Cranial Nerves ALL

Question 1

CN1

Answer 1

Olfactory n. Cribiform plate SVA (olfactory nasal mucosa=smell)

Question 2

CN2

Answer 2

Optic n. Optic canal SSA (rods and cones of retina=vision) *HUGE*

Question 3

CN3

Answer 3

Oculomotor n. Superior orbital fissure *LR6SO43 GVE (sphincter pupillae + ciliary mm.) *via ciliary ganglion *parasymp, pupil small + lens fat GSE - superior rectus m. - medical rectus m. - inferior rectus m. - inferior oblique m. - levator palpebrae m.

Question 4

Superior orbital fissure

Answer 4

III IV V1 VI

Question 5

Parasympathetic function (GVE)

Answer 5

3, 7, 9, 10

Question 6

CN4

Answer 6

Trochlear N. Superior orbital fissure GSE (superior oblique m. = depressed + aBducts) *LR6SO43 *trochlea = little piece of CT that n. hooks onto (means pulley in latin)

Question 7

LR6SO43

Answer 7

Extraocular muscles (there are 7) 6 = abducens n. Lateral rectus m. - aBducts 4 = trochlear n. Superior oblique m. - depresses, aBducts 3 = oculomotor n. Superior rectus m. - elevates, aDducts Medial rectus m. - aDducts Inferior rectus m - depresses, aDducts Inferior oblique m. - elevates, aBducts Levator palpebrae m. - elevates eyelid

Question 8

CN5

Answer 8

Trigeminal n. V1 = Opthalmic n. (superior orbital fissure / supraorbital foramen) GSA - skin of upper face (orbit and above) *V1 = NFL (nasociliary, frontal, lacrimal) V2 = Maxillary n. (rotundum / infraorbital foramen) GSA - skin of mid face, upper teeth, nasal + palatal mucosa V3 = Mandibular n. (ovale / mental foramen) GSA - skin of lower face, jaw, floor of mouth, mucosa of anterior 2/3 of tongue, lower teeth, gums, ear pinna and canal SVE - mm. of mastication, anterior belly of digastric, tensor tympani, tensor palatini, mylohyoid m.

Question 9

SROS

Answer 9

standing room only stupid ***ALL OF THESE ARE IN SPHENOID BONE*** Superior orbital fissure - V1 Foramen rotundum - V2 Foramen ovale - V3 Foramen spinosum - middle meningeal artery

Question 10

CN6

Answer 10

Abducens n. Superior orbital fissure GSE - motor to lateral rectus m.

Question 11

To see To focus When looking at bright lights To open your eyes To FORCE your eyes closed

Answer 11

To see = CN II To focus = CN III (ciliary mm.) Bright lights = CN III (sphincter pupillae) To open = CN III (levator palpebrae) FORCE closed = CN VII (orbicularis occuli m.)

Question 12

CN7

Answer 12

Facial n. Internal acoustic meatus (exits stylomastoid foramen) GVA - deep sensory of soft palata SVA - taste ant 2/3 of tongue (corda tympani) GSA - sens. ear pinna GVE - submandib, subling, lacrimal, nasal GLANDS *para tears, snot, spit SVE - mm. of facial expression, pos belly digastric m., stylohyoid m., stapedius m. SVE terminal branches = TZBMC

Question 13

Internal acoustic/auditory meatus

Answer 13

*in petrous portion of temporal bone - one of densest/strongest parts of skull* CN 7 - facial CN 8 - auditory/acoustic

Question 14

Terminal motor (SVE) branches of CN7

Answer 14

Temporal Zygomatic Buccal Mandibular Cervical

Question 15

CN8

Answer 15

Auditory n. Internal auditory meatus SSA - hearing: cochlear n. (organ of Corti in cochlear ducts) - balance: vestibular n. (semicircular canals, utricle, saccule) **AFFERENT - getting information into the brain

Question 16

Jugular foramen

Answer 16

CN 9, 10, 11

Question 17

CN9

Answer 17

Glossopharyngeal n. Jugular foramen GVA - deep sensation to posterior tongue, soft palate, pharynx, mucosa of tympanic cavity, pos auditory tube, carotid body + sinus *Raging ear infection) SVA - taste pos 1/3 tongue + adj. pharynx GSA - sensory ear pinna + canal GVE - parotid gland (**GLOAP**) SVE - stylopharyngeus m. *crosses like a barber pole

Question 18

CN10

Answer 18

Vagus n. Jugular foramen GVA - sensation from pharynx, esophagus, trachea, larynx, abdominal viscera *swallow glass* SVA - taste epiglottis *taste in vegas before you choke* GSA - sensation ear pinna, canal, + tympanic membrane GVE - thoracic + abdominal viscera *slow heart, speeds up digestion SVE - mm. of pharynx, larynx (ALL VOCALIZATION), levator palatini m, cricothyroid m., palatoglossus m.

Question 19

CN11

Answer 19

Accessory n. Foramen magnum/ jugular foramen *starts in spinal cord - goes to brain - leaves brain SVE - SCM and trapezius m.

Question 20

CN12

Answer 20

Hypoglossal n. Hypoglossal canal GSE - intrinsic + extrinsic mm. of tongue (EXCEPT palatoglossus) *lick your eyeball *sits on TOP/superficial to hyoglossus m.

Question 21

SVE

Answer 21

Pharyngeal mm. 5,7,9,10,11

Question 22

GSE

Answer 22

lick your eyeball 3,4,6,12

Question 23

SVA

Answer 23

taste + smell 1,7,9,10

Question 24

SSA

Answer 24

vision + hearing 2,8

Question 25

GVE

Answer 25

parasympathetic / secretomotor 3,7,9,10

Question 26

GVA

Answer 26

deep sensation 7,9,10

Question 27

GSA

Answer 27

superficial sensation 5,7,9,10

Question 28

sensation of ear pinna

Answer 28

CN 5, 7, 9, 10

Question 29

Answer 29

optic n.

Question 30

Answer 30

oculomotor n.

Question 31

Answer 31

jugular foramen with IX, X, XI

Question 32

Answer 32

spinal accessory n.

Question 33

Answer 33

hypoglossal n.

Question 34

Answer 34

internal acoustic meatus

Question 35

Answer 35

abducens n.

Question 36

Answer 36

internal carotid a.

Question 37

Answer 37

internal carotid a.

Question 38

Answer 38

internal acoustic m.

Question 39

Answer 39

spinal accesory n.

Question 40

Answer 40

hypoglossal n.

Question 41

Answer 41

trigeminal n.

Question 42

Answer 42

middle meningeal a.

Question 43

Answer 43

CN V3 - mandibular division

Question 44

Answer 44

maxillary division of V (aka V2)

Question 45

Answer 45

opthalmic division of trigeminal n (CN V1)

Question 46

Answer 46

superior orbital fissure