Neuro 4&5 CNs (pg.474-76,483-85FA15)

Question 1

Which cell cycle “brakes” regulate going from G1 –> S phase?

Answer 1

Rb and p53

Question 2

Which disorder?:

Abnormal breakdown of elastin in the lungs causing emphysema

• Pt is young
• Pt is NOT a smoker

Answer 2

alpha1-antitrypsin deficiency

Question 3

Which CN’s nuclei are located in the Medulla?

Answer 3

CN IX, X, XII

*XI nucleus is in the spine

Question 4

Which CN’s nuclei are located in the PONS

*(pompoms)

Answer 4

V,VI,VII,VIII

Question 5

Which CN’s nuclei are located in the Midbrain?

Answer 5

CN III, IV

Question 6

Damage to this CN causes down and out, blown out pupil with ptosis

Answer 6

CNIII

Question 7

Damage to this CN causes upward nose gazing and head tilt away from the side of the lesion

Answer 7

CNIV

Question 8

Damage to this CN causes medial pupil (crossed-eye nose gazer)

Answer 8

CNVI

Question 9

Corneal reflex uses stimulation on the eyeball (cotton swab) to test which 2 CNs?

Answer 9

CNV - Opthalmic branch
CNVII - Temporal branch

• v= touch,pain
• vii=lacrimation

Question 10

What causes Trigeminal Neuralgia?

Answer 10

Compression of the nerve

Question 11

Lateral pterygoid does what motion for the jaw?

Answer 11

Opens

Question 12

Damage to this nerve would affect mastication

Answer 12

Mandibular branch of Trigeminal nerve

Question 13

Innervates

• Stylohyoid m
• Posterior belly of Digastric m.
• Stapedius m.

Answer 13

Facial Nerve VII

• mm. of facial expression
• Seven from Second Branchial Arch

Question 14

Parasympathetic innervation

• Lacrimal glands
• Submandibular glands
• Sublingual glands

Answer 14

Facial Nerve VII

Question 15

Taste to anterior 2/3 of tongue

Answer 15

Facial Nerve - VII

Question 16

Mnemonic for CN VII Palsy

Answer 16

“Lovely Bella Had An STD”

Lyme Dz
Bell's palsy
HSV
AIDS
Sarcoidosis
Tumors
Diabetes

Question 17

Motor to stylopharyngeus m

Answer 17

Glossopharyngeal - IX

Question 18

Para’s to parotid gland

Answer 18

Glossopharyngeal - IX

Question 19

Monitors carotid sinus and carotid bodies

Answer 19

IX

Question 20

Sensory to pharynx and back of tongue

Answer 20

IX

Question 21

Taste to posterior 1/3 of tongue

Answer 21

IX

Question 22

Oculomotor is CN?

Answer 22

III

Question 23

Gag reflex tests CNs . . .

Answer 23

IX and X

Question 24

An acute stroke will show contralateral facial paralysis on which part of face?

Answer 24

lower facial paralysis only

*lesion is on cortex which affects upper motor neuron

Question 25

T/F? | Facial nerve palsy will include inability to move forehead?

Answer 25

True, CNVII palsies include ENTIRE ipsilateral facial paralysis *both upper and lower motor neurons affected

Question 26

Taste to extreme back of tongue

Answer 26

X

Question 27

If right X or its nucleus is damaged, to which side will the uvula deviate?

Answer 27

Levator velli palatini m. * Uvula will deviate to opposite side (away) - a pulling m.

Question 28

Motor to tongue

Answer 28

XII - Hypoglossal

Question 29

If right Hypoglossal n. or nucleus is damaged, to which side will the tongue deviate when sticking out?

Answer 29

Tongue deviates toward lesion * "Tongue Licks the Lesion" * If cortical damage, no deviation noted because cortex innervates both sides of tongue

Question 30

Is tongue a pushing or pulling m?

Answer 30

Pushing m