SCID 243 - Quiz 3 - Parotid Gland & Face

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| By Permphan

Permphan

Community Contributor

Quizzes Created: 15 | Total Attempts: 28,387

Questions: 10 | Attempts: 251 | Updated: Mar 18, 2023

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Questions and Answers

1.

Loss of sensation from the temporal region and loss of secretory function of the parotid gland would be caused by interruption of which nerve?
- A.
  
  Facial
- B.
  
  Great auricular
- C.
  
  Chorda tympani
- D.
  
  Deep temporal, posterior
- E.
  
  Auriculotemporal
- F.
  
  Auriculotemporal
Correct Answer(s)
E. Auriculotemporal
F. Auriculotemporal

Explanation
The auriculotemporal nerve is a branch of the mandibular division of the trigeminal nerve (V3). It has two important functions: First, it carries postganglionic parasympathetic fibers to the parotid gland. These fibers come from the otic ganglia, where they synapsed with the presynaptic fibers from the glossopharyngeal nerve (CN IX). Second, the auriculotemporal nerve provides sensory innervation to the skin of anterosuperior ear, part of the external auditory meatus, and the temporomandibular joint.

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2.

During a face lift operation on a 48-year-old woman, the plastic surgeon inadvertently cut the marginal mandibular branch of the facial nerve. Which of the following muscles would be paralyzed because of the injury?
- A.
  
  Buccinator
- B.
  
  Depressor anguli oris
- C.
  
  Levator anguli oris
- D.
  
  Levator labii superioris
- E.
  
  Stylohyoid
Correct Answer
B. Depressor anguli oris

Explanation
The marginal mandibular branch of the facial nerve provides motor innervation to the muscles of facial expression near the lower lip and chin--right where you find depressor anguli oris.

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3.

An elderly woman complained of a severe pain, felt above the right eye radiating to the upper eyelid, side of the nose and forehead. Branches of which of the following nerves convey pain sensations from areas of the skin described?
- A.
  
  Maxillary (V2)
- B.
  
  Greater auricular nerve
- C.
  
  Ophthalmic (V1)
- D.
  
  Mandibular (V3)
- E.
  
  Facial (VII)
- F.
  
  Facial (VII)
Correct Answer
C. Ophthalmic (V1)

Explanation
The ophthalmic division of the trigeminal nerve provides sensory innervation to the skin of the nose, upper eyelid, and forehead. This is exactly where this woman feels pain, so the ophthalmic division of the trigeminal nerve must be the nerve transmitting the pain.

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4.

Due to multiple salivary calculi (stones) in the submandibular duct, the submandibular gland of a 45-year-old individual was surgically removed. What major artery directly related to the gland was of special concern to the surgeon?
- A.
  
  Lingual
- B.
  
  Superior thyroid
- C.
  
  Facial
- D.
  
  Ascending pharyngeal
- E.
  
  Maxillary
Correct Answer
C. Facial

Explanation
The facial artery arises from the external carotid and winds toward the inferior border of the mandible, crossing over the submandibular gland. So, if the submandibular gland was removed, the facial artery might be damaged.

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5.

Which nerve carries postganglionic parasympathetic fibers to the parotid gland?
- A.
  
  Auriculotemporal nerve
- B.
  
  Lesser petrosal nerve
- C.
  
  Glossopharyngeal nerve
- D.
  
  Great auricular nerve
- E.
  
  Marginal mandibular nerve
Correct Answer
A. Auriculotemporal nerve

Explanation
The auriculotemporal nerve is a branch of the mandibular division of the trigeminal nerve (V3). It has two important functions: First, it carries postganglionic parasympathetic fibers to the parotid gland. These fibers come from the otic ganglia, where they synapsed with the presynaptic fibers from the glossopharyngeal nerve (CN IX). These presynaptic fibers were carried to the otic ganglia by the lesser petrosal nerve. Second, the auriculotemporal nerve provides sensory innervation to the skin of anterosuperior ear, part of the external auditory meatus, and the temporomandibular joint.

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6.

A deep laceration of the face in the middle of the parotid gland could affect the:
- A.
  
  External jugular vein
- B.
  
  Facial nerve
- C.
  
  Glossopharyngeal nerve
- D.
  
  Hypoglossal nerve
- E.
  
  Lingual artery
- F.
  
