Head and Neck Muscles: Action Flashcards
This is the only muscle of the masticators to protrude the jaw
Lateral/ External Pterygoid
Determine the action of the fibers of the temporalis muscle:
- Closes jaw
- Retract Mandible
- Open Jaw
- Elevate Jaw
A. Anterior Fibers
B. Middle Fibers
C. Posterior Fibers
NOTE: Each number may have one or more answers.
- A
- B & C
- B & C
- A
These 2 muscles of mastication solely functions to close the jaw. Which muscles are they?
Medial/Internal Pterygoid and Masseter
Determine whether the following actions are produced by which muscle.
- elevates angle of mouth
- elevates upper lip
- pulls angle of mouth laterally
- everts upper lip
A. Zygomaticus major
B. Zygomaticus minor
C. Both
- A
- B
- A
- B
This muscle is activated whenever an individual fakes a smile.
Risorius
The ____ muscle wrinkles the skin of the superior nose
Procerus
Determine which action corresponds to the following muscles:
- depresses angle of mouth
- draws eyebrows downward & medially
- compresses the cheek
- depresses mandible and lower lip
- draws lower lip downward & laterally
A. Platysma
B. Buccinator
C. Depressor anguli oris
D. Corrugator supercilii
E. Depressor labii inferioris
- C
- D
- B
- A
- E
Determine which action corresponds to the following muscles:
- wrinkles skin of chin
- draws the scalp posteriorly to raise the
eyebrows & wrinkle brow - flares nostrils
- constrict nostrils
A. Levator labii superioris alaeque nasi
B. Mentalis
C. Depressor septi nasi
D. Frontalis
E. Nasalis
F. A & E
G. A, C, & E
- B
- D
- F
- E
What part of the orbicularlis oculi elevates the lower eyelid?
palpebral part
The orbicularis oris function to perform what 2 actions?
- closes mouth
- protrudes lips (puckering of lips)
This muscle tenses skin over lower neck and creates
ridges in the skin
Platysma
The action of the risorius muscle is to?
elevate angle of mouth laterally
This muscle draws medial eyebrow downward, creating a menacing expression
Procerus
The following are actions of the orbicularis oculi, EXCEPT:
A. squinting of the eye
B. depresses upper eyelid
C. elevates the lower eyelid
D. closes eye tightly
E. None of the above
E. None of the above
What muscle draws the scalp posteriorly to raise
the eyebrows & wrinkle the brow when surprised?
Occipitalis
The nasalis muscle only functions to flare the nostrils during ____?
forced respiration
The following are actions of the mentalis, EXCEPT:
A. elevation of lower lip
B. elevation of upper lip
C. everts lower lip
D. wrinkles skin of chin
E. None of the above
B. elevation of upper lip
TRUE OR FALSE: The levator labii superioris
alaeque nasi functions to elevate upper lip, flares nostrils and evert upper lip
True
This muscle only elevates and everts the upper lip.
Levator labii superioris
TRUE OR FALSE: The Depressor labii inferioris also functions to evert the lower lip
True.
This muscle contracts whenever an individual frowns.
Depressor anguli oris
NOTE: This functions to depress the angle of mouth
This muscle is also known as the thinker’s brow.
Corrugator supercilii
A pt shows ptosis on his (R) eye. As a knowledgeable PT, which muscle is expected to be paralyzed or weakened?
(R) Levator palpebrae superioris
NOTE: The muscle is responsible for elevating the upper eyelid.
TRUE OR FALSE: The SCM only acts to flex and rotate the head to the opposite side.
False.
Two muscles acting together extend head and flex neck; one muscle rotates head to opposite side
TRUE OR FALSE: Both anterior and posterior belly of the digastric muscle functions to depress the mandible or
elevate the hyoid bone
True
Determine which muscle is being described by the following actions:
- elevates hyoid bone
- elevates hyoid bone and depresses mandible
- elevates floor of mouth and hyoid bone or depresses mandible
A. Geniohyoid
B. Stylohyoid
C. Mylohyoid
- B
- A
- C
Determine which muscle is being described by the following actions:
- Depresses hyoid bone
- Depresses larynx
- Depresses hyoid bone or elevates larynx
A. Sternohyoid
B. Sternothyroid
C. Thyrohyoid
D. Both A & B
E. None
- A
- B
- C
Determine which muscle is being described by the following actions:
- Depresses hyoid bone
- Elevates first rib; laterally flexes and rotates cervical part of vertebral columns
3.Elevates second rib; laterally flexes and rotates cervical part of vertebral columns
A. Omohyoid Inferior belly
B. Omohyoid Superior belly
C. Scalenus Anterior
D. Scalenus Medius
E. Scalenus Posterior
F. Geniohyoid
G. Both A & B
H. Both C & D
I. Both D & E
- G
- H
- E
