Quiz: Anatomy_Lab4

Question 1

1. Which bones meet at the pteryon? Choose all that apply.

Choices:

• parietal bone
• temporal bone
• sphenoid bone
• frontal bone
• occipital bone
• zygoma

Answers:

• parietal bone
• temporal bone
• sphenoid bone
• frontal bone

Comments:

• Correct
• That's right! The parietal, temporal, sphenoid, and frontal bones meet at the pteryon.
• Continue

Question 2

2. Identify A.

Choices:

• lateral pterygoid plate
• maxillary palatine/palatal process
• palatine bones
• incisive canal
• greater palatine foramen
• mastoid process
• zygomatic process
• mandibular fossa
• foramen magnum
• occipital condyles

Answers:

• lateral pterygoid plate

Comments:

• Correct
• That's right! ’A’ is the lateral pterygoid plate. The pterygoid process consists of the lateral and medial pterygoid plates.
• Continue

Question 3

3. Identify B.

Choices:

• lateral pterygoid plate
• maxillary palatine/palatal process
• palatine bones
• incisive canal
• greater palatine foramen
• mastoid process
• zygomatic process
• mandibular fossa
• foramen magnum
• occipital condyles

Answers:

• maxillary palatine/palatal process

Comments:

• Correct
• That's right! ’B’ is the palatine/palatal process of the maxilla. The palatal processes form most of the hard palate, which is the roof of the mouth and floor of nasal cavity.
• Continue

Question 4

4. Identify C.

Choices:

• lateral pterygoid plate
• maxillary palatine/palatal process
• palatine bones
• incisive canal
• greater palatine foramen
• mastoid process
• zygomatic process
• mandibular fossa
• foramen magnum
• occipital condyles

Answers:

• palatine bones

Comments:

• Correct
• That's right! ‘C’ is the left palatine bone. The palatine bones form the posterior part of the hard palate.
• Continue

Question 5

5. Identify D.

Choices:

• lateral pterygoid plate
• maxillary palatine/palatal process
• palatine bones
• incisive canal
• greater palatine foramen
• mastoid process
• zygomatic process
• mandibular fossa
• foramen magnum
• occipital condyles

Answers:

• incisive canal

Comments:

• Correct
• That's right! The incisive canal (D) is located between the two palatal process of the maxillae and posterior to the medial incisors. Blood vessels and branches of CN V2 pass through this passageway.
• Continue

Question 6

6. Identify E.

Choices:

• lateral pterygoid plate
• maxillary palatine/palatal process
• palatine bones
• incisive canal
• greater palatine foramen
• mastoid process
• zygomatic process
• mandibular fossa
• foramen magnum
• occipital condyles

Answers:

• greater palatine foramen

Comments:

• Correct
• That's right! The greater palatine foramen (E) is a feature of the palatine bone. It is medial to the lesser palatine foramen. Vessels and nerves pass through these openings to reach the palate.
• Continue

Question 7

7. Identify F.

Choices:

• lateral pterygoid plate
• maxillary palatine/palatal process
• palatine bones
• incisive canal
• greater palatine foramen
• mastoid process
• zygomatic process
• mandibular fossa
• foramen magnum
• occipital condyles

Answers:

• mastoid process

Comments:

• Correct
• That's right! ‘F’ is the mastoid process. The sternocleidomastoid muscle attaches here!
• Continue

Question 8

8. Identify G.

Choices:

• lateral pterygoid plate
• maxillary palatine/palatal process
• palatine bones
• incisive canal
• greater palatine foramen
• mastoid process
• zygomatic process
• mandibular fossa
• foramen magnum
• occipital condyles

Answers:

• zygomatic process

Comments:

• Correct
• That's right! The zygomatic process of the temporal bone (G) forms the zygomatic arch with the temporal process of the zygomatic bone.
• Continue

Question 9

9. Identify H.

Choices:

• lateral pterygoid plate
• maxillary palatine/palatal process
• palatine bones
• incisive canal
• greater palatine foramen
• mastoid process
• zygomatic process
• mandibular fossa
• foramen magnum
• occipital condyles

Answers:

• mandibular fossa

Comments:

• Correct
• That's right! The mandibular fossa (H) articulates with the head of the condyloid process of the mandible to form the temporomandibular joint.
• Continue

Question 10

10. Identify I.

Choices:

