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Chapter 04: Muscular System

Illustrated Anatomy of the Head and Neck 5th Edition by Margaret J. Fehrenbach

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Chapter 04: Muscular System

 

Complete Chapter Questions With Answers

 

Sample Questions Are Posted Below

 

MULTIPLE CHOICE

 

  1. The ______ of a muscle is generally attached to the LEAST movable structure.
a. insertion
b. origin
c. middle
d. beginning

 

 

ANS:  B

 

  Feedback
A The insertion of a muscle is generally attached to the more movable structure.
B The origin of a muscle is generally attached to the least movable structure.
C The insertion is the end of a muscle attached to the more movable structure.
D The insertion is the end of a muscle attached to the more movable structure.

 

 

DIF:    Recall             REF:   p. 92              OBJ:   3

TOP:   CDA: General Chairside, I. A. Demonstrate understanding of basic oral and dental anatomy, physiology, and development

MSC:  NBDHE, Scientific Basis for Dental Hygiene Practice, 1.1.1 Head and Neck Anatomy

 

  1. Which of the following muscles originates on the inferior border of the mandible and inserts at each of the labial commissures?
a. Levator anguli oris muscle
b. Depressor labii inferioris muscle
c. Depressor anguli oris muscle
d. Orbicularis oris muscle

 

 

ANS:  C

 

  Feedback
A The levator anguli oris muscle originates on the canine fossa of the maxilla and inserts into each labial commissure, elevating the labial commissure.
B The depressor labii inferioris muscle inserts into the skin of the lower lip.
C The depressor anguli oris muscle originates on the inferior border of the mandible. It inserts into each labial commissure and pulls each labial commissure down.
D The orbicularis oris muscle encircles the mouth.

 

 

DIF:    Recall             REF:   p. 101            OBJ:   2 | 3

TOP:   CDA: General Chairside, I. A. Demonstrate understanding of basic oral and dental anatomy, physiology, and development

MSC:  NBDHE, Scientific Basis for Dental Hygiene Practice, 1.1.1 Head and Neck Anatomy

 

  1. Which of the following muscles is NOT considered a suprahyoid muscle?
a. Digastric muscle
b. Mylohyoid muscle
c. Stylohyoid muscle
d. Sternothyroid muscle

 

 

ANS:  D

 

  Feedback
A The digastric muscle has two bellies; one that is an anterior and one that is a posterior suprahyoid muscle. The anterior belly originates on a tendon on the body of the hyoid bone and inserts onto the mandibular symphysis on the medial surface of the mandible. The posterior belly originates on the mastoid notch and inserts into the intermediate tendon on the hyoid bone.
B The mylohyoid muscle is a suprahyoid muscle that forms the floor of the mouth. It originates on the mylohyoid line of the mandible and inserts medially into the opposite mylohyoid muscle and onto the hyoid bone.
C The stylohyoid muscle is a suprahyoid muscle that originates on the styloid process and inserts onto the hyoid bone.
D The sternothyroid muscle is located inferior to the hyoid bone. It originates on the sternum and inserts into the thyroid gland and cartilage.

 

 

DIF:    Recall             REF:   p. 107            OBJ:   2 | 3

TOP:   CDA: General Chairside, I. A. Demonstrate understanding of basic oral and dental anatomy, physiology, and development

MSC:  NBDHE, Scientific Basis for Dental Hygiene Practice, 1.1.1 Head and Neck Anatomy

 

  1. Which of the following muscles raises each labial commissure of the lips to contribute to a patient’s smile?
a. Zygomaticus major muscle
b. Buccinator muscle
c. Platysma muscle
d. Epicranius muscle

 

 

ANS:  A

 

  Feedback
A The zygomaticus major muscle elevates each labial commissure and pulls it laterally. It originates on the zygomatic bone and inserts into each labial commissure.
B The buccinator muscle forms the anterior part of the cheek and lateral wall of the oral cavity. It pulls each labial commissure laterally and compresses the cheek to force food onto the occlusal table during chewing.
C The platysma muscle is located inferior to the mouth and acts to pull each labial commissure down.
D The epicranius muscle is located within the scalp area and does NOT insert into either labial commissure.

 

 

DIF:    Comprehension                               REF:   p. 101             OBJ:   3

TOP:   CDA: General Chairside, I. A. Demonstrate understanding of basic oral and dental anatomy, physiology, and development

MSC:  NBDHE, Scientific Basis for Dental Hygiene Practice, 1.1.1 Head and Neck Anatomy

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