Anatomy Infratemporal Fossa Oral Cavity

45 Questions | By BLACKMD | Last updated: Mar 22, 2022 | Total Attempts: 493

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1.

To drain an abscess (a closed collection of pus) affecting the cheek area, an emergency room physician used local anesthesia for the surgery. Which of the following nerves must be anesthetized because it carries pain sensation from the cheek area?
- A.
  
  Buccal (V3)
- B.
  
  Buccal (VII)
- C.
  
  Inferior alveolar
- D.
  
  Lingual
- E.
  
  Mental
2.

A patient who experienced bilateral anterior dislocation of the jaw (temporomandibular joints) could not swallow or talk since the mouth was held open. What is the position of the condyles of the mandible as a result of the dislocation?
- A.
  
  Against the external acoustic meatus
- B.
  
  Against the anterior slope of the articular eminence
- C.
  
  Against the posterior slope of the articular eminence
- D.
  
  In the mandibular fossa
- E.
  
  In the pterygoid fossa
3.

In reducing an ankylosis of the TMJ, a surgeon provoked an intense hemorrhage by lacerating the artery coursing transversely just medial to the neck of the condyle. Which artery was involved in the accident?
- A.
  
  Buccal
- B.
  
  External carotid
- C.
  
  Maxillary
- D.
  
  Middle meningeal
- E.
  
  Superficial temporal
4.

The muscle which separates the submandibular triangle from the paralingual space is the:
- A.
  
  Digastric, posterior belly
- B.
  
  Hyoglossus
- C.
  
  Mylohyoid
- D.
  
  Stylohyoid
- E.
  
  Styloglossus
5.

The predominant muscle most associated with retraction of the mandible is the:
- A.
  
  Lateral pterygoid
- B.
  
  Masseter
- C.
  
  Medial pterygoid
- D.
  
  Temporalis
- E.
  
  Mylohyoid
6.

At the temporomandibular joint (TMJ), hinge movements occur between the:
- A.
  
  Condyle and articular eminence
- B.
  
  Articular disc and articular eminence
- C.
  
  Condyle and articular disc
- D.
  
  Articular disc and articular cavity
- E.
  
  Condyle and articular cavity
7.

A 38-year-old patient complained of acute dental pain. The attending dentist found penetrating dental caries (dental decay) affecting one of the mandibular molar teeth. Which nerve would the dentist need to anesthetize to work on that tooth?
- A.
  
  Lingual
- B.
  
  Inferior alveolar
- C.
  
  Buccal
- D.
  
  Mental
- E.
  
  Mylohyoid
8.

Incapacity to protrude the mandible indicates a dysfunction of which muscle?
- A.
  
  Anterior belly of digastric
- B.
  
  Buccinator
- C.
  
  Lateral pterygoid
- D.
  
  Mylohyoid
- E.
  
  Temporalis
9.

Damage to the facial nerve near the stylomastoid foramen would likely cause each of the following motor deficits EXCEPT:
- A.
  
  Paralysis of the buccinator muscle
- B.
  
  Inability to whistle
- C.
  
  Paralysis of the muscles that elevate the mandible
- D.
  
  Inability to close the lips
10.

The lesser petrosal nerve carries preganglionic parasympathetic fibers to the:
- A.
  
  Geniculate ganglion
- B.
  
  Otic ganglion
- C.
  
  Submandibular ganglion
- D.
  
  Ciliary ganglion
11.

What bony feature of the mandible can be used to find and palpate the facial artery?
- A.
  
  Oblique line
- B.
  
  Mental trigone
- C.
  
  Angle
- D.
  
  Premasseteric notch
12.

Which of the following suprahyoid muscles would be paralyzed if the inferior alveolar nerve were severed at its origin?
- A.
  
  Geniohyoid m.
- B.
  
  Hyoglossus m.
- C.
  
  Mylohyoid m.
- D.
  
  Stylohyoid m.
13.

Which nerve is endangered during surgical removal of an impacted third mandibular molar tooth?
- A.
  