• lateral pterygoid plate
• maxillary palatine/palatal process
• palatine bones
• incisive canal
• greater palatine foramen
• mastoid process
• zygomatic process
• mandibular fossa
• foramen magnum
• occipital condyles

Answers:

• foramen magnum

Comments:

• Correct
• That's right! The foramen magnum (I) is the opening through which the brainstem is continuous with the spinal cord.
• Continue

Question 11

11. Identify J.

Choices:

• lateral pterygoid plate
• maxillary palatine/palatal process
• palatine bones
• incisive canal
• greater palatine foramen
• mastoid process
• zygomatic process
• mandibular fossa
• foramen magnum
• occipital condyles

Answers:

• occipital condyles

Comments:

• Correct
• That's right! The occipital condyles (J) are located lateral to the foramen magnum. The atlas articulates with the skull here, forming the atlanto-occipital joint. This articulation permits the nodding mvt.
• Continue

Question 12

12. What passes through the greater & lesser palatine foramina? Choose all that apply.

Choices:

• blood vessels
• trigeminal maxillary division
• lymphatics
• salivary ducts
• trigeminal ophthalmic division
• trigeminal mandibular division

Answers:

• blood vessels
• trigeminal maxillary division

Comments:

• Correct
• That's right! Blood vessels and branches of the maxillary division of the trigeminal nerve pass through the greater & lesser palatine foramina to reach the palate.
• Continue

Question 13

13. Identify K.

Choices:

• foramen ovale
• foramen spinosum
• foramen lacerum
• carotid canal
• jugular foramen

Answers:

• foramen ovale

Comments:

• Correct
• That's right! The foramen ovale (K) is an opening posterolateral to the lateral pterygoid plate. Through it passes the mandibular division of trigeminal nerve (CN V3).
• Continue

Question 14

14. Identify L.

Choices:

• foramen ovale
• foramen spinosum
• foramen lacerum
• carotid canal
• jugular foramen

Answers:

• foramen spinosum

Comments:

• Correct
• That's right! The foramen spinosum (L) is located lateral to the foramen ovale. Through it the middle meningeal branch of the maxillary artery enters cranial cavity.
• Continue

Question 15

15. Identify M.

Choices:

• foramen ovale
• foramen spinosum
• foramen lacerum
• carotid canal
• jugular foramen

Answers:

• foramen lacerum

Comments:

• Correct
• That's right! The foramen lacerum (M) is located posterior to the medial pterygoid plate.
• Continue

Question 16

16. Identify N.

Choices:

• foramen ovale
• foramen spinosum
• foramen lacerum
• carotid canal
• jugular foramen

Answers:

• carotid canal

Comments:

• Correct
• That's right! The carotid canal (N) runs through the temporal bone. The internal carotid artery travels through the canal to gain access into the cranial cavity.
• Continue

Question 17

17. Identify O.

Choices:

• foramen ovale
• foramen spinosum
• foramen lacerum
• carotid canal
• jugular foramen

Answers:

• jugular foramen

Comments:

• Correct
• That's right! The jugular foramen (O) is a fissure between the occipital bone and the petrous portion of the temporal bone.
• Continue

Question 18

18. Identify A.

Choices:

• neck of condyloid process
• angle of mandible
• mandibular coronoid process
• head of condyloid process
• mandibular condyloid process

Answers:

• neck of condyloid process

Comments:

• Correct
• That's right! It is the neck of the condyloid process (A). This can also be referred to simply as the neck of the mandible.
• Continue

Question 19

19. Identify B.

Choices:

• neck of condyloid process
• angle of mandible
• mandibular coronoid process
• head of condyloid process
• mandibular condyloid process

Answers:

• angle of mandible

Comments:

• Correct
• That's right! The ramus and body of mandible meet at the angle of the mandible (B).
• Continue

Question 20

20. Identify C.

Choices:

• neck of condyloid process
• angle of mandible
• mandibular coronoid process
• head of condyloid process
• mandibular condyloid process

Answers:

• mandibular coronoid process

Comments:

• Correct
• That's right! The coronoid process of the mandible (C) is located superior to the ramus. The temporalis muscle attaches here.
• Continue

Question 21

21. Identify D.

Choices:

• neck of condyloid process
• angle of mandible
• mandibular coronoid process
• head of condyloid process
• mandibular condyloid process

Answers:

• head of condyloid process

Comments:

• Correct
• That's right! This is the head of the condyloid process of the mandible (D). This can also be referred to simply as the head of the mandible.
• Continue

