7/8- Cranial Nerves

Question 1

Damage to C1-5

Answer 1

UMN damage to all 4 limbs

Question 2

Damage to C6-T2

Answer 2

Legs- UMN damage

Arms- LMN damage

Question 3

Damage to T3-L3

Answer 3

Legs- UMN damage

Arms- Fine

Question 4

Damage to L4-S2

Answer 4

Legs- LMN damage

Arms- fine

Question 5

Attachment for I

Answer 5

Olfactory Bulb

Question 6

Attachment fo II

Answer 6

Optic Chiasm

Question 7

Attachment for III

Answer 7

Rostral Midbrain (ventral)

Question 8

Attachment for IV

Answer 8

Midbrain/pons junction (dorsal

Question 9

Attachment for V

Answer 9

Pons (lateral)

Question 10

Attachment for VI

Answer 10

Pontomedullary junction

Ventral

Question 11

Attachment for VII

Answer 11

Pontomedullary junction

Ventral/Lateral

Question 12

Attachment for VIII

Answer 12

Pontomedullary junction

Ventral/Lateral)

Question 13

Attachment fo IX

Answer 13

Rostral Medullar (Lateral)

Question 14

Attachment for X

Answer 14

Rostral Medullar (Lateral)

Question 15

Attachment for XI

Answer 15

Cervical spinal cord (L)

Question 16

Attachment fo XII

Answer 16

Rostral medulla (Ventral/lateral)

Question 17

Damage to Olfactory Nerve

Answer 17

Anosmia- can’t smell

Conductive- problem with axon

Sensorineural- damage to pathway

Question 18

Inner Hair Cells

Answer 18

Principle source of sound info

Question 19

Outer Hair Cells

Answer 19

Controls sensitivity

Question 20

Pupillary Light Reflex/ Oculomotor Dx

Answer 20

Abnormal pupillary light response

Lack of constriction of pupil

Question 21

Function of VI

Answer 21

ABduction of eye

Innervates lateral rectus (ipsilateral)

Question 22

Function fo XI

Answer 22

Shrugging shoulder

Turning head to contralateral side

Question 23

Supranuclear Damage to Hypoglossal Nerve

Answer 23

Weakness of contralateral muscles

Tongue moves away from side of damage

Question 24

Nucelar or Nerve Damage to Hypoglossal Nerve

Answer 24

Weakness of ipsilateral muscles

Tongues moves towards side of damage

Question 25

Sensory Territory of V

Answer 25

Skin of face Mucous membrane Teeth Dura mater Intracranial muscles

Question 26

Mesencephalic nuclei

Answer 26

Only CNS nucleus to contain unipolar sensory neurons

Question 27

V Has Motor Innervartion to

Answer 27

Mastication muscle Tensor timpani (inner ear) Tensor palati (soft palate) Mylohyoid and digastric muscle (under jaw)

Question 28

Supranuclear Lesions to Facial Nerve

Answer 28

Contralateral motor weakness of lower face

Question 29

Nuclear Lesion to Facial Nerve

Answer 29

Complete facial and abducens paralysis on side of lesion Can't raise eyebrow, close eye, retract lip Lesion in nucleus and nevre affects abducens nerve which innervates lateral rectus= can't ABduct eye

Question 30

Bell's Palsy

Answer 30

Complete paralysis on sid of lesion Can't raise eyebrow, close eye, retract lip

Question 31

Solitary Nucleus Receives Input From

Answer 31

Viscera Taste buds (posterior 1/3) Carotid body (chemoreceptor- monitors CO2,pH levels) Carotid sinus (Monitor BP -Barr receptor) Mucous Membranes

Question 32

Glossopharyngeal Nerve

Answer 32

IX Primarily sensory

Question 33

Vagus Nerve

Answer 33

X Most widely distributed CN Mainly parasymptathetic innveration - One side innervates thorax, one side innervates abdomen Have afferent and efferents from these regions Stimulus and response can be in different parts of the body

Question 34

VII Role in Taset

Answer 34

Soft Palate Foliate papillae Fungiform papillae

Question 35

IX Role in Taste

Answer 35

Circumvallate papillae Foliate papillae

Question 36

X Role in Taste

Answer 36

Epiglottis

Question 37

Projection of Tastes

Answer 37

VII and IX go to VPM of thalamus, then go to gustatory ` in insula

Question 38

Where does optic nerve go in thalamus

Answer 38

LGN

Question 39

Where does vestibular nerve go in thalamus

Answer 39

MGN

Question 40

Where does olfactory nerve go in thalamus

Answer 40

Dorsomedial nucleus---> VPM----> inferior salivatory nucleus

Question 41

Where does trigeminal nerve go in thalamus

Answer 41

VPM

Question 42

Where does Glossopharyngeal nerve go in thalamus

Answer 42

VPM

Question 43

Where does Vagus nerve go in thalamus

Answer 43

VPM and VPL

Question 44

In General, sensation from body goes to

Answer 44

VPL (via DCML and spinothalamic)

Question 45

In general, sensation from face goes to

Answer 45

VPM

Question 46

3 Zones of trigeminal nerve

Answer 46

Opthalamic (forehead) Maxillary (mouth) Mandibular (jaw)