Final Exam Review- E2 CN's

Question 1

Which geometric “space” transmits the circumflex scapular artery?

Answer 1

The Triangular Space

Question 2

Which geometric space transmits the circumflex humeral artery and the Axillary Nerve?

Answer 2

The Quadrangular Space

Question 3

Which artery is located underneath the Pterion?

Answer 3

Middle Meningeal Artery. (very susceptible to injury)

Question 4

What is the brain stem nucleus not involved in cranial function?

Answer 4

Ventral Medial Nucleus (in the thalamus)

Question 5

NOT ON TEST: but fun knowledge, which cranial nerve wraps another CN nucleus?

Answer 5

VII wraps around VI’s nucleus

Question 6

Which muscle is innvervated by the abducens (VI) nerve?

Answer 6

Lateral Rectus. Boom.

Question 7

Where do the optic nerve fibers terminate after they decussate?

Answer 7

Occipital Portion of the Brain

Question 8

What is the FACIAL EXPRESSION muscle Platysma innervated by?

Answer 8

VII

Question 9

Which section of the brain controls balance and posture?

Answer 9

The Cerebellum

Question 10

Which cranial nerve nuclei would be damaged if there was trauma to the Medulla? What are the other two “houses” for CN’s?

Answer 10

The last 4 (IX,X,XI,XII) The midbrain houses 4, the Pons houses 4, and the Medulla Houses the last 4. A GENERAL rule of thumb

Question 11

What is the Masseter innervated by?

Answer 11

V, muscle of mastication (VII Facial Expression)

Question 12

Which two CNs provide MOTOR innervation to the tongue?

Answer 12

XII, X

Question 13

Which CN gives TASTE to the POSTERIOR 1/3 of the tongue?

Answer 13

IX Glossopharyngeal

Question 14

What CN gives TASTE to the anterior 2/3 of tongue?

Answer 14

VII Facial (mandibular?)

Question 15

Which CN controls the Efferent Gag reflex? What about the Afferent Gag reflex?

Answer 15

Efferrent:X Vagus (Throwing Up) AFFERENT: IX GlossoPharyngeal

Question 16

Which nerve gives sensory information to the Hypothenar Region of the hand?

Answer 16

Ulnar Nerve

Question 17

Which skull bone houses the vestibulocochlear nerve?

Answer 17

Temporal Bone

Question 18

What “muscles” control LENS accommodation–>(FOCUS) in the eye?

Answer 18

Cilliary Body

Question 19

What cranial nerve & ganglion control the Pupil?

Answer 19

III (Oculomotor) & Superior Cervical Ganglion. Remember LUNG cancer can lead to vision problems!

Question 20

What happens to the pupil when you blow CN III? What happens when you blow the Superior Cervical Ganglion/Cilliary Body?

Answer 20

CN III Blown= Pupils become DILATED.. Superior Cerv. Gang=Puils cannot dilate and stay SMALL

Question 21

What refers to the cross of the optic fibers?

Answer 21

The optic chiasm

Question 22

Which directions will the eye face if you BLOW CN IV?

Answer 22

Up and In

Question 23

What would be unaffected with a VIII lesion?

Answer 23

Somatic Motor Fibers. VIII is SENSORY ONLY

Question 24

What is not affected in a VII Lesion?

Answer 24

Your ability to open the eye, so it will STAY OPEN resulting in a tarsorraphy surgery.

Question 25

A lesion of CN III would do all the following except:

Answer 25

Constrict the Pupil (if III is blown, the pupil would be permanently dilated)

Question 26

What lesion would cause a tongue deviation to the Right?

Answer 26

Damage to the R XII.

Question 27

What CN damage would cause a Medial turn in one eyeball? TRIVIA: what is the medical name for this?

Answer 27

VI abducens. LR is Out...EE-so-Tropia

Question 28

What is the most common palsy of a CN?

Answer 28

Bell's Palsy of CN VII

Question 29

A lateral tarsorrhaphy is performed because of issues with what CN?

Answer 29

VII, because you cannot close the eye

Question 30

What MAJOR problem would lead to difficulty swallowing and a Left tongue atrophy?

Answer 30

Damage to the L XII due to a malignancy (cancer) lesion on L XII

Question 31

What type of palsy would lead to End (LOWER) Organ dysfunction of X,XI,XII?

Answer 31

A Bulbar Palsy (remember?! lower lesion vs pseudo-bulbar being upper lesion)

Question 32

What would the result in food dribbling from the mouth?

Answer 32

A Bell's Palsy (CN VII)

Question 33

Which CN is damaged if the Pt's eye points INFERIOR and LATERAL?

Answer 33

III

Question 34

Which CN damage would cause numbness to the Nasopharnyx?

Answer 34

CN IX

Question 35

What nerve severance would lead directly to DEATH?

Answer 35

X Vagus

Question 36

What CN gives SENSATION to the anterior 2/3 of the tongue? (Not talking about TASTE here)

Answer 36

V

Question 37

AFFERENT nerve branches that innervate the mucosa of the PHARYNX are a part of which CN?

Answer 37

IX Glossopharyngeal

Question 38

An injury to the submandibular triangle causes tongue deviation to the left, which CN has been damaged?

Answer 38

Left CN XII

Question 39

A stroke (infarct) causes difficulty swallowing. What CN is Unaffected by this?

Answer 39

XI (Spinal Accessory doesn't have anything to do with swallowing)

Question 40

What CN has a lesion if a Pt has dry nasal sinuses, no tears, and no taste in anterior 2/3 of tongue?

Answer 40

VII

Question 41

What CN damage would leave to difficultly swallowing and coughing?

Answer 41

X (C/O coughing)

Question 42

What cranial nerve damage would cause sensitivity to loud sounds (hyperacusis)?

Answer 42

VII

Question 43

When examining an ear infection, the Pt coughs when you put a q tip in there. Which CN caused this?

Answer 43

X

Question 44

What CN damage would lead to Ptosis of the eyelid, dilation of the pupil, and the eye being pointed laterally and down?

Answer 44

III

Question 45

When a pupillary light reflex test is done which nerves are being checked?

Answer 45

II Optic (for accomodation sending message to both eyes) III because it constricts the pupil

Question 46

A middle ear infection leads to complications in temporal bone and then he Pt can't close Right eye and can't close mouth. Which CN was infected?

Answer 46

VII

Question 47

After tonsils removed a Pt loses gag reflex and the sensory on posterior 1/3 of tongue. Which CN was affected?

Answer 47

IX Glossophayrnegal

Question 48

Which two nerves are most susceptible to damage in a Mastectomy?

Answer 48

Long Thoracic Nerve & Thoracodorsal

Question 49

The recurrent laryngal nerve is a branch off of which CN?

Answer 49

X