Question 22

22. Identify E.

Choices:

• neck of condyloid process
• angle of mandible
• mandibular coronoid process
• head of condyloid process
• mandibular condyloid process

Answers:

• mandibular condyloid process

Comments:

• Correct
• That's right! The condyloid process of the mandible (E) is comprised of the head and neck of the mandible.
• Continue

Question 23

23. What is the name of canal A?

Choices:

• mandibular canal
• harvesian canal
• coronoid canal
• condyloid canal

Answers:

• mandibular canal

Comments:

• Correct
• That's right! The mandibular canal (A) is a passageway through the mandible that opens at the mental foramen.
• Continue

Question 24

24. What is the name of the nerve that enters canal A?

Choices:

• inferior alveolar nerve
• inferior mandibular nerve
• condylo-coronoid nerve
• longitudinal alveolar nerve

Answers:

• inferior alveolar nerve

Comments:

• Correct
• That's right! The inferior alveolar nerve, a branch of the mandibular division of the trigeminal nerve, enters the mandibular canal and exits the mental foramen as the mental nerve.
• Continue

Question 25

25. What bones contribute to the zygomatic arch? Choose all that apply.

Choices:

• the zygoma
• the temporal bone
• the frontal bone
• the sphenoid bone
• the maxillary bone

Answers:

• the zygoma
• the temporal bone

Comments:

• Correct
• That's right! The zygoma and temporal bones contribute to the zygomatic arch.
• Continue

Question 26

26. Identify opening A.

Choices:

• infraorbital foramen
• infraoccular foramen
• paranasal foramen
• zygomatic foramen

Answers:

• infraorbital foramen

Comments:

• Correct
• That's right! The infraorbital foramen (A) is the opening through which the infraorbital branch of the maxillary division of trigeminal nerve passes to reach the skin of lower eyelid, upper chin and lip.
• Continue

Question 27

27. Identify feature B.

Choices:

• superior alveolar process of maxillary bone
• inferior maxillary projections
• inferior process of nasal bone
• inferior alveolar process of maxillary bone

Answers:

• superior alveolar process of maxillary bone

Comments:

• Correct
• That's right! The superior alveolar process of the maxillary bone (B) houses the maxillary teeth.
• Continue

Question 1

1. Which of the following are actions of the medial pterygoid muscles when they are contracted bilaterally? Choose all that apply.

Choices:

• elevation of the mandible
• protraction of the mandible
• depression of the mandible
• retraction of the mandible
• lateral movement of the mandible

Answers:

• elevation of the mandible
• protraction of the mandible

Comments:

• Correct
• That's right! When the medial pterygoid muscles contract bilaterally they facilitate elevation and protrusion / protraction of the mandible.
• Continue

Question 2

2. Identify A.

Choices:

• maxillary artery
• external carotid artery
• inferior alveolar artery & nerve
• lingual nerve
• facial artery
• buccinator muscle
• temporalis muscle

Answers:

• maxillary artery

Comments:

• Correct
• That's right! The maxillary artery (A) branches off the external carotid posterior to the ramus of the mandible. Once the maxillary artery branches off it, the external carotid artery becomes the superficial temporal artery.
• Continue

Question 4

4. Identify C.

Choices:

• maxillary artery
• external carotid artery
• inferior alveolar artery & nerve
• lingual nerve
• facial artery
• buccinator muscle
• temporalis muscle

Answers:

• inferior alveolar artery & nerve

Comments:

• Correct
• That's right! The inferior alveolar nerve and artery (C) run through the mandibular canal. The nerve is a branch of CN V3, providing general sensation to the mandibular teeth. As it emerges from mental foramen, it becomes the mental nerve and supplies general sensation to the skin of the chin and lower lip.
• Continue

Question 5

5. Identify D.

Choices:

• maxillary artery
• external carotid artery
• inferior alveolar artery & nerve
• lingual nerve
• facial artery
• buccinator muscle
• temporalis muscle

Answers:

• lingual nerve

Comments:

• Correct
• That's right! It is the lingual nerve. To distinguish the lingual nerve from the inferior alveolar nerve in the infratemporal fossa, notice that it disappears MEDIAL TO the mandible, toward the floor of the mouth, rather than into the mandibular canal.
• Continue

Question 6

6. Identify E.

Choices:

• maxillary artery
• external carotid artery
• inferior alveolar artery & nerve
• lingual nerve
• facial artery
• buccinator muscle
• temporalis muscle

