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?
buccal (V3) buccal (VII) inferior alveolar lingual mental
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?
against the external acoustic meatus against the anterior slope of the articular eminence against the posterior slope of the articular eminence in the mandibular fossa in the pterygoid fossa
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?
Buccal External carotid Maxillary Middle meningeal Superficial temporal
The muscle which separates the submandibular triangle from the paralingual space is the:
Digastric, posterior belly Hyoglossus Mylohyoid Stylohyoid Styloglossus
The predominant muscle most associated with retraction of the mandible is the:
lateral pterygoid masseter medial pterygoid temporalis mylohyoid
At the temporomandibular joint (TMJ), hinge movements occur between the:
condyle and articular eminence articular disc and articular eminence condyle and articular disc articular disc and articular cavity condyle and articular cavity
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?
Lingual Inferior alveolar Buccal Mental Mylohyoid
Incapacity to protrude the mandible indicates a dysfunction of which muscle?
Anterior belly of digastric Buccinator Lateral pterygoid Mylohyoid Temporalis
Damage to the facial nerve near the stylomastoid foramen would likely cause each of the following
motor deficits EXCEPT:
Paralysis of the buccinator muscle Inability to whistle Paralysis of the muscles that elevate the mandible Inability to close the lips
The lesser petrosal nerve carries preganglionic parasympathetic fibers to the:
Geniculate ganglion Otic ganglion Submandibular ganglion Ciliary ganglion
What bony feature of the mandible can be used to find and palpate the facial artery?
Oblique line Mental trigone Angle Premasseteric notch
Which of the following suprahyoid muscles would be paralyzed if the inferior alveolar nerve were
severed at its origin?
Geniohyoid m. Hyoglossus m. Mylohyoid m. Stylohyoid m.
Which nerve is endangered during surgical removal of an impacted third mandibular molar tooth?
Hypoglossal n. Glossopharyngeal n. Inferior alveolar n. Lingual n.
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?
Superficial head of masseter m. Deep head of masseter m. Posterior part of temporalis m. Anterior part of temporalis m.
Two nerves usually emerge from between the two heads of the lateral pterygoid muscle: the anterior
deep temporal nerve and the:
Masseteric n. Buccal n. Lingual n. Inferior alveolar n.
The chorda tympani enters the infratemporal fossa after it exits the:
Stylomastoid foramen Foramen spinosum Foramen lacerum Petrotympanic fissure
Paralysis of which of the following muscles would impede retraction of the mandible?
Buccinator Lateral pterygoid, lower portion Lateral pterygoid, upper (sphenomeniscus) portion Medial pterygoid Temporalis
A cranial fracture through the foramen ovale that compresses the enclosed nerve, will have an effect on all muscles EXCEPT :
Tensor tympani Masseter Buccinator Mylohyoid Temporalis
Which muscle is also known as the sphenomeniscus?
Inferior head of the lateral pterygoid Masseter Medial pterygoid Superior head of the lateral pterygoid Temporalis
Forward movement of the condyle of the mandible during wide opening of the jaws is accomplished mainly by the:
anterior part of temporalis muscle lateral pterygoid muscle masseter muscle medial pterygoid muscle posterior part of the temporalis muscle
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?
back of tongue external ear maxillary incisor teeth skin of chin upper lip
The middle meningeal artery:
enters the skull through the foramen ovale passes through a split in the trunk of the mandibular nerve (V3) is typically a branch of the second part of the maxillary artery supplies blood to the temporal lobe of the brain usually arises deep to the neck of the mandible
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:
Internal carotid Lingual Maxillary Posterior auricular Superficial temporal
In acute inflammation (arthritis) of the TMJ, the muscle most likely to be affected by the inflammatory process is the:
Temporal Medial pterygoid Masseter Lateral pterygoid
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:
Lingual Mylohyoid Inferior alveolar Buccal
The temporomandibular joint is characterized by all EXCEPT:
A capsule strengthened by ligaments on its lateral side only A completely flat surface for its gliding action An articular disc Extracapsular ligaments Two joint cavities of different shapes
In dislocation of the jaw, displacement of the articular disc beyond the articular tubercle of the temporomandibular joint results from excessive contraction of which muscle?
