6/4/18

Front 1

Cranial Nerve 1

Back 1

I Olfactory Nerve

Front 2

Cranial Nerve 2

Back 2

II Optic Nerve

Front 3

Cranial Nerve 3

Back 3

III Oculomotor

Front 4

What is the optic nerve?

Back 4

Cranial Nerve 2, and it is purely sensory

Relays visual nerve impulses to occipital lobes

Front 5

Cranial Nerve 4

Back 5

IV Trochlear Nerve

Front 6

Cranial Nerve 5

Back 6

V Trigeminal

Front 7

Cranial Nerve 6

Back 7

VI Abducens

Front 8

Cranial Nerve 7

Back 8

VII Facial Nerve

Front 9

Cranial Nerve 8

Back 9

VIII Vestibulocochlear

Front 10

Cranial Nerve 9

Back 10

IX Glossopharyngeal Nerve

Front 11

Cranial Nerve 10

Back 11

X Vagus Nerve

Front 12

Cranial Nerve 11

Back 12

XI Accessory Nerve

Front 13

Cranial Nerve 12

Back 13

XII Hypoglossal

Front 14

Features of Olfactory Nerve

Back 14

Dendrites in mucosa over superior nasal conchae and nasal septum

Axons are chemoreceptors that connect to olfactory areas in cerebral cortex

Front 15

Optic nerve is a...

Back 15

Sensory nerve

Front 16

Features of Optic Nerve

Back 16

Conducts impulses from photoreceptors in retina to the occipital lobes

Front 17

Optic nerve goes through

Back 17

Optic foramen of sphenoid and forms the optic chiasm just above the pituitary gland

Front 18

Nerve fibers in the Optic nerve

Back 18

Medial half of each retina cross to the opposite, responsible for peripheral

Front 19

Nerve fibers of lateral half

Back 19

Remain on their sides

Front 20

Meninges in Optic Nerve

Back 20

They travel along the optic nerve which connects to the subarachnoid space

Under greater pressure leads to papilledema

Front 21

How are papilledema observed

Back 21

By funduscopic examination

Front 22

Occulomotor is

Back 22

A motor nerve that originates in the mesencephalon and passes to eye by superior orbital fissure

Front 23

What does Occulomotor do

Back 23

Extrinsic: moves the eye

Instrinsic: Constricts pupil, helps focus the lens

Front 24

Pressure on the Occulomotor

Back 24

Can lead to palsy on the same side of the injury

Front 25

Trochlear nerve is

Back 25

Both motor and sensory

Originates in Mesencephalon and passes through superior orbital fissure

Front 26

Branches of Trigeminal nerve

Back 26

Opthalmic - exits through superior orbital fissure

Maxillary - exits through Foramen Rotundum

Mandibular - exits through foramen ovale

Front 27

Photic Sneeze Reflex

Back 27

Close interatction between Optic nerve and Maxillary branch, leading to sneezing when exposed to light

Front 28

Motor functions of the Trigeminal

Back 28

Innervates Masseter, Temporalis, Medial/Lateral Pterygoids

Front 29

Trochlear Nerve...

Back 29

Controls downward and lateral movement

Front 30

Bitemporal Hemianopia

Back 30

Temporal or peripheral field of vision gone

Caused by pressure on optic chiasm

Front 31

Hypophysectomy

Back 31

Surgical removal of pituitary gland

Done to treat advanced breast and prostate cancer in past

Today for tumors in pituitary gland, these cause changes in vision

Front 32

VI Abducens

Back 32

Motor nerve, originates in pons, through superior orbital fissure

Moves eye laterally

Front 33

VII Facial Nerve

Back 33

Both sensory and motor

Origin in Pons

Front 34

Motor function of Facial Nerve

Back 34

Innervate facial Expression and stimulate salivary glands

Front 35

Salivary glands that the Facial Nerve stimulates

Back 35

Sublingual and submandibular

Front 36

Sensory function of Facial Nerve

Back 36

Impulses of taste from anterior 2/3 of the tongue and convey to gustatory areas

Front 37

Which nerve feels sensation in the face?

Back 37

Trigeminal V

Front 38

VIII Vestibulocochlear Nerve

Back 38

Purely Sensory

Vestibular Branch - Balance and Equilibrium, info to cerebellum

Cochlear Branch - Hearing, info to cerebral cortex and temporal lobe

Front 39

IX Glossopharyngeal

Back 39

Both Sense and Motor

Innervates poster 1/3 of tongue and muscle in throat

Front 40

Motor fibers of Glossopharyngeal

Back 40

Origin: medulla oblongata, through jugular foramen

Stimulate swallowing refelx adn secretion of saliva

Front 41

Parotid Canal

Back 41

Secretes saliva in the CN IX Glossopharyngeal

Front 42

Sensory Fibers of CN IX

Back 42

Chemoreceptors on back of tongue and sensors in carotid sinus

Enter cranium through jugular foramen

Go to Pons and taste area

Front 43

X Vagus Nerve

Back 43

Both sense and motor

Origin: medulla oblongata, through jugular foramen

Longest of cranial nerves and leaves the head and neck

Innervates visceral organs of the thoracic and abdominal cavities

Front 44

Motor of CN X

Back 44

Innervates pharynx (throat) and larynx (voice box)

Damage can lead to difficulty swallowing, hoarseness, monotone, or mutism

Front 45

Sensory of CN X

Back 45

External Auditory canal and eardrum

Pharynx

Larynx

Heart

Lungs

Esophagus

Abdominal Organs

Front 46

XI Accessory

Back 46

Motor Nerve from medulla oblongata and spinal cord

Goes through foramen magnum, joins medulla oblongata, leaves through jugular

Front 47

Roots of CN XI

Back 47

Cranial Root - Pharynx (gulp)

Spinal Root - Innervates Trapezius and sternocleiodmastoids (shrug)

Front 48

XII Hypoglossal

Back 48

Motor from Medulla Oblongata, exits through a canal in the skull

Travels to mandible and inferior surface of tongue

Innervates tongue

Damage - difficulty in speech and swallowing

Front 49

What type of nerve is Olfactory

Back 49

Sensory