Question 1

Where does the infraorbital nerve receive the posterior superior alveolar nerve in order to form the maxillary nerve?

Accepted Answer

The infraorbital nerve receives the posterior superior alveolar nerve in the pterygopalatine fossa, allowing it to form the maxillary nerve.

Question 2

Which of the following nerves carry pulpal sensations from the maxillary canine?

Accepted Answer

The anterior superior alveolar nerve is responsible for carrying pulpal sensations from the maxillary canine.

Question 3

During a dental procedure on the buccal surface of the maxillary molars, a patient reports discomfort in the buccal gingival tissue. Which of the following nerves carries this sensation to the brain?

Accepted Answer

B

Question 4

When a patient complains of pain associated with a burn caused by hot coffee on the anterior dorsal surface of the tongue, which of the following nerves transmits this pain?

Accepted Answer

The facial nerve, specifically through the chorda tympani branch, is responsible for transmitting taste and pain sensations from the anterior two-thirds of the tongue.

Question 5

During a surgical procedure on the posterior hard palate, which of the following nerves MUST be anesthetized to provide patient comfort?

Accepted Answer

The greater palatine nerve supplies the posterior hard palate and must be anesthetized to provide patient comfort during a surgical procedure in that area. The nasopalatine nerve supplies the anterior hard palate and incisive papilla. The posterior superior alveolar nerve supplies the molars, premolars, and maxillary sinus. The lesser palatine nerve supplies the soft palate.

Question 6

Which of the following nerves is NOT part of the maxillary division of the trigeminal nerve?

Accepted Answer

The buccal nerve is part of the mandibular division (V3) of the trigeminal nerve, not the maxillary division (V2).

Question 7

Discomfort from an infection of BOTH the frontal and ethmoidal sinuses would be associated with involvement of which of the following nerves?

Accepted Answer

The nasociliary nerve, a branch of the ophthalmic nerve, supplies sensory innervation to both the frontal and ethmoidal sinuses. Discomfort from an infection involving both sinuses would therefore indicate involvement of the nasociliary nerve. The facial nerve supplies motor innervation to the muscles of facial expression and is not involved in sinus pain. The frontal nerve supplies sensory innervation to the forehead and scalp but not the sinuses. The optic nerve is involved in vision and is unrelated to sinus pain.

Question 8

Which of the following effects is prevented on the target nerve during the administration of a local anesthetic agent?

Accepted Answer

Local anesthesia agents prevent the generation and propagation of the action potential in nerves, while other functions like resting potential, refractory period, and repolarization may still occur.

Question 9

Which of the following skull foramina are associated with the pathway of the seventh cranial nerve from the brain to the facial region?

Accepted Answer

The pathway of the seventh cranial nerve, also known as the facial nerve, involves passing through the internal acoustic meatus in the temporal bone of the skull and then exiting through the stylomastoid foramen located near the angle of the mandible. Therefore, the correct answer is D, which includes both the internal acoustic meatus and the stylomastoid foramen. None of the other answer choices include both of these foramina.

Question 10

Which of the following pair of nerves merges posterior to the mental foramen to form the inferior alveolar nerve?

Accepted Answer

The answer of Which of the following pair of nerves...

Question 11

Which of the following actions could result from involvement by the efferent part of the fifth cranial nerve?

Accepted Answer

The efferent part of the fifth cranial nerve (trigeminal nerve) is responsible for motor functions such as chewing.

Question 12

After administration of an inferior alveolar nerve block, the patient reports that the lingual gingival tissue of the mandibular premolars and molars is still sensitive. Which nerve provides sensation from the gingival tissue in this area?

Accepted Answer

The lingual nerve provides sensation to the lingual gingival tissue of the mandibular premolars and molars. If the patient reports persistent sensitivity in this area after administration of an inferior alveolar nerve block, it could indicate that the lingual nerve was not fully anesthetized.

Question 13

Which of the following structures are innervated by the motor fibers within the mandibular division of the trigeminal nerve?

Accepted Answer

The mandibular division of the trigeminal nerve supplies the muscles of mastication, including masseter, temporalis, and pterygoid muscles. It does not supply the tongue, sternocleidomastoid muscle, or submandibular salivary glands.

Question 14

Which of the following nerves listed below does NOT form the maxillary nerve in the pterygopalatine fossa?

Accepted Answer

The incisive nerve is a branch of the inferior alveolar nerve, which is part of the mandibular nerve, not the maxillary nerve.

Question 15

After a serious car accident, a fracture of the ramus of the mandible has damaged nerves within the mandibular canal. The tissue MOST likely to be affected by this nerve damage would be the

Accepted Answer

The mandibular teeth receive sensory innervation from nerves within the mandibular canal, so they are most likely to be affected by nerve damage within that canal. The tongue is innervated by the lingual nerve, which runs separately from the mandibular canal. The lingual alveolar mucosa is innervated by both the lingual nerve and the inferior alveolar nerve, but the latter is the nerve most likely affected by mandibular canal damage. The posterior buccal mucosa is innervated by the buccal nerve, which also runs separately from the mandibular canal.

Question 16

Which of the following associations of nerve to bony opening is INCORRECT?

Accepted Answer

The oculomotor nerve does not pass through the inferior orbital fissure, instead it passes through the superior orbital fissure. Therefore, the association between the oculomotor nerve and the inferior orbital fissure is incorrect.

Question 17

Which of the following structures is innervated by the vagus nerve?

Accepted Answer

The soft palate muscles, which include the palatoglossus, palatopharyngeus, and levator veli palatini, are innervated by the vagus nerve (specifically, the pharyngeal branch of the vagus nerve). The parotid salivary gland is innervated by the glossopharyngeal nerve, the floor of the mouth is innervated by the lingual nerve (a branch of the mandibular nerve), and the sternocleidomastoid muscle is innervated by the accessory nerve (cranial nerve XI).

Question 18

Which of the following nerve branches of the facial nerve supplies motor innervation to the buccinator, risorius, and upper lip muscles?

Accepted Answer

The buccal nerve branch of the facial nerve supplies motor innervation to the buccinator, risorius, and upper lip muscles. The temporal nerve branch supplies motor innervation to the frontalis and part of the orbicularis oculi muscle. The zygomatic nerve branch supplies motor innervation to the orbicularis oculi, zygomaticus major, and zygomaticus minor muscles. The mandibular nerve branch supplies motor innervation to the muscles of the lower lip and chin, as well as the buccinator and platysma muscles.

Question 19

Which of the following nerves communicates with the lingual nerve in the submandibular ganglion?

Accepted Answer

The Chorda tympani nerve communicates with the lingual nerve in the submandibular ganglion.

Question 20

Sympathetic and parasympathetic nerves are antagonistic to one another. BOTH nerve systems function as part of the somatic nervous system.

Accepted Answer

The first statement is true. The sympathetic and parasympathetic nerves are part of the autonomic nervous system (not the somatic nervous system) and are antagonistic to one another.

The second statement is false. While both the sympathetic and parasympathetic nerves are part of the autonomic nervous system, they are not part of the somatic nervous system. The somatic nervous system includes nerves that help control skeletal muscle movements and sensations, while the autonomic nervous system controls involuntary actions such as heart rate and digestion.

Quiz 8: Nervous System