Head And Neck Cranial Nerve Components

Front 1

what are the components of CN I?

Back 1

Olfactory

SVA (SSA?)

Front 2

What are the components of CN II?

Back 2

Optic

SSA (S for sight)

Front 3

What are the components of CN III?

Back 3

Occulomotor

GSE (for extraocular muscles)
GSA (for extraoccular muscle proprioceptors)
GVE (for intraocular muscles which originate from Branchial arch

Front 4

What are the components of CN IV?

Back 4

Trochlear

GSE (superior oblique innervation)
GSA (SO proprioceptor)

Front 5

What are the components of CN V?

Back 5

Trigeminal

GSA (general sensation for touch, pain, heat, etc. skin so somatic)

SVE (motor of masticatory muscles which arise from branchial cleft) (only V3 has this)

Front 6

What are the components of CN VI?

Back 6

Abducent

GSE
GSA
innervation and proprioception of lateral Rectus extraoccular muscle

Front 7

What are the components os CN VII?

Back 7

Facial

SVE (motor for facial muscles which arise out of branchial cleft 2)
SVA (taste for front 2/3 of tongue)
GVE (glandular innervation)
GSA (proprioception of facial muscles)

Front 8

What are the components of CN VIII?

Back 8

Vestibulocochlear

SSA (special hearing and equilibrium somatic bc ear canal is not in branchial arch, its from a pouch and groove)

Front 9

What are the components of CN IX?

Back 9

Glossopharyngeal

SVE (innervation of stylopharyngeus)
SVA (taste to post 2/3 of tongue)
GVE (parotid and salivary glands)
GSA (pain and temp sensation to post 2/3 tongue and pharynx)
GVA (chemo and baro-reception from carotid bodies)

Front 10

What are the components of CN X?

Back 10

Vagus

SVE (motor innervation of branchiomeric muscles in pharynx)
GVE (minor salivary glands, GI and bronchiolar mucosa and heart)
SVA (scattered taste buds on epiglottis)
GVA (chemo and baroreceptors from carotid and aortic bodies)
GSA (pain and temp from lower pharynx and tympanic membrane via auricular branch)

Front 11

What are the components of CN XI?

Back 11

Accessory

SVE? (maybe branchiometric muscles of lower pharynx)
GSE (innervation of trapezius and sternocleidomastoid)
GSA (proprioception of trap and sternoc...)

Front 12

What are the components of CN XII?

Back 12

Hypoglossal

GSE (innervation of intrinsic and extrinsic muscles of tongue)
GSA (proprioception from muscles)

Front 13

What are the components of chorda tympani?

What does it join with and what are the components of that nerve when it does?

Back 13

Chorda = GVE (glands) and SVA (taste of ant. 2/3)

Joins with lingual branch of V3 which has GSA (general sensation for ant. 2/3rd of tongue)

Front 14

exit for CN I?

Back 14

olfactory foramina in ethmoid cribriform plate

Front 15

exit for CN II?

Back 15

optic canal of sphenoid

Front 16

exit for CN III?

Back 16

Superior orbital fissure of sphenoid

Front 17

exit for CN IV?

Back 17

SOF of sphenoid

Front 18

exit for CN V1?

Back 18

superior orbital Fissure of sphenoid

Front 19

exit for CN V2?

Back 19

Foramen Rotundum

Front 20

exit for CN V3?

Back 20

Foramen Ovale

Front 21

exit for CN VI?

Back 21

superior orbital fissure of Sphenoid

Front 22

exit(s) for CN VII?

Back 22

Stylomastoid foramen
Internal auditory meatus
Chorda tympani - petrotympanic (squamotympanic) fissure

Front 23

exit for CN VIII?

Back 23

Internal auditory meatus

Front 24

exit for CN IX?

Back 24

Jugular foramen

Front 25

Exit for CN X?

Back 25

Jugular foramen

Front 26

Exit for CN XI? entrance?

Back 26

Jugular foramen
entrance - spinal accessory enters the cranial vault through the foramen magnum

Front 27

Exit for CN XII?

Back 27

hypoglossal canal
(next to foramen magnum)

Front 28

What muscles are found in the infratemporal fossa?

Back 28

Lateral pterygoid
Medial pterygoid
Temporalis (lower part)

Front 29

what nerves are found in Infratemporal fossa?

Back 29

branches of V3
Chorda tympani (branch of VII)

Front 30

what arteries are found in Infratemporal fossa?

Back 30

branches of Maxillary artery

Front 31

what veins are found in infratemporal fossa?

Back 31

Maxillary vein
Pterygoid venous plexus

Front 32

what does the Middle meningeal artery supply?

Back 32

dorsal surface of anterior CF and Middle CF

Front 33

how many branches does the maxillary artery have? what are they split into?

Back 33

15
split into thirds

Front 34

what are the five branches of the first third of maxillary artery?
what is another name for the first third?

Back 34

Deep Auricular a
Anterior tympanic a
Middle Meningeal a
Accessory Meningeal a
Inferior alveolar a

another name = mandibular third

Front 35

Where does the Deep auricular artery go from the infratemporal fossa?

Back 35

Internal auditory meatus

Front 36

where does the anterior tympanic artery go from the infratemporal fossa?

Back 36

petrotympanic fissure
(runs by the chorda tympani there)

Front 37

where does the Middle meningeal artery go from the Infratemporal fossa?

Back 37

Foramen spinosum

Front 38

where does the accessory meningeal artery go from the Infratemporal fossa?