Answers:

• facial artery

Comments:

• Correct
• That's right! The facial artery (E) is curvy compare to its companion vein and passes superiorly over the body of the mandible. The facial artery is a branch of the external carotid artery.
• Continue

Question 7

7. Identify F.

Choices:

• maxillary artery
• external carotid artery
• inferior alveolar artery & nerve
• lingual nerve
• facial artery
• buccinator muscle
• temporalis muscle

Answers:

• buccinator muscle

Comments:

• Correct
• That's right! The buccinator muscle (F) consists of horizontal muscle fibres deep to the masseter (removed here). It is a muscle of facial expression and is therefore innervated by CN VII.
• Continue

Question 8

8. Identify G.

Choices:

• maxillary artery
• external carotid artery
• inferior alveolar artery & nerve
• lingual nerve
• facial artery
• buccinator muscle
• temporalis muscle

Answers:

• temporalis muscle

Comments:

• Correct
• That's right! The temporalis muscle (G) is a broad, fan- shaped muscle superior to the zygomatic arch. It attaches to the coronoid process of the mandible (removed here) and is one of the muscles of mastication.
• Continue

Question 9

9. Identify A.

Choices:

• lateral pterygoid muscle
• lingual nerve
• medial pterygoid muscle
• inferior alveolar artery and nerve
• buccinator muscle
• facial artery

Answers:

• lateral pterygoid muscle

Comments:

• Correct
• That's right! The lateral pterygoid muscle (A) runs horizontally forward. It pulls the neck of the mandible forward, and therefore protracts the jaw.
• Continue

Question 10

10. Identify B.

Choices:

• lateral pterygoid muscle
• lingual nerve
• medial pterygoid muscle
• inferior alveolar artery and nerve
• buccinator muscle
• facial artery

Answers:

• lingual nerve

Comments:

• Correct
• That's right! The lingual nerve (B) is located anterior to the inferior alveolar nerve.
• Continue

Question 11

11. Identify C.

Choices:

• lateral pterygoid muscle
• lingual nerve
• medial pterygoid muscle
• inferior alveolar artery and nerve
• buccinator muscle
• facial artery

Answers:

• medial pterygoid muscle

Comments:

• Correct
• That's right! The medial pterygoid muscle (C) arises from the medial surface of the lateral pterygoid plate and the posterior surface of the maxilla and attaches near the angle of the mandible. Bilateral contraction of these muscles results in elevation and protrusion of the mandible.
• Continue

Question 12

12. Identify D.

Choices:

• lateral pterygoid muscle
• lingual nerve
• medial pterygoid muscle
• inferior alveolar artery and nerve
• buccinator muscle
• facial artery

Answers:

• inferior alveolar artery and nerve

Comments:

• Correct
• That's right! The inferior alveolar nerve and artery (D) runs through the mandibular canal. The nerve is a branch of CN V3 and supplies general sensation to the mandibular teeth. It emerges from the mental foramen and ends as the mental nerve, which supplies general sensation to the skin of the chin and lower lip.
• Continue

Question 13

13. Identify E.

Choices:

• lateral pterygoid muscle
• lingual nerve
• medial pterygoid muscle
• inferior alveolar artery and nerve
• buccinator muscle
• facial artery

Answers:

• buccinator muscle

Comments:

• Correct
• That's right! The buccinator muscle (E) is located deep to the masseter (removed here). It functions to keep chin against the teeth when chewing and is a muscle of facial expression.
• Continue

Question 14

14. Identify F.

Choices:

• lateral pterygoid muscle
• lingual nerve
• medial pterygoid muscle
• inferior alveolar artery and nerve
• buccinator muscle
• facial artery

Answers:

• facial artery

Comments:

• Correct
• That's right! The facial artery (E) is curvy compare to its companion vein and passes superiorly over the body of the mandible. The facial artery is a branch of the external carotid artery.
• Continue

Question 15

15. Which nerve innervates the muscles of mastication?

Choices:

• The lingual nerve.
• The inferior alveolar nerve.
• The mandibular division of the trigeminal nerve.
• The facial nerve.

Answers:

• The mandibular division of the trigeminal nerve.

