Mixed Motor Nerves Flashcards Preview

Clinical Human Anatomy: Head and Neck > Mixed Motor Nerves > Flashcards

Flashcards in Mixed Motor Nerves Deck (47):
1

What nerve is CN V

Trigeminal

2

What division is V1?

Opthalmic division of Trigeminal

3

Function on V1?

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

4

What is the location on NCB of V1?

Trigeminal (semilunar) ganglion

5

Where does V1 pass through the skull?

Superior Orbital Fissure

6

Injury to V1 causes what?

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

7

What branch is V2?

Maxillary branch

8

Function of V2

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

9

Location of NCB of Maxillary branch V2

Trigeminal ganglion

10

How does V2 pass through skull?

Foramen rotundum on sphenoid bone

11

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

Maxillary branch; V2

12

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

Maxillary branch V2~ d/t inflammation

13

What branch is V3?

Mandibular: sensory and motor

14

Function of V3?

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

15

Location of NCB of sensory portion of V3

Trigeminal ganglion

16

V3 sensory portion passes through the skull

sphenoid bone--foramen ovale

17

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

V3 sensory of Mandibular d/t inflammation

18

Location of motor NCB of V3

Pons- motor nucleus of V

19

Motor portion of V3 goes through skull:

foramen ovale--sphenoid bone

20

What structures are innervated by motor division of V3?

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

21

Muscles of mastication: temporalis, lateral and medial pterygoids

V3--motor portion of Mandibular

22

Masseter muscle innervation

V3--motor portion of Mandibular

23

Tensor vili Palatini

V3--motor portion of mandibular

24

Tensor Tympani

V3--motor portion of mandibular

25

Mylohyoid

V3--motor portion of mandibular

26

Digastric

V3--motor portion of mandibular

27

CC: difficulty chewing is due to damage where?

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

28

Cranial nerve VII

Facial nerve

29

CN VII functions

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

30

Branchial motor: facial expression d/t

CN VII

31

Skin behind ear, external acoustic meatus and tympanic membrane

CN VII

32

Branchial motor function

CN VII

33

Location of NCB of VII Somatic Sensory

Genicular ganglion

34

Passage through skull for Somatic Sensory VII

Temporal bone: internal acoustic meatus and exits stylomastoid foramen

35

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

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

36

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

CN VII deficite to somatic sensory

37

Location of NCB for Special Sensory of VII

Geniculate ganglion

38

VII Special Sensory passes through skull

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

39

VII Brachial Motor division functions

Facial expression

40

Location of NCB of branchial division of VII

Pons--Motor nucleus of VII

41

Branchial division of VII passes through skull

Temporal bone: enters internal acoustic meatus
exits: stylomastoid foramen

42

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

Temporal
Zygomatic
Buccal
Mandibular
Cervical

43

Muscles of facial expression

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

44

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

Branchial Motor of VII

45

Symptoms of Bells Palsy

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

46

Bells palsy caused by which nerve deficiet?

Branchial motor of Facial VII

47

Injury to region of parotid gland causes what type of damage

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