ovale

Mandibular branch of the Trigeminal (V3)

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Foramen Spinosum

Middle Meningeal Artery

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Foramen Lacerum

Crossed by the Internal Carotid Artery

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Internal Acoustic Meatus

Facial nerve (VII)
Vestibulocochlear nerve (VII)
Labyrinthine artery

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Jugular Foramen

Glossopharyngeal nerve (IX)
Vagus nerve (X)
Accesory nerve (XI) 
Inferior petrosal sinus
Sigmoid sinus

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Hypoglossal foramen

Hypoglossal nerve (XII)

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Foramen Magnum

Midbrain: runs superiorly through the opening to join with the diencephalon
Vertebral Artery
XIsp
Meninges
CSF

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Cranial Nerves

I - OLFACTORY
II - OPTIC
III- OCCULOMOTOR
IV - TROCHLEAR
V - TRIGEMINAL
VI - ABDUCENS
VII - FACIAL
VIII - VESTIBULOCOCHLEAR
IX - GLOSSOPHARYNGEAL
X- VAGUS
XI - ACCESSORY
XII - HYPOGLOSSAL

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Cranial nerves 3,4 & 6

All move the eye
CN III - Occulomotor
CN IV - Trochlear
CN VI - Abducens

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Hypoglossal nerve CN XII

Moves the tongue

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Cranial nerve pneumonics

On Old Olympic Tower Tops A Finn And German Viewed Some Hops

To know if a CN is Sensory, Motor or Both:
Some Say Marry Money But My Brother Say Big Boobs Matter More

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Anterior Portion of Brain

CN I Olfactory
CN II Optic
CN III Occulomotor
CN IV Trochlear

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Pons

CN V Trigeminal
CN VI Abducens
CN VII Facial
CN VIII Vestibulocochlear: arises in the inner ear and goes to the pons

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Medulla Oblongata

CN IX Glossopharyngeal
CN X Vagus
CN XI (spinal) Accessory)
CN XII Hypoglossal

Difference between Optic Nerve & Optic Tract

Optic Nerve:
- Just nerve fibres from one side
Optic Tract:
- Fibres from both sides

Functional anatomy of cranial nerves

Chewing & swallowing (tasting and smelling)
Talking
Looking
Non-verbal communication (facial expressions)
Hearing

Sensory CN
(Afferent only)
* Sensory part lies in the periphery

Olfactory - CN I
Optic - CN II
Vestibulocochlear - CN VIII

Motor CN

Efferent only

Occulomotor - CN III
Trochlear - CN IV
Abducens - CN VI
(Spinal) Accessory - CN XI
Hypoglossal - CN XII

Mixed CN | Both Afferent and Efferent

Trigeminal - CN V Facial - CN VII Glossopharyngeal - CN IX Vagus - CN X

Cranial nerves that have an AUTONOMIC part They carry the "cranial" part of the craniosacral autonomic or parasympathetic outflow from the CNS - 4 of them

CN III - Occulomotor CN VII - Facial CN IX - Glossopharyngeal CN X - Vagus

CN Sensory Supply | - Cutaneous

Scalp Face Neck

CN Sensory Supply | - Non-cutaneous

``` Oral cavity (mucosa, tongue and teeth) Cornea Nasal Cavity & Paranasal sinuses Pharynx Larynx Tympanic Membrane ```

CN Sensory Supply | - Articular

TMJ - temperomandibular joint Cervical vertebrae Atlanto-occipital joint

CN Motor Supply

``` Muscles of facial expression Muscles of mastication Extra-ocular muscles Muscles of the tongue Muscles of the larynx and pharynx Cervical muscles ```

``` Cranial nerve(s) responsible for: - Smell ```

CN I Olfactory

Cranial nerve(s) responsible for: - Visual acuity - visual fields - ocular fundi

CN II Optic

``` Cranial nerve(s) responsible for: - Pupillary reactions ```

CN II Optic | CN III Oculomotor

``` Cranial nerve(s) responsible for: - Extra-ocular movements, including opening of the eyes ```

CN III Oculomotor CN IV Trochlear CN VI Abducens

Cranial nerve(s) responsible for: - Facial sensation - movements of the jaw - corneal reflexes

CN V Trigeminal

Cranial nerve(s) responsible for: - Facial movements - gustation (ant 2/3rds tongue)

CN VII Facial

Cranial nerve(s) responsible for: - Hearing - balance

CN VIII Vestibulocochlear

Cranial nerve(s) responsible for: - Swallowing - Elevation of the palate - Gag reflex - Gustation (post 1/3rd tongue)

CN IX Glossopharyngeal | CN X Vagus

Cranial nerve(s) responsible for: - Voice - Speech

CN V Trigeminal CN VII Facial CN X Vagus CN XII Hypoglossal

Cranial nerve(s) responsible for: - Shrugging the shoulders - Turning the head

CN XI Spinal Accessory

``` Cranial nerve(s) responsible for: - Movement and protrusion of the tongue ```

CN XII Hypoglossal

Abducens Nerve | - Passes through the SOF

Supplies Lateral Rectus Muscle | - allows you to move eyes laterally

Facial Nerve CN VII | - passes through the IAM

Comes out just below the ear and passes through the Parotid (salivary gland) Part of it carries sensation from the outside of the ear Branch of the nerve carries taste sensation from the front 2/3rds of the tongue splits into several branches Controls the muscles of facial expression Simulates the salivary glands to produce saliva

Glossopharyngeal Nerve (CN IX)

Sensory: to oropharynx Motor: only to stylopharyngeus muscle

Only cranial nerve to exit the brainstem on the posterior side

CN IV Trochlear

Largest CN

Trigeminal

Longest CN

CN X Vagus | - reaches from the Medulla to the digestive and urinary organs

CN's that carry sensory info about B.P. to the brain?

CN IX Glossopharyngeal | CN X Vagus

CN primarily responsible for pupillary constriction

CN III Occulomotor