Buccinator Lateral pterygoid Medial pterygoid Masseter Temporalis
Sympathetic fibers reach the tongue by way of the:
lingual nerve maxillary artery hypoglossal nerve lingual artery glossopharyngeal nerve
After a radiograph revealed a sialolith (stone) in a patient's right submandibular duct, the surgeon
exposed the duct via an intraoral approach. In this approach, what tissues or structures must be cut
Mucous membrane only Mucous membrane and genioglossus muscle Mucous membrane and mylohyoid muscle Mucous membrane and hyoglossus muscle
Damage of the lingual nerve before it is joined by the chorda tympani in the infratemporal fossa would cause loss of:
general sensation to the anterior two thirds of the tongue general sensation to the posterior one third of the tongue secretion of the submandibular gland taste sensation from the anterior two thirds of the tongue taste sensation from the posterior one third of the tongue
The teeth and gums separate the oral cavity proper from the:
Nasal cavity Oral vestibule Oropharynx Paralingual space Submandibular space
Description for the following questions: Examination of a patient with an ulcerative carcinoma of the posterior third of the tongue revealed bleeding from the lesion and difficulty swallowing (dysphagia).
The bleeding was seen to be arterial; which of the following arteries was involved?
Deep lingual Dorsal lingual Facial Sublingual Tonsillar
The difficulty in swallowing was due to involvement of which muscle that elevates the tongue?
Genioglossus Hyoglossus Styloglossus Stylohyoid Stylopharyngeus
Cutting of the hypoglossal nerve in the hypoglossal canal would not interrupt the nerve supply to the:
Hyoglossus muscle Genioglossus muscle Palatoglossus muscle Styloglossus muscle
The contents of the paralingual space do NOT include the:
Hypoglossal nerve Lingual artery Lingual nerve Submandibular gland Sublingual gland
A patient is unable to taste a piece of sugar placed on the anterior part of the tongue. Which cranial
nerve is most likely to have a lesion?
Facial nerve Glossopharyngeal nerve Hypoglossal nerve Trigeminal nerve Vagus nerve
The chorda tympani contains which component before it joins the lingual nerve?
Preganglionic sympathetics Postganglionic sympathetics Preganglionic parasympathetics Postganglionic parasympathetics Taste fibers to the posterior third of the tongue
The cell bodies of the taste fibers from the anterior two-thirds of the tongue are located in the:
Geniculate ganglion Otic ganglion Pterygopalatine ganglion Submandibular ganglion Trigeminal ganglion
Which of the following structures is located in the vestibule of the oral cavity?
Tongue Opening of the parotid duct Opening of the submandibular duct Sublingual fold Uvula
When one presses the tongue tip against the anterior (incisor) teeth, which of the following muscles must contract?
Styloglossus Hyoglossus Genioglossus Superior longitudinal Verticalis
The muscle responsible for raising the floor of the mouth in the early stages of swallowing is the:
genioglossus geniohyoid hyoglossus mylohyoid palatoglossus
The cell bodies of the postganglionic parasympathetic neurons innervating the sublingual gland are found in which of the following ganglia?
ciliary otic submandibular superior cervical trigeminal
A 46-year-old female patient comes to the emergency department complaining of pain in the area just below her mandible on the right side of her face. She says that the pain is particularly severe when she eats. The area of the submandibular gland is tender and swollen, as is the area in the floor of her mouth lateral to the tongue. You suspect a stone in the submandibular duct, and a plain film radiograph shows a density in that region consistent with a stone. In order to remove the stone, the duct must be incised in the floor of the mouth. What nerve, that loops around the duct, is in danger in such an incision?
Chorda Tympani Glossopharyngeal Hypoglossal Internal branch of the superior laryngeal Lingual
In accessing the submandibular gland in the submandibular triangle, what vessel coursing through the gland and triangle would need to be protected?
External jugular vein Facial artery Maxillary artery Retromandibular vein Superior thyroid artery
All of the following may be found in the paralingual space EXCEPT:
Hypoglossal nerve Lingual nerve Sublingual gland Submandibular gland duct Superficial lobe of the submandibular gland