SCID 243 - Quiz 3 - Parotid Gland & Face

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    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? 

    • Zygomaticus major
    • Orbicularis oris
    • Buccinator
    • Levator labii superioris
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About This Quiz

This quiz in 'SCID 243 - Quiz 3' focuses on the anatomical and functional aspects of the parotid gland and facial nerve. It tests knowledge on nerve functions, impacts of surgical interventions, and pain pathways, crucial for medical students and professionals.

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  • 2. 

    Which nerve carries postganglionic parasympathetic fibers to the parotid gland?

    • Auriculotemporal nerve

    • Lesser petrosal nerve

    • Glossopharyngeal nerve

    • Great auricular nerve

    • 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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  • 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? 

    • Maxillary (V2)

    • Greater auricular nerve

    • Ophthalmic (V1)

    • Mandibular (V3)

    • Facial (VII)

    • Facial (VII)

    Correct Answer
    A. 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. 

    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? 

    • Buccinator

    • Depressor anguli oris

    • Levator anguli oris

    • Levator labii superioris

    • Stylohyoid

    Correct Answer
    A. 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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  • 5. 

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

    • External jugular vein

    • Facial nerve

    • Glossopharyngeal nerve

    • Hypoglossal nerve

    • Lingual artery

    • Lingual artery

    Correct Answer
    A. 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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  • 6. 

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

    • Anterior belly of digastric

    • Buccinator

    • Medial pterygoid

    • Mylohyoid

    • Temporalis

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

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  • 7. 

    The parotid space contains all EXCEPT: ________

    • External carotid artery

    • Facial nerve

    • Intraparotid lymph nodes

    • Medial pterygoid muscle

    • Retromandibular vein

    Correct Answer
    A. 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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  • 8. 

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

    • Buccinator

    • Levator anguli oris

    • Levator labii superioris

    • Platysma

    • Zygomaticus major

    Correct Answer
    A. 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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  • 9. 

    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? 

    • Lingual

    • Superior thyroid

    • Facial

    • Ascending pharyngeal

    • Maxillary

    Correct Answer
    A. 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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  • 10. 

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

    • Facial

    • Great auricular

    • Chorda tympani

    • Deep temporal, posterior

    • Auriculotemporal

    • Auriculotemporal

    Correct Answer(s)
    A. Auriculotemporal
    A. 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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  • Current Version
  • Mar 18, 2023
    Quiz Edited by
    ProProfs Editorial Team
  • Oct 23, 2015
    Quiz Created by
    Permphan
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