Back 38

foramen ovale (Ama is only sometimes found)

Front 39

where does the inferior alveolar artery go from the infratemporal fossa?

Back 39

Mandibular foramen (inferior alveolar foramen) into the mandibular canal

Front 40

what are the five branches of the second third of the maxillary artery?
what is another name for the 2nd third?

Back 40

Posterior deep temporal
Pterygoid arteries
Anterior deep temporal
Masseteric
Buccal

another name = pterygoid third

Front 41

which arteries of the pterygoid portion of the maxillary artery can be seen if you pull temporalis up?
which cannot usually be seen?

Back 41

Posterior deep temporal and anterior deep temporal can be seen

Pterygoid arteries usually cannot be seen

Front 42

What are the five branches of the last third of the maxillary artery?
What is another name for this third? why?

Back 42

Posterior superior alveolar
pterygoid (vidian)
Sphenopalatine
Descending palatine
Infraorbital

Two other names = terminal or pterygopalatine portion because it's found in the pterygopalatine fossa

Front 43

what are the branches off the sphenopalatine artery?

Back 43

Posterior nasal branches
Nasopalatine branches

Front 44

where does the infraorbital artery exit the cranial vault?

Back 44

infraorbital foramen

Front 45

where does the sphenopalatine branch of maxillary artery leave from? to where? through where? what are its two branches?

Back 45

leaves from pterygopalatine fossa
Goes to Nasal canal
Through Sphenopalatine foramen
Two branches are posterior nasals and nasopalatine branches

Front 46

what is the order of the branches of the 1st third of maxillary artery?

Back 46

Deep temporal
Anterior tympanic
Middle Meningeal
Accessory meningeal
Inferior alveolar

Front 47

what is teh order of the branches of the 2nd third of maxillary artery?

Back 47

Masseteric
Posterior Deep temporal
pterygoid arteries
Anterior Deep temporal
Buccal

Front 48

what is the branch off the pterygoid (vidian) artery (artery of the pterygoid canal?

Back 48

pharyngeal artery

Front 49

what does the posterior superior alveolar artery supply up to?

Back 49

from the back of maxilla to 2nd molar

Front 50

what does the pterygoid venous plexus drain into?

Back 50

Maxillary veins (very short)

Front 51

What does the maxillary veins drain into?

Back 51

retromandibular vein

Front 52

What two veins come together to make up the common facial vein?

Back 52

facial vein
retromandibular vein

Front 53

what does the common facial vein drain into?

Back 53

Internal jugular

Front 54

what vein drains into the retromandibular vein from the back of the head?

Back 54

occipital vein

Front 55

where can you easily locate the internal jugular vein?

Back 55

under the sternocleidomastoid

Front 56

other than the internal jugular, where else can blood from the retromandibular vein drain?

Back 56

external jugular (only sometimes and usually not all of the drainage)

Front 57

what is the only branch off the inferior alveolar n?
what is the inferior alveolar n a branch of?

Back 57

mylohyoid n.
branch of V3 (mandibular)

Front 58

what are the muscles that the mylohyoid n. innervates? what type of fibers?

Back 58

Mylohyoid
Anterior belly of digastricus
SVE (bc V3 is SVE and GSA)

Front 59

Name all 8 branches of V3.

Back 59

Auriculotemporal
Inferior Alveolar (w/ mylohyoid)
Lingual
Long buccal
muscular branches
Temporal
Masseteric
Pterygoid

Front 60

what travels with the auriculotemporal N?
What is the auriculotemporal a branch of?

Back 60

GVE postganglionic fibers from otic ganglion (CN IX) to the parotid gland
Auriculotemporal N. is a branch of V3

Front 61

what forms a "buttonhole" around the middle meningeal artery?

Back 61

the auriculotemporal N

Front 62

what type of fibers does the Mylohyoid nerve carry?

Back 62

SVE (because they originated in branchial arch
GSA (sensory)

Front 63

what branch of CN IX goes to the otic ganglion?

Back 63

lesser superficial petrosal nerve

Front 64

what are the muscles innervated by the Mandibular N. (V3)?

Back 64

4 muscles of mastication - temporalis masseter lateral and medial pterygoid
Anterior belly of digastricus
Mylohyoid
Tensor palati
Tensor tympani

Front 65

what two maxillary n. branches go through the inferior orbital fissure from the pterygopalatine fossa?

Back 65

1. Infraorbital n.
2. Zygomatic n.

Front 66

what nerve provides innervation of the carotid bodies in the carotid sinus?
what type of nerve fibers are these?

Back 66

IX (Glossopharyngeal)

GVA

Front 67

what nerve provides innervation of the walls of the carotid sinus?
what type of nerve fibers are these?

Back 67

X (vagus) -also innervates walls of gi tract, esophagus, lungs, and hearts

GVA

Front 68

which bone is attached to the tympanic membrane?

Back 68

Malleus (Malleus = Membrane)

Front 69

where does the chorda tympani go through in skull? from where, to where?

Back 69

from middle ear canal

through the petrotympanic fissure

to the infratemporal fossa

Front 70

what are teh two portions (anterior and posterior) of the brain stem and spinal cord? what splits them? which is afferent? which is efferent?

Back 70

Anterior = Basal = Efferent
Posterior = Alar = Afferent
split by the sulcus limitans

Front 71

which nerve fiber type innervates the muscles that originate from the branchial arches?

Back 71

SVE

BA I = CN V
BA 2 = CN VII
BA 3 = CN IX
BA 4 and 6 = CN X and XI