Comments:

• Correct
• That's right! The mandibular division of the trigeminal nerve innervates the muscles of mastication. These are the temporalis, masseter, medial and lateral pterygoid muscles.
• Continue

Question 1

1. From the following list of muscles, choose all those that are muscles of facial expression.

Choices:

• obicularis oris
• buccinator
• obicularis oculi
• masseter
• temporalis

Answers:

• obicularis oris
• buccinator
• obicularis oculi

Comments:

• Correct
• That's right! The orbicularis oris, buccinator and orbicularis oculi are muscles of facial expression, innervated by the facial nerve. The masseter and the temporalis are muscles of mastication, along with the medial and lateral pterygoids, and are innervated by the mandibular division of the trigeminal nerve, V3.
• Continue

Question 2

2. Which cranial nerve carries parasympathetic PREganglionic fibres destined for the parotid gland? Which branch of the trigeminal nerve ultimately DELIVERS the postganglionic fibres to the parotid gland?

Choices:

• CN IX, glossopharyngeal nerve; V3, auriculotemporal nerve
• CN IX, glossopharyngeal nerve; V2, infraorbital nerve
• CN VII, facial nerve; CN V2, infraorbital nerve
• CN VII, facial nerve; V3, auriculotemporal nerve

Answers:

• CN IX, glossopharyngeal nerve; V3, auriculotemporal nerve

Comments:

• Correct
• That's right! CN IX, glossopharyngeal nerve carries parasympathetic preganglionic fibres which synapse at the otic ganglion. The postganglionic fibres are delivers to the parotid gland via the auriculotemporal nerve (V3).
• Continue

Question 3

3. Identify A.

Choices:

• facial vein
• buccinator muscle
• internal jugular vein
• parotid duct
• facial artery
• masseter muscle
• branches of facial nerve

Answers:

• facial vein

Comments:

• Correct
• That's right! The facial vein (A) is located posterior to the facial artery. Also, its course is very much straight, as compared to the facial artery, which wends its way across the face toward the medial angle of the eye.
• Continue

Question 3

3. Identify B.

Choices:

• maxillary artery
• external carotid artery
• inferior alveolar artery & nerve
• lingual nerve
• facial artery
• buccinator muscle
• temporalis muscle

Answers:

• external carotid artery

Comments:

• Correct
• That's right! The external carotid artery (B) is located posterior to the ramus of the mandible.
• Continue

Question 4

4. Identify B.

Choices:

• facial vein
• buccinator muscle
• internal jugular vein
• parotid duct
• facial artery
• masseter muscle
• branches of facial nerve

Answers:

• buccinator muscle

Comments:

• Correct
• That's right! The buccinator muscle (B) is located deep to the masseter. Its fibres run horizontally, perpendicular to those of the masseter.
• Continue

Question 5

5. Identify C.

Choices:

• facial vein
• buccinator muscle
• internal jugular vein
• parotid duct
• facial artery
• masseter muscle
• branches of facial nerve

Answers:

• internal jugular vein

Comments:

• Correct
• That's right! The facial vein (A) is a tributary of the internal jugular vein (C). Once you identify the facial vein, you can trace it back to find the internal jugular vein.
• Continue

Question 6

6. Identify D.

Choices:

• facial vein
• buccinator muscle
• internal jugular vein
• parotid duct
• facial artery
• masseter muscle
• branches of facial nerve

Answers:

• parotid duct

Comments:

• Correct
• That's right! The parotid duct (D) runs horizontally across the superficial surface of the masseter.
• Continue

Question 7

7. Identify E.

Choices:

• facial vein
• buccinator muscle
• internal jugular vein
• parotid duct
• facial artery
• masseter muscle
• branches of facial nerve

Answers:

• facial artery

Comments:

• Correct
• That's right! The facial artery (E) passes parallel to the anterior border of the masseter. It wends its way superiorly and ends as the angular artery near the medial canthus of the eye.
• Continue

Question 8

8. Identify F.

Choices:

• facial vein
• buccinator muscle
• internal jugular vein
• parotid duct
• facial artery
• masseter muscle
• branches of facial nerve

Answers:

• masseter muscle

Comments:

• Correct
• That's right! Fibres of the masseter muscle (F) pass from the zygomatic arch to the angle of the mandible. This muscle functions to elevate the mandible during mastication.
• Continue

Question 9

9. Identify G.

Choices:

• facial vein
• buccinator muscle
• internal jugular vein
• parotid duct
• facial artery
• masseter muscle
• branches of facial nerve

Answers:

• branches of facial nerve

Comments:

