Ch 28. Muscles of Mastication, Muscles and Sternocleidomastoid and Trapezius Muscles

(T/F) Retrusion of the mandible is a side-to-side movement

false

(T/F) The masseter muscle inserts in the medial side of the angle of the mandible

false

(T/F) The sternocleidomastoid (SCM) muscle elevates the shoulders in the shrugging movement

false

(T/F) The sternothyroid muscle originated on the thyroid cartilage and inserts on the sternum

false

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

d. both b and c

Which muscle has fibers that primarily run horizontally? a. masseter b. temporal c. medial pterygoid d. lateral pterygoid

d. lateral pterygoid

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

d. lateral pterygoid

Which infrahyoid muscle functions to elevate the layrnx? a. sternothyroid b. sternohyoid c. omohyoid d. thyrohyoid

d. thyrohyoid

Which muscle has two origins on the zygomatic arch? a. masseter b. lateral pterygoid c. medial pterygoid d. temporal

a. masseter

Which muscle forms the floor of the mouth? a. mylohyoid b. geniohyoid c. digastric d. stylohyoid

a. mylohyoid

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

b. lateral pterygoid

Which muscle does not aid in pulling down on the hyoid bone? a. omohyoid b. sternothyroid c. sternohyoid d. thryohyoid e. all function to pull down the hyoid bone

b. sternothyroid

Which muscle takes a small part of its origin from the maxillary tuberosity? a. masseter b. temporal c. medial pterygoid d. lateral pterygoid

c. medial pterygoid

Which muscle is not a suprahyoid muscle? a. geniohyoid b. stylohyoid c. thyrohyoid d. digastric

c. thyrohyoid

(T/F) All of the infrahyoid muscles are innervated by cervical nerves

true

(T/F) The SCM inserts into the mastoid process of the temporal bone

true

(T/F) The hyoid bone is connected to other bones only by muscles

true

(T/F) The sling like muscle that has an anterior and posterior belly is the digastric muscle

true

(T/F) The temporalis muscle is fan shaped

true

(T/F) The temporalis muscle is the only muscle of mastication that retrudes the mandible

true