Mixed Motor Nerves

Question 1

What nerve is CN V

Answer 1

Trigeminal

Question 2

What division is V1?

Answer 2

Opthalmic division of Trigeminal

Question 3

Function on V1?

Answer 3

somatic sensory: sensory from skin of forehead, scalp, mucous membranes (nasal)

Question 4

What is the location on NCB of V1?

Answer 4

Trigeminal (semilunar) ganglion

Question 5

Where does V1 pass through the skull?

Answer 5

Superior Orbital Fissure

Question 6

Injury to V1 causes what?

Answer 6

Anesthesia (loss of pain and touch) in areas of skin of forehead/mucous membranes of scalp d/t inflammation

Question 7

What branch is V2?

Answer 7

Maxillary branch

Question 8

Function of V2

Answer 8

Maxillary brach is somatic sensory: of upper lip, skin over cheek, palate and maxillary sinus

Question 9

Location of NCB of Maxillary branch V2

Answer 9

Trigeminal ganglion

Question 10

How does V2 pass through skull?

Answer 10

Foramen rotundum on sphenoid bone

Question 11

Loss of pain/touch to the skin over cheek, upper lip or palate?

Answer 11

Maxillary branch; V2

Question 12

Damage to what nerve causes Trigeminal neuraglia or Tic Douloureux = intermittent excructiating pain

Answer 12

Maxillary branch V2~ d/t inflammation

Question 13

What branch is V3?

Answer 13

Mandibular: sensory and motor

Question 14

Function of V3?

Answer 14

Somatic Sensory: skin over jaw, and mucosa on anterior 2/3 of tongue
Branchial Motor: chewing and swallowing

Question 15

Location of NCB of sensory portion of V3

Answer 15

Trigeminal ganglion

Question 16

V3 sensory portion passes through the skull

Answer 16

sphenoid bone–foramen ovale

Question 17

Loss of pain/touch to skin on lower jaw or anterior 2/3 of tongue

Answer 17

V3 sensory of Mandibular d/t inflammation

Question 18

Location of motor NCB of V3

Answer 18

Pons- motor nucleus of V

Question 19

Motor portion of V3 goes through skull:

Answer 19

foramen ovale–sphenoid bone

Question 20

What structures are innervated by motor division of V3?

Answer 20

Muscles of mastication: temporalis, lateral and medial pterygoids, masseter
tensor vili palatini
tensor tympani
mylohyoid
Digastric (anterior belly)

Question 21

Muscles of mastication: temporalis, lateral and medial pterygoids

Answer 21

V3–motor portion of Mandibular

Question 22

Masseter muscle innervation

Answer 22

V3–motor portion of Mandibular

Question 23

Tensor vili Palatini

Answer 23

V3–motor portion of mandibular

Question 24

Tensor Tympani

Answer 24

V3–motor portion of mandibular

Question 25

Mylohyoid

Answer 25

V3--motor portion of mandibular

Question 26

Digastric

Answer 26

V3--motor portion of mandibular

Question 27

CC: difficulty chewing is due to damage where?

Answer 27

V3 motor portion of mandibular nerve-- b/c of inflammation issues

Question 28

Cranial nerve VII

Answer 28

Facial nerve

Question 29

CN VII functions

Answer 29

Somatic Sensory: skin behind ear, external acoustic meatus and tympanic membrane (external surface) Special Sensory: taste from anterior 2/3 of tongue and taste from palate Branchial motor: facial expression

Question 30

Branchial motor: facial expression d/t

Answer 30

CN VII

Question 31

Skin behind ear, external acoustic meatus and tympanic membrane

Answer 31

CN VII

Question 32

Branchial motor function

Answer 32

CN VII

Question 33

Location of NCB of VII Somatic Sensory

Answer 33

Genicular ganglion

Question 34

Passage through skull for Somatic Sensory VII

Answer 34

Temporal bone: internal acoustic meatus and exits stylomastoid foramen

Question 35

Loss of taste sensation from anterior 2/3 of tongue d/t

Answer 35

CN VII deficite to special sensory | --> d/t injury chorda tympani

Question 36

Loss of sensation between skin behind ear, external acoustic meatus, tympanic membrane

Answer 36

CN VII deficite to somatic sensory

Question 37

Location of NCB for Special Sensory of VII

Answer 37

Geniculate ganglion

Question 38

VII Special Sensory passes through skull

Answer 38

Temporal bone: entry-- internal acoustic meatus | exits via petrotypmpanic fissure

Question 39

VII Brachial Motor division functions

Answer 39

Facial expression

Question 40

Location of NCB of branchial division of VII

Answer 40

Pons--Motor nucleus of VII

Question 41

Branchial division of VII passes through skull

Answer 41

Temporal bone: enters internal acoustic meatus | exits: stylomastoid foramen

Question 42

What are the 5 terminal branches of Brachial division of Facial nerve VII

Answer 42

``` Temporal Zygomatic Buccal Mandibular Cervical ```

Question 43

Muscles of facial expression

Answer 43

``` Platysma buccinator Frontalis Occipitalis Orbicularis Oculi *Innervated by Branchial motor of VII ```

Question 44

Stapedius/Stylohyoid/ Digastric (posterior) / facial muscles innervated by:

Answer 44

Branchial Motor of VII

Question 45

Symptoms of Bells Palsy

Answer 45

Facial muscle paralysis Can't close eyes (orbicularis oculi out) Angle of mouth drops (paralysis of m. around mouth) Forehead doesn't wrinkle (due to paralysis of frontalis) **Only applies to peripheral lesions only bc frontalis m is bilaterally innervated

Question 46

Bells palsy caused by which nerve deficiet?

Answer 46

Branchial motor of Facial VII

Question 47

Injury to region of parotid gland causes what type of damage

Answer 47

usually distal to stylomastoid foramen-- CN VII~ Bell's Palsy