• Correct
• That's right! The facial nerve exits the cranium via the stylomastoid foramen and enters the substance of the parotid gland (removed here). Within the gland, CN VII forms the parotid plexus which gives rise to the branches of facial nerve (G) that innervate the muscles of facial expression.
• Continue

Question 1

1. The facial nerve is cranial nerve ______. Enter the correct Roman numeral.

Choices:

• VII

Answers:

• VII

Comments:

• Correct
• That's right! Facial nerve, cranial nerve VII, controls the muscles of facial expression. This nerve also carries parasympathetic preganglionic and taste fibres.
• Continue

Question 14

14. Which cranial nerves are exclusively motor to skeletal muscle?

Choices:

• hypoglossal, CN XII
• trochlear, CN IV
• abducens, CN VI
• accessory, CN XI
• trigeminal, CN V
• vagus, CN X
• oculomotor, CN III
• facial, CN VII

Answers:

• hypoglossal, CN XII
• trochlear, CN IV
• abducens, CN VI
• accessory, CN XI

Comments:

• Correct
• That's right! There are four cranial nerves that are exclusively motor to skeletal muscle: trochlear (CN IV), abducens (CN IV), accessory (CN XI) and hypoglossal (CN XII). Although the oculomotor (CN III) contains somatic motor fibres, it also contains parasympathetic fibres.
• Continue

Question 13

13. Which cranial nerves contain parasympathetic preganglionic fibres?

Choices:

• vagus, CN X
• oculomotor, CN III
• glossopharyngeal, CN IX
• facial, CN VII
• hypoglossal, CN XI
• trochlear, CN IV
• abducens, CN VI
• trigeminal, CN V

Answers:

• vagus, CN X
• oculomotor, CN III
• glossopharyngeal, CN IX
• facial, CN VII

Comments:

• Correct
• That's right! Four cranial nerves contain parasympathetic preganglionic fibres: the oculomotor (CN III), facial (CN VII), glossopharyngeal (CN IX) and vagus (CN X).
• Continue

Question 2

2. The oculomotor nerve is cranial nerve ______. Enter the correct Roman numeral.

Choices:

• III

Answers:

• III

Comments:

• Correct
• That's right! The oculomotor nerve, CN III, controls extraocular eye muscles. Lesion to the nerve may result in a misaligned eye (strabismus).
• Continue

Question 3

3. The accessory nerve is cranial nerve ______. Enter the correct Roman numeral.

Choices:

• XI

Answers:

• XI

Comments:

• Correct
• That's right! The accessory nerve is CN XI. It controls the trapezius and sternocleidomastoid muscles. Its lesion interferes with shoulder shrug and turning the head to the contralateral (opposite) side.
• Continue

Question 4

4. The olfactory nerve is cranial nerve ______. Enter the correct Roman numeral.

Choices:

• I

Answers:

• I

Comments:

• Correct
• That's right! The olfactory nerve, CN I, transmit sensory information from olfactory receptors to CNS, which are then perceived as smell. Lesion of CN I can result in anosmia.
• Continue

Question 5

5. The trochlear nerve is cranial nerve ______. Enter the correct Roman numeral.

Choices:

• IV

Answers:

• IV

Comments:

• Correct
• That's right! The trochlear nerve, CN IV, controls one extraocular eye muscle which functions to depress the adducted eye.
• Continue

Question 6

6. The optic nerve is cranial nerve ______. Enter the correct Roman numeral.

Choices:

• II

Answers:

• II

Comments:

• Correct
• That's right! The optic nerve is CN II. It transmits visual information gathered by photoreceptors in the retina.
• Continue

Question 7

7. The vestibulocochlear nerve is cranial nerve ______. Enter the correct Roman numeral.

Choices:

• VIII

Answers:

• VIII

Comments:

• Correct
• That's right! The vestibulocochlear nerve is CN VIII. This CN is responsible for our sense of balance and our hearing. It gathers information from receptors in the inner ear.
• Continue

Question 8

8. The abducens nerve is cranial nerve ______. Enter the correct Roman numeral.

Choices:

• VI

Answers:

• VI

Comments:

• Correct
• That's right! The abducens nerve, CN VI, innervates one extraocular eye muscle which functions to abduct the eye, i.e. look laterally.
• Continue

Question 9

9. The trigeminal nerve is cranial nerve ______. Enter the correct Roman numeral.

Choices:

• V

Answers:

• V

Comments:

• Correct
• That's right! The trigeminal nerve, CN V, provides sensory innervation to the skin of face. It contains three subdivisions: ophthalmic (V1), maxillary (V2), mandibular (V3). The mandibular division also contains motor fibres which control the muscles of mastication.
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Question 10

10. The vagus nerve is cranial nerve ______. Enter the correct Roman numeral.

Choices:

• X

Answers:

• X

Comments:

• Correct
• That's right! The vagus nerve, CN X, is a mixed nerve. It carries parasympathetic fibres that supply the thoracic and most of the abdominal viscera, it is sensory to the external auditory canal, the laryngopharynx and larynx, and motor to muscles of the pharynx (swallow) and larynx (speech).
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Question 11

11. Which cranial nerves control the position of the eye in the orbit?

Choices:

• abducens, CN VI
• trochlear, CN IV
• oculomotor, CN III
• vagus, CN X
• glossopharyngeal, CN IX
• optic, CN II
• trigeminal, CN V
• facial, CN VII

Answers:

• abducens, CN VI
• trochlear, CN IV
• oculomotor, CN III

Comments:

• Correct
• That's right! Oculomotor (CN III), trochlear (CN IV) and abducens (VI) nerves are all responsible for controlling extraocular eye muscles, muscles which position the eye in the orbit.
• Continue

Question 12

12. Which cranial nerve convey special senses?

Choices:

• vestibulocochlear, CN VIII
• olfactory, CN I
• optic, CN II
• hypoglossal, CN XI
• trochlear, CN IV
• abducens, CN VI
• trigeminal, CN V
• vagus, CN X

Answers:

• vestibulocochlear, CN VIII
• olfactory, CN I
• optic, CN II

Comments:

• Correct
• That's right! The olfactory (CN I), optic (CN II) and vestibulocochlear (CN VIII) nerves are cranial nerves that convey smell, vision, balance and hearing respectively.
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Question 15

15. Which one cranial nerve is general sensory to the face AND controls the muscles of mastication?

Choices:

• trigeminal, CN V
• hypoglossal, CN XII
• trochlear, CN IV
• abducens, CN VI
• vagus, CN X
• oculomotor, CN III
• accessory
• facial, CN VII

Answers:

• trigeminal, CN V

Comments:

• Correct
• That's right! The trigeminal nerve (CN V) provides general sensation to the face. One of its three divisions, the mandibular division, contain motor fibres that control muscles of mastication.
• Continue

Question 16

16. On protrusion, the patient’s tongue points to the left. Which cranial nerve lesion must you consider? Cranial nerve ___#___, the ______________ nerve, on the ____________ side. (3 answers; separate with one space each)

Choices:

• 12 hypoglossal left
• xii hypoglossal left

Answers:

• 12 hypoglossal left
• xii hypoglossal left

Comments:

• Correct
• That's right! A lesion of the hypoglossal nerve, CN XII, paralyzes the ipsilateral tongue. Because the non-paralyzed side dominates, on protrusion the tongue will point towards the weakened side.
• Continue

Question 17

17. Gagging occurs reflexively in response to the application of touch to the back of the pharynx. Which cranial nerve is responsible for the sensory arm of this reflex? Cranial nerve ____#_____, the _____________ nerve (2 answers; separate with one space)

Choices:

• 9 glossopharyngeal
• IX glossopharyngeal

Answers:

• 9 glossopharyngeal
• IX glossopharyngeal

Comments:

• Correct
• That's right! Cranial nerve IX, the glossopharyngeal nerve, is responsible for the sensory arm of the gag reflex.
• Continue

Question 18

18. The eyes blink reflexively in response to touch. Which cranial nerve is responsible for the sensory arm of this reflex? Cranial nerve __#__, the ____________ nerve. (2 answers; separate with one space)

Choices:

• V trigeminal
• 5 trigeminal

Answers:

• V trigeminal
• 5 trigeminal

Comments:

• Correct
• That's right! Cranial nerve V, the trigeminal nerve, is responsible for general sensory innervation of the face. The ophthalmic division provide sensory innervation to the forehead, upper eyelid, the contents of the orbit and the tip of the nose.
• Continue

Question 19

19. You walk into your granny’s kitchen and begin to salivate, as she’s been baking cookies all day. Which cranial nerve is responsible for the sensory arm of this reflex? Cranial nerve ____#_____, the _____________ nerve. (2 answers; separate with one space)

Choices:

• I olfactory
• 1 olfactory

Answers:

