Authors: George Enders, Ph.D., Department of Anatomy; Timothy Raveill, MD and John Hendren, MD, Class of '96 STRUCTURES OF MASTICATION 1. The part of the oral cavity between the teeth and cheeks is called the hyoid cisterna oral recess vestibule frenulum Correct. No, the answer is D. 2. The mucosa covering the gums (alveolar processes of the mandible and maxilla)is called frenula papilla gingiva uvula labia Very good. No, the answer is C. 3. The anterior tip of that portion of the mandible which projects into the infratemporal fossa is called the corniculate process coronoid process mental process cornu lingula Correct. No, the answer is B. 4. The lateral pterygoid muscle inserts at the _____, while the medial muscle inserts at the _____. medial aspect of the coronoid process; medial aspect of the angle of the mandible medial aspect of the angle of the mandible, medial aspect of the coronoid process medial aspect of the angle of the mandible; medial aspect of condylar process medial aspect of the neck of the condylar process, medial aspect of the angle of the mandible Correct. No, the answer is D. 5. The two tubercles on the internal aspect of the anterior of the mandible are the _____ and are for the insertions for the muscles mental spines, genioglossus mental spines, anterior digastric mental tubercles, genioglossus mental tubercles, geniohyoid mental foramina, genioglossus Very good. No, the answer is A. 6. The sphenomandibular ligament attaches to what part of the mandible coronoid process lingula angle mylohyoid line symphysis menti Very good. No, the answer is B. 7. What passes through the mandibular canal inferior alveolar artery lingual nerve inferior alveolar nerve A and C B and C Very good. No, the answer is D. 8. Characterize the relationship between the submandibular duct and the lingual nerve. the lingual nerve passes medial, inferior, then lateral to the submandibular duct to reach the tongue the lingual nerve passes lateral, inferior, then medial to the submandibular duct to reach the tongue the lingual nerve passes lateral, superior, then medial to the submandibular duct to reach the tongue the lingual nerve passes medial, superior, then lateral to the submandibular duct to reach the tongue they run PARALLEL, BUT NEVER CROSS Very good. No, the answer is B. 9. Which of the following is NOT a "muscle of mastication", but clinically inportant in proper chewing masseter temporalis buccinator medial pterygoid lateral pterygoid Correct. No, the answer is C. 10. Which muscle of mastication has two heads masseter temporalis medial pterygoid lateral pterygoid none Correct. No, the answer is D. 11. Which of the following is NOT innervated by the mandibular division of the trigeminal nerve (CN V3) temporalis and masseter medial and lateral pterygoids tensor tympani and tensor veli palatini anterior belly of digastric and mylohyoid stylohyoid and stylophraryngeus very good. No, the answer is E. 12. The buccinator is innervated by the ophthalmic nerve (CNV 1) maxillary nerve (CNV 2) mandibular nerve (CNV 3) facial nerve (CNVII) glossopharyngeal nerve (CNIX) Very good. No, the answer is D. 13. Which muscles meet at the pterygomandibular raphe? masseter and buccinator medial and lateral pterygoids superior pharyngeal constrictor and buccinator superior pharyngeal constrictor and masseter lateral pterygoid and buccinator Very good. No, the answer is C. 14. The articular tubercle of the temporomandibular joint is located _____ to the mandibular fossa lateral medial anterior posterior superior Correct. No, the answer is C. 15. Which is FALSE concerning the temporomandibular joint the articular disk is thinnest at the center the stylomandibular and sphenomandibular ligaments help to stabilize the joint there is a thick lateral ligament it is not surrounded by a capsule it can allow opening, closing, protrusion, retraction, and rotation of the mandible Correct. No, the answer is D. 16. Which of the following is NOT found in the infratemporal fossa otic ganglion medial pterygoid muscle lateral pterygoid muscle masseter muscle chorda tympani nerve Correct. No, the answer is D. 17. The maxillary artery in the infratemporal fossa can roughly be divided into three sections by the lateral pterygoid muscle (mandibular, pterygoid, pterygo-palatine). Which section is correctly paired with the structures it supplies 1st section (mandibular) supplies