TEST BANK For Anatomy of Orofacial Structures, 9th Edition
2024 by Richard W. Brand, Verified Chapters 1 - 36, Complete
Newest Version
The temporal muscle is the only muscle of mastication that can retrude the
mandible. - ANSWER:True
The masseter muscle inserts into the medial side of the angle of the mandible. -
ANSWER:False.
The masseter inserts into the buccal/cheek side not the tongue side.
All of the infrahyoid muscles are innervated by cervical nerves. - ANSWER:True.
All are innervated by the ansa cervicalis from the cervical plexus (C1-C3) except the
thyrohyoid muscle, which is innervated by fibres only from the first cervical spinal
nerve travelling with the hypoglossal nerve.
The masseter is a fan shaped muscle. - ANSWER:False.
The temporal is a fan shape.
The sling-like muscle that has an anterior and posterior belly is the digastric muscle. -
ANSWER:True
The sternothyroid's origin is on the thyroid and its insertion is on the sternum. -
ANSWER:False
The opposite is true, Origin is sternum & Insertion is the thyroid.
Retrusion of the mandible is a side to side movement. - ANSWER:False.
The mandible is pulled back in retrusion.
The hyoid bone is connected to other bones by muscle only. - ANSWER:True
The sternocleidomastoid (SCM) muscle elevates the shoulders in a shrugging
movement. - ANSWER:False.
The trapezius muscle performs the shrugging shoulders movement. The SCM turns
and tilts the head.
The SCM inserts into the mastoid process of the temporal bone. - ANSWER:True.
Which of the muscles takes a small part of its origin from the maxillary tuberosity? -
ANSWER:C.
Medial Pterygoid
Which of the muscles has more than one origin? - ANSWER:E.
Masseter
Medial Pterygoid
, Lateral Pterygoid
Which of these muscles does not elevate the mandible to close the mouth? -
ANSWER:D.
Lateral Pterygoid
Which of these muscles has fibers that primarily run horizontally? - ANSWER:D.
Lateral Pterygoid
Which of these is not a suprahyoid muscle? - ANSWER:C.
Thyrohyoid
Which of these muscles does not aid in pulling down on the hyoid bone? -
ANSWER:E. (all of them do)
Omohyoid
Sternohyoid
Sternothyroid
Thyrohyoid
Which infrahyoid muscle is involved in elevating the larynx? - ANSWER:E. (none of
the above)
The larynx is raised by the Thyrohyoid.
If there is a deviation to one side during protrusion of the mandible, which muscle
isn't functioning properly? - ANSWER:B.
Lateral Pterygoid
Which muscle has two origins on the zygomatic arch? - ANSWER:A.
Masseter
Which muscle forms the floor of the mouth? - ANSWER:A.
Mylohyoid
Arthritis may affect the disc or the bony part of the TMJ. - ANSWER:True
The upper posterior lamina is collagenous and prevents the disc from being pulled
too far forward. - ANSWER:False.
The lamina is elastic and pulls backward on the disc.
The articular disc is tightly attached to the medial and lateral poles of the condyle. -
ANSWER:True
The anterior band of the disc is its thickest region. - ANSWER:False.
The posterior band is the thickest.
In the chewing motion, the mandible moves downward, then shifts toward the
nonchewing side. - ANSWER:False.
2024 by Richard W. Brand, Verified Chapters 1 - 36, Complete
Newest Version
The temporal muscle is the only muscle of mastication that can retrude the
mandible. - ANSWER:True
The masseter muscle inserts into the medial side of the angle of the mandible. -
ANSWER:False.
The masseter inserts into the buccal/cheek side not the tongue side.
All of the infrahyoid muscles are innervated by cervical nerves. - ANSWER:True.
All are innervated by the ansa cervicalis from the cervical plexus (C1-C3) except the
thyrohyoid muscle, which is innervated by fibres only from the first cervical spinal
nerve travelling with the hypoglossal nerve.
The masseter is a fan shaped muscle. - ANSWER:False.
The temporal is a fan shape.
The sling-like muscle that has an anterior and posterior belly is the digastric muscle. -
ANSWER:True
The sternothyroid's origin is on the thyroid and its insertion is on the sternum. -
ANSWER:False
The opposite is true, Origin is sternum & Insertion is the thyroid.
Retrusion of the mandible is a side to side movement. - ANSWER:False.
The mandible is pulled back in retrusion.
The hyoid bone is connected to other bones by muscle only. - ANSWER:True
The sternocleidomastoid (SCM) muscle elevates the shoulders in a shrugging
movement. - ANSWER:False.
The trapezius muscle performs the shrugging shoulders movement. The SCM turns
and tilts the head.
The SCM inserts into the mastoid process of the temporal bone. - ANSWER:True.
Which of the muscles takes a small part of its origin from the maxillary tuberosity? -
ANSWER:C.
Medial Pterygoid
Which of the muscles has more than one origin? - ANSWER:E.
Masseter
Medial Pterygoid
, Lateral Pterygoid
Which of these muscles does not elevate the mandible to close the mouth? -
ANSWER:D.
Lateral Pterygoid
Which of these muscles has fibers that primarily run horizontally? - ANSWER:D.
Lateral Pterygoid
Which of these is not a suprahyoid muscle? - ANSWER:C.
Thyrohyoid
Which of these muscles does not aid in pulling down on the hyoid bone? -
ANSWER:E. (all of them do)
Omohyoid
Sternohyoid
Sternothyroid
Thyrohyoid
Which infrahyoid muscle is involved in elevating the larynx? - ANSWER:E. (none of
the above)
The larynx is raised by the Thyrohyoid.
If there is a deviation to one side during protrusion of the mandible, which muscle
isn't functioning properly? - ANSWER:B.
Lateral Pterygoid
Which muscle has two origins on the zygomatic arch? - ANSWER:A.
Masseter
Which muscle forms the floor of the mouth? - ANSWER:A.
Mylohyoid
Arthritis may affect the disc or the bony part of the TMJ. - ANSWER:True
The upper posterior lamina is collagenous and prevents the disc from being pulled
too far forward. - ANSWER:False.
The lamina is elastic and pulls backward on the disc.
The articular disc is tightly attached to the medial and lateral poles of the condyle. -
ANSWER:True
The anterior band of the disc is its thickest region. - ANSWER:False.
The posterior band is the thickest.
In the chewing motion, the mandible moves downward, then shifts toward the
nonchewing side. - ANSWER:False.