• I olfactory
• 1 olfactory

Comments:

• Correct
• That's right! As you walk into the kitchen, you smell the odor of freshly baked cookie, then you start to salivate. CN I, the olfactory nerve, transmits odorant sensory signal.
• Continue

Question 20

20. Gagging occurs reflexively in response to the application of touch to the back of the pharynx. Which cranial nerve is responsible for the motor arm of this reflex? Cranial nerve ____#_____, the _____________ nerve (2 answers; separate with one space)

Choices:

• X vagus
• 10 vagus

Answers:

• X vagus
• 10 vagus

Comments:

• Correct
• That's right! CN X, the vagus nerve, is responsible for the motor arm of the reflex. Vagus nerve is a mixed nerve, it contain motor fibres which control muscles of pharynx and larynx.
• Continue

Question 21

21. Which cranial nerve would be associated with a loss of taste on the posterior 1/3 of the right side of the tongue? Cranial nerve ___#__, the ________ nerve, on the _____________ side (3 answers; separate with one space each)

Choices:

• IX glossopharyngeal right
• 9 glossopharyngeal right

Answers:

• IX glossopharyngeal right
• 9 glossopharyngeal right

Comments:

• Correct
• That's right! CN IX, the glossopharyngeal nerve, is responsible for taste and general sensory innervation of the posterior 1/3 of the ipsilateral tongue. Lost of taste in this region on the right side indicates a lesion to CN IX on the right side.
• Continue

Question 22

22. A patient presents complaining of imbalance, falling to the right, and difficulty hearing while speaking on the phone with it up against her right ear. Which cranial nerve do you suspect might be involved? Cranial nerve _____#_____, the ___________ nerve on the ____________ side (3 answers; separate with one space each)

Choices:

• VIII vestibulocochlear right
• 8 vestibulocochlear right

Answers:

• VIII vestibulocochlear right
• 8 vestibulocochlear right

Comments:

• Correct
• That's right! The vestibulocochlear nerve, CN VIII, is involved in the special sensations of hearing and balance. Lesion of the nerve will cause ipsilateral deficits, a right side lesion will cause the patient to fall to the right and experience hearing loss in the right ear.
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Question 23

23. A patient presents with a hoarse voice. On examination, they demonstrate a sagging palate on the left. Which cranial nerve must you consider? Cranial nerve __#___, the _____ nerve, on the _____ side. (3 answers; separate with one space each)

Choices:

• X vagus left
• 10 vagus left

Answers:

• X vagus left
• 10 vagus left

Comments:

• Correct
• That's right! A lesion of the left CN X, vagus nerve, will result in a hoarse voice and dysphagia.
• Continue

Question 24

24. The eyes blink reflexively in response to touch. Which cranial nerve is responsible for the motor arm of this reflex? Cranial nerve ___#____, the ____________ nerve. (2 answers; separate with one space)

Choices:

• VII facial
• 7 facial

Answers:

• VII facial
• 7 facial

Comments:

• Correct
• That's right! The facial nerve, CN VII, controls the muscles of facial expression. These muscles allow us to close our eyes and mouth, etc.
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Question 25

25. You walk into your granny’s kitchen and begin to salivate, as she’s been baking cookies all day. Which cranial nerves are responsible for the motor arm of this reflex? Choose all that apply.

Choices:

• cranial nerve IX, the glossopharyngeal nerve
• cranial nerve VII, the facial nerve
• cranial nerve XII, the hypoglossal nerve.
• cranial nerve X, the vagus nerve
• cranial nerve V, the trigeminal nerve

Answers:

• cranial nerve IX, the glossopharyngeal nerve
• cranial nerve VII, the facial nerve

Comments:

• Correct
• That's right! Secretion from salivary glands, the sublingual, submandibular and parotid glands, are controlled by parasympathetic fibres from CN VII and CN IX.
• Continue

Question 26

26. You put your granny’s cookie in your mouth, but can’t taste it with the anterior 2/3 of your tongue on the left. Which cranial nerve do you suspect is not functioning properly? Cranial nerve __#___, the _____ nerve, on the _____ side. (3 answers; separate with one space)

Choices:

• VII facial left
• 7 facial left

Answers:

• VII facial left
• 7 facial left

Comments:

• Correct
• That's right! The facial nerve, CN VII, receives taste sensation from the anterior 2/3 of the tongue on the ipsilateral side (in this case, left).
• Continue