primarily muscles of mastication 2nd section (pterygoid) supplies the cranium, mandible and inner ear 3rd section (pterygopalatine) supplies primarily muscles of mastication 1st section (mandibular) enters bony canals to supply teeth, palate, and the infraorbital region 2nd section (pterygoid) supplies primarily muscles of mastication Very good. No, the answer is E. 18. Which is FALSE concerning the mandibular division of the trigeminal nerve(CN V3) it enters the infratemporal fossa through the foramen ovale its anterior branch is primarily motor to the muscles of mastication and buccinator its posterior branch is primarily sensory the posterior division supplies the mylohyoid and anterior digastric the sensory portion of the anterior division is called the buccal branch Very good. No, the answer is B. 19. TASTE from the anterior 2/3 of the tongue is carried by the _______ nerve chorda tympani, a branch of the mandibular (CN V3) chorda tympani, a branch of the facial (CN VII) lingual, a branch of the mandibular (CN V3) lingual, a branch of the facial (CN VII) glossopharyngeal (CN IX) Correct. No, the answer is B. 20. Parasympathetic fibers which synapse in the otic ganglion supply the sublingual gland parotid gland submandibular gland A and C A, B, and C Correct. No, the answer is B. 21. A "normal" adult mouth contains _____ permanent teeth 30 32 (32-4 wisdom teeth removed =28) 34 36 40 Correct. No, the answer is B. 22. From the root outward, the correct order of layers of the tooth is root, pulp, dentin, cementum or enamel root, dentin, pulp, cementum or enamel root, pulp, cementum, dentin or enamel root, cementum, pulp, dentin or enamel root, pulp, enamel, dentin or cementum Very good. No, the answer is A. 23. Which of the following is FALSE about the parotid gland/duct? the parotid duct pierces the buccinator the facial nerve (CN VII) is entwined within the gland the parotid duct opens into the vestibule at the parotid papilla the parotid duct pierces the masseter the parotid gland receives parasympathetic innervation from the otic ganglion Very good. No, the answer is D. 24. The greatest concentration of taste buds is found on the filiform papillae philtrum vallate papillae lingual tonsils filiform line Very good. No, the answer is C. 25. The division between the anterior 2/3 and the posterior 1/3 of the tongue is the sulcus limitans sulcus terminalis vallate papilla median central sulcus filiform line Correct. No, the answer is B. 26. Which is NOT a characteristic of intrinsic tongue muscles they are at rest when chewing or swallowing none attach to bone all are innervated by the hypoglossal nerve (CN XII) there are four intrinsic tongue muscles fibers overlap in a criss-cross pattern to allow a wide range of tongue movements Very good. No, the answer is A. 27. Which is NOT an extrinsic tongue muscle palatoglossus hyoglossus styloglossus lingula genioglossus Correct. No, the answer is D. 28. Choose the TRUE statement the hypoglossal nerve (CN XII) and lingual artery are both superficial to the hyoglossus muscle the hypoglossal nerve (CN XII) and lingual artery are both deep to the hyoglossus muscle the hypoglossal nerve (CN XII) is superficial to the hyoglossus muscle while the lingual artery is deep to the hyoglossus muscle the hypoglossal nerve (CN XII) is deep to the hyoglossus muscle while the lingual artery is superficial to it none of the above are true statements Very good. No, the answer is C. 29. Choose the FALSE statement concerning nerve supply to the tongue all motor supply to the tongue is carried by the hypoglossal nerve (CN XII) except to the palatoglossus general sensory from the anterior 2/3 of the tongue is carried by the lingual branch of the mandibular (CN V3) general sense from the posterior 1/3 of the tongue is carried by the facial nerve (CN VII) taste from the anterior 2/3 of the tongue is carried by the chorda tympani branch of the facial (CN VII) taste from the posterior 1/3 of the tongue is carried by the glossopharyngeal nerve (CN IX) Very good. No, the answer is C. 30. To perform an inferior alveolar nerve block for a mandibular tooth extraction, anesthetic should be injected through the mandibular notch into the infratemporal fossa near the mandibular foramen near the mental foramen near the angle of the mandible near the apical foramina around the tooth to be extracted Very good. No, the answer is B.