Chapter 28 PDF

1. The temporal muscle has a very narrow origin. Contraction of the entire temporalis elevates the mandible. a. Both statements are true. b. The first statement is true; the second statement is false. c. The first statement is false; the second statement is true. d. Both statements are false. 2. Co...

1. The temporal muscle has a very narrow origin. Contraction of the entire temporalis elevates the mandible. a. Both statements are true. b. The first statement is true; the second statement is false. c. The first statement is false; the second statement is true. d. Both statements are false. 2. Contraction of only the posterior portion of the temporalis muscle retrudes the mandible because this action also depresses the mandible. a. Both the statement and the reason are correct and related. b. Both the statement and the reason are correct but are NOT related. c. The statement is correct, but the reason is NOT correct. d. The statement is NOT correct, but the reason is correct. e. NEITHER the statement NOR the reason is correct. 3. Muscles of mastication are innervated by the fifth cranial nerve because they develop from the first (mandibular) pharyngeal arch. a. Both the statement and the reason are correct and related. b. Both the statement and the reason are correct but are NOT related. c. The statement is correct, but the reason is NOT correct. d. The statement is NOT correct, but the reason is correct. e. NEITHER the statement NOR the reason is correct. 4. Hyoid muscles have a role in depressing the mandible. This includes the suprahyoid and the thyrohyoid muscles. a. Both statements are true. b. The first statement is true; the second statement is false. c. The first statement is false; the second statement is true. d. Both statements are false. 5. The hyoid bone, a portion of the zygomatic arch, is unusual because it articulates with no other bone. a. Both the statement and the reason are correct and related. b. Both the statement and the reason are correct but are NOT related. c. The statement is correct, but the reason is NOT correct. d. The statement is NOT correct, but the reason is correct. e. NEITHER the statement NOR the reason is correct. 6. Hyoid muscles located above the hyoid bone are called suprahyoid muscles. When contracted, most muscles of this group elevate the mandible. a. Both statements are true. b. The first statement is true; the second statement is false. c. The first statement is false; the second statement is true. d. Both statements are false. 7. During an extraoral examination, it is necessary to palpate beneath the sternothyroid muscle because enlarged lymph nodes may be lying against the internal jugular vein in the neck. a. Both the statement and the reason are correct and related. b. Both the statement and the reason are correct but are NOT related. c. The statement is correct, but the reason is NOT correct. d. The statement is NOT correct, but the reason is correct. e. NEITHER the statement NOR the reason is correct. 8. Which muscle of mastication does not have two origins? a. Medial pterygoid b. Lateral pterygoid c. Masseter d. Temporal 9. All muscles of mastication insert into the disk of the TMJ. Blood supply to these muscles comes from the maxillary artery, which is a branch of the carotid. a. Both statements are true. b. The first statement is true; the second statement is false. c. The first statement is false; the second statement is true. d. Both statements are false. 10. The lateral pterygoid performs each of the following actions upon the mandible EXCEPT one. Which one is the EXCEPTION? a. Depression b. Protrusion c. Retrusion d. Lateral movement 11. Innervation to the digastric muscle is unusual because it has two nerves supplying it. a. Both the statement and the reason are correct and related. b. Both the statement and the reason are correct but are NOT related. c. The statement is correct, but the reason is NOT correct. d. The statement is NOT correct, but the reason is correct. e. NEITHER the statement NOR the reason is correct. 12. The shape of the hyoid bone resembles a: a. Circle b. Straight line c. Triangle d. Horseshoe 13. The masseter muscle is probably the most powerful of muscles of suprahyoid group. When the masseter contracts, it elevates the mandible, which closes the mouth. a. Both statements are true. b. The first statement is true; the second statement is false. c. The first statement is false; the second statement is true. d. Both statements are false. 14. Each of the following is a muscle of the suprahyoid group EXCEPT one. Which one is the EXCEPTION? a. Digastric b. Geniohyoid c. Mylohyoid d. Thyrohyoid 15. Involuntary contraction and spasms of the sternomastoid and trapezius muscles can be caused by migraine headaches. Some malocclusions can also cause such spasms. a. Both statements are true. b. The first statement is true; the second statement is false. c. The first statement is false; the second statement is true. d. Both statements are false. 16. The mylohyoid muscle originates from the mylohyoid line on the medial surface of each side of the maxilla. The left and right muscles fuse into what is known as a raphe. a. Both statements are true. b. The first statement is true; the second statement is false. c. The first statement is false; the second statement is true. d. Both statements are false. ANS: C 17. Which muscle originates in the upper sternum and inserts into the thyroid cartilage? a. Sternohyoid b. Sternothyroid c. Thyrohyoid d. Sternocleidomastoid ANS: C 18. The larynx moves up and down during swallowing. The thyrohyoid muscle pulls the larynx down. a. Both statements are true. b. The first statement is true; the second statement is false. c. The first statement is false; the second statement is true. d. Both statements are false. 