  Hypoglossal n.
- B.
  
  Glossopharyngeal n.
- C.
  
  Inferior alveolar n.
- D.
  
  Lingual n.
14.

After the mandibular condyle is moved forward onto the articular eminence (e.g., by opening the mouth widely), what muscle can then retract the mandible?
- A.
  
  Superficial head of masseter m.
- B.
  
  Deep head of masseter m.
- C.
  
  Posterior part of temporalis m.
- D.
  
  Anterior part of temporalis m.
15.

Two nerves usually emerge from between the two heads of the lateral pterygoid muscle: the anterior deep temporal nerve and the:
- A.
  
  Masseteric n.
- B.
  
  Buccal n.
- C.
  
  Lingual n.
- D.
  
  Inferior alveolar n.
16.

The chorda tympani enters the infratemporal fossa after it exits the:
- A.
  
  Stylomastoid foramen
- B.
  
  Foramen spinosum
- C.
  
  Foramen lacerum
- D.
  
  Petrotympanic fissure
17.

Paralysis of which of the following muscles would impede retraction of the mandible?
- A.
  
  Buccinator
- B.
  
  Lateral pterygoid, lower portion
- C.
  
  Lateral pterygoid, upper (sphenomeniscus) portion
- D.
  
  Medial pterygoid
- E.
  
  Temporalis
18.

A cranial fracture through the foramen ovale that compresses the enclosed nerve, will have an effect on all muscles EXCEPT :
- A.
  
  Tensor tympani
- B.
  
  Masseter
- C.
  
  Buccinator
- D.
  
  Mylohyoid
- E.
  
  Temporalis
19.

Which muscle is also known as the sphenomeniscus?
- A.
  
  Inferior head of the lateral pterygoid
- B.
  
  Masseter
- C.
  
  Medial pterygoid
- D.
  
  Superior head of the lateral pterygoid
- E.
  
  Temporalis
20.

Forward movement of the condyle of the mandible during wide opening of the jaws is accomplished mainly by the:
- A.
  
  Anterior part of temporalis muscle
- B.
  
  Lateral pterygoid muscle
- C.
  
  Masseter muscle
- D.
  
  Medial pterygoid muscle
- E.
  
  Posterior part of the temporalis muscle
21.

To drill a mandibular tooth without causing undue pain, a dentist has injected an anesthetic into the space located between the medial pterygoid muscle and the mandible near the lingula. Given the nerves passing through the immediate vicinity of the injection site, where would one expect anesthesia in addition to the mandibular teeth?
- A.
  
  Back of tongue
- B.
  
  External ear
- C.
  
  Maxillary incisor teeth
- D.
  
  Skin of chin
- E.
  
  Upper lip
22.

The middle meningeal artery:
- A.
  
  Enters the skull through the foramen ovale
- B.
  
  Passes through a split in the trunk of the mandibular nerve (V3)
- C.
  
  Is typically a branch of the second part of the maxillary artery
- D.
  
  Supplies blood to the temporal lobe of the brain
- E.
  
  Usually arises deep to the neck of the mandible
23.

The surgical removal of a metastatic tumor in the infratemporal fossa caused an intense hemorrhage. The surgeon clamped the main source of arterial supply to the area, which is the:
- A.
  
  Internal carotid
- B.
  
  Lingual
- C.
  
  Maxillary
- D.
  
  Posterior auricular
- E.
  
  Superficial temporal
24.

In acute inflammation (arthritis) of the TMJ, the muscle most likely to be affected by the inflammatory process is the:
- A.
  
  Temporal
- B.
  
  Medial pterygoid
- C.
  
  Masseter
- D.
  
  Lateral pterygoid
25.

In explaining the pain caused by the drilling of a mandibular molar tooth crown to a freshman medical student, a dentist identified the nerve conducting the pain sensations as the:
- A.
  
  Lingual
- B.
  
  Mylohyoid
- C.
  
  Inferior alveolar
- D.
  
  Buccal