  Lingual artery
Correct Answer
B. Facial nerve

Explanation
The facial nerve travels through the parotid gland--it could become injured if there was a deep laceration through the parotid gland. Two other structures found within the parotid gland which might be damaged: the retromandibular vein and the external carotid artery. The nerve is the most superficial structure in the gland. Then, the vein is under the nerve, and the artery is the deepest structure in the gland.

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7.

Which muscle will not be affected when the mandibular division of the trigeminal nerve (V3) is anesthetized?
- A.
  
  Anterior belly of digastric
- B.
  
  Buccinator
- C.
  
  Medial pterygoid
- D.
  
  Mylohyoid
- E.
  
  Temporalis
Correct Answer
B. Buccinator

Explanation
Buccinator is innervated by the facial nerve (CN VII).

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8.

While recovering from a right facial paralysis, a 36-year-old female patient complained that food accumulated between the teeth and the cheek mucosa when chewing. The deficiency of which muscle was most likely the cause of the chewing problem?
- A.
  
  Zygomaticus major
- B.
  
  Orbicularis oris
- C.
  
  Buccinator
- D.
  
  Levator labii superioris
Correct Answer
C. Buccinator

Explanation
Although buccinator is innervated by the buccal branches of the facial nerve and not a branch of V3, the buccinator is an important muscle for mastication. The buccinator keeps the cheek taut so it is not folding over and becoming injured by chewing. It aids mastication by pulling the cheek against the molar teeth so that food does not keep collecting in the vestibule of the mouth. So, if this muscle was injured, the cheek could not press against the molar teeth, and food would fall between the teeth and cheek mucosa while chewing.

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9.

The facial muscle most responsible for moving the lips both upward and laterally to produce a smile is:
- A.
  
  Buccinator
- B.
  
  Levator anguli oris
- C.
  
  Levator labii superioris
- D.
  
  Platysma
- E.
  
  Zygomaticus major
Correct Answer
E. Zygomaticus major

Explanation
Zygomaticus major is innervated by the zygomatic and buccal branches of the facial nerve. It elevates the corner of the mouth and draws it laterally. Remember zygomaticus major as the "smile" muscle! Levator anguli oris is close to the correct answer. This muscle, which is innervated by the facial nerve, elevates the corners of the mouth. However, zygomaticus major also draws the mouth laterally to produce a smile, so this answer is more correct.

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10.

The parotid space contains all EXCEPT: ________
- A.
  
  External carotid artery
- B.
  
  Facial nerve
- C.
  
  Intraparotid lymph nodes
- D.
  
  Medial pterygoid muscle
- E.
  
  Retromandibular vein
Correct Answer
D. Medial pterygoid muscle

Explanation
The medial pterygoid muscle is not in the parotid space. It serves as the anterior boundary of the parotid fossa. The other structures mentioned are all found within the parotid gland.

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Current Version
Mar 18, 2023

Quiz Edited by
ProProfs Editorial Team
Oct 23, 2015

Quiz Created by
Permphan

SCID 243 - Quiz 3 - Parotid Gland & Face

Loss of sensation from the temporal region and loss of secretory function of the parotid gland would be caused by interruption of which nerve?

During a face lift operation on a 48-year-old woman, the plastic surgeon inadvertently cut the marginal mandibular branch of the facial nerve. Which of the following muscles would be paralyzed because of the injury?

An elderly woman complained of a severe pain, felt above the right eye radiating to the upper eyelid, side of the nose and forehead. Branches of which of the following nerves convey pain sensations from areas of the skin described?

Due to multiple salivary calculi (stones) in the submandibular duct, the submandibular gland of a 45-year-old individual was surgically removed. What major artery directly related to the gland was of special concern to the surgeon?

Which nerve carries postganglionic parasympathetic fibers to the parotid gland?

A deep laceration of the face in the middle of the parotid gland could affect the:

Which muscle will not be affected when the mandibular division of the trigeminal nerve (V3) is anesthetized?

While recovering from a right facial paralysis, a 36-year-old female patient complained that food accumulated between the teeth and the cheek mucosa when chewing. The deficiency of which muscle was most likely the cause of the chewing problem?

The facial muscle most responsible for moving the lips both upward and laterally to produce a smile is:

The parotid space contains all EXCEPT: ________