19. The mandible is elevated by each of the following EXCEPT one. Which one is the EXCEPTION? a. Medial pterygoid b. Masseter c. Geniohyoid d. Temporal 20. The floor of the mouth is formed by which muscle? a. Stylohyoid b. Geniohyoid c. Mylohyoid d. Digastric 21. The sternocleidomastoid muscle has an origin at the superior border of the scapula. When the muscle contracts it pulls the hyoid bone down. a. Both statements are true. b. The first statement is true; the second statement is false. c. The first statement is false; the second statement is true. d. Both statements are false. 22. The sternocleidomastoid muscle is innervated by which cranial nerve? a. Fifth b. Seventh c. Tenth d. Eleventh 23. If the left lateral pterygoid contracts, the mandible will move to the left because one of the lateral pterygoid muscles acting by itself accomplishes lateral excursion. a. Both the statement and the reason are correct and related. b. Both the statement and the reason are correct but are NOT related. c. The statement is correct, but the reason is NOT correct. d. The statement is NOT correct, but the reason is correct. e. NEITHER the statement NOR the reason is correct. 24. Which muscle of mastication fans out widely at its origin? a. Masseter b. Temporal c. Medial pterygoid d. Lateral pterygoid True/False Questions 1. The insertion of a muscle is attached to the more movable structure._______ 2. All muscles of mastication are attached to an area of the mandible._________ 3. The suprahyoid muscles are innervated by cranial nerves.________ 4. Muscles of mastication are innervated by the facial nerve._________  5. The suprahyoid and thyrohyoid muscles control laryngeal movements.______ 6. Spasms originating from the TMJ can be referred (as pain) to the sternocleidomastoid muscle (SCM)._____________ 11. Which muscle takes a small part of its origin from the maxillary tuberosity? a. Masseter b. Temporal c. Medial pterygoid d. Lateral pterygoid 12. Which of the following muscles has more than one site of origin? a. Masseter b. Medial pterygoid c. Lateral pterygoid d. Both b and c e. All of the above 13. Which of these muscles does not function to elevate the mandible and close the mouth? a. Masseter b. Temporal c. Medial pterygoid d. Lateral pterygoid 14. Which muscle has fibers that primarily run horizontally? a. Masseter b. Temporal c. Medial pterygoid d. Lateral pterygoid 15. Which muscle is not a suprahyoid muscle? a. Geniohyoid b. Stylohyoid c. Thyrohyoid d. Digastric 16. Which muscle does not aid in pulling down on the hyoid bone? a. Omohyoid b. Sternothyroid c. Sternohyoid d. Thyrohyoid e. All function to pull down the hyoid bone 17. Which infrahyoid muscle functions to elevate the larynx? a. Sternothyroid b. Sternohyoid c. Omohyoid d. Thyrohyoid 18. If there is a deviation of the mandible to one side during protrusion, which muscle is not functioning properly? a. Masseter b. Lateral pterygoid c. Medial pterygoid d. Temporal TRUE OR FALSE The temporalis muscle is the only muscle of mastication that retrudes the mandible.___________ The masseter muscle inserts into the medial side of the angle of the mandible.________________ All of the infrahyoid muscles are innervated by cervical nerves._______________ The temporalis muscle is fan shaped.________________ The sling like muscle that has an anterior and posterior belly is the digastric muscle._________ The sternothyroid muscle originates on the thyroid cartilage and inserts on the sternum._______________ Retrusion of the mandible is a side-to-side movement.____________ The hyoid bone is connected to other bones only by muscles.___________________ The sternocleidomastoid (SCM) muscle elevates the shoulders in the shrugging movement. The SCM inserts into the mastoid process of the temporal bone._______________ True-False Questions 15. Which of the following is not a bone of the viscerocranium? a. Sphenoid b. Maxilla c. Vomer d. Nasal e. They are all part of the viscerocranium. 16. The sella turcica is part of the: a. Styloid process b. Sphenoid bone c. Zygomatic process of mandible d. Posterior palatine process 17. Which of the following is not a process of the maxilla? a. Frontal b. Zygomatic c. Coronoid d. Alveolar 18. Another name for the chin is the mental spine. Posterior to the chin (bilaterally) is the mental foramen. a. Both statements are true. b. Both statements are false. c. The first statement is true; the second is false. d. The first statement is false; the second is true. 19. The mandibular foramen is located on the: a. Medial ramus of mandible b. Medial angle of mandible c. Floor of mandible d. Depression on lateral border of angle of mandible ______ 1. ______ 2. ______ 3. ______ 4. ______ 5. ______ 6. ______ 7. ______ 8. ______ 9. ______ 10. ______ 11. ______ 12. ______ 13. Genial tubercles are found on the lingual midline, just above the inferior border of the mandible. The mylohyoid line separates the submandibular fossa from the sublingual fossa. The mandibular lingula lies just posterior to the mandibular foramen. The rim of the orbit is made up of the frontal, maxillary, and zygomatic bones. The alveolar processes form the tooth sockets. The zygomatic process is formed from three bones: the maxilla, zygomatic, and temporal bones. The transverse palatine suture marks the articulation of the right and left palatine processes. The ethmoid bone forms most of the lateral wall of the orbit. The foramen ovale is located in the sphenoid bone. The maxilla is a single bone. There are 14 bones of the neurocranium. The coronoid notch is the depression between the coronoid process and the condyle. The mandible is made up of a body and four processes. Multiple-Choice Questions 14. Which of the following is not a bone of the neurocranium? a. Frontal b. Ethmoid c. Parietal d. Sphenoid e. They are all bones of the neurocranium.