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
