PMU TEST UPDATED ACTUAL COMPREHENSIVE
STUDY GUIDE 2026
◉ Corrugator supercilii muscle.
Answer: Produces a frown in the eye brow and forehead.
is underneath the orbicularis oculi and it draws the eyebrows
together and down. Enters at the center of each brow. Works with
the depressor supercilii and and the procerus.
● Origin: Supraorbital
ridge
● Insertion:
Forehead skin
Frowning muscles of the forehead. Can have an effect on wrinkles.
◉ Procerus muscle.
Answer: originates in the fascia of the nasal bone and
cartilage and runs through the area of the root of the nose. It then
fans upward to insert in the skin at the center of the forehead
between the brows. It pulls the center of the forehead down forming
transverse wrinkles.
○ Works with corrugator and/or orbicularis oculi and/or the nasal
part of the levator labii superioris.
,◉ Quadratus labii superioris.
Answer: Can be called the levator labii superioris muscle or the the
quadratus labii.
○ Contributes to facial expression and movement of the lips.
Lifts the angle of the mouth and aids the caninus in generating the
nasolabia furrow.
○ Origin: chin part of mandible
○ Insertion: skin and muscles of the lower lip
◉ Caninus muscle.
Answer: the levator anguli oris (caninus) is a facial
muscle of the mouth arising from the canine fossa, immediately
below the infraorbital foramen. Pulls the corner of the lip up in a
almost vertical direction, sharply angling the corners up in a kinda
os smile.
○ Origin: Maxilla
○ Insertion: corner of the mouth (Modiolus)
◉ Nasalis muscle.
Answer: sphincter muscle. Flares nostrils. Has two
parts.
○ Alar part: Depresses ala laterally, dilates nostrils
,■ Insertion: greater alar cartilage
■ Origin: maxilla
○ Transverse part:
■ Insertion: incisive fossa
■ Origin: maxilla
◉ zygomaticus major.
Answer: It extends from each zygomatic arch (cheekbone) to the
corners of the mouth. It is a muscle of facial expression which draws
the angle of the mouth superiorly and posteriorly to allow one to
smile.
○ Origin: anterior of zygomatic
○ Insertion: modiolus of the mouth
◉ masseter muscle.
Answer: The masseter is one of the muscles of
mastication. To chew food, associated with angry and aggressive
states. It is a powerful superficial quadrangular muscle
○ Origin: zygomatic arch
○ Insertion: along the angle and lateral surface of the
mandibular ramus
◉ buccinator muscle.
, Answer: muscle is the major facial
muscle underlying the cheek. It holds the cheek to the teeth and
assists with chewing. Keeping food in the mouth. Wind instruments,
called "trumpet muscle"
In lip procedure rest hand in upper jaw area.
○ Origin: from the alveolar processes of maxilla ...
○ Insertion: in the fibers of the orbicularis oris
◉ Triangularis muscle.
Answer: The depressor anguli oris muscle
(triangularis muscle) is a facial muscle. It is associated
with frowning, as it depresses the corner of the
mouth into a inverted U.
○ Origin: the mandible
○ Insertion: the angle of the mouth
◉ Quadratus (levator) labii superioris alaeque nasi muscle.
Answer: the "snarling" muscle. Translated from Latin: the "lifter of
both the upper lip and of the wing of the nose".
○ Origin: Nasal bone
○ Insertion: Nostril and upper lip
STUDY GUIDE 2026
◉ Corrugator supercilii muscle.
Answer: Produces a frown in the eye brow and forehead.
is underneath the orbicularis oculi and it draws the eyebrows
together and down. Enters at the center of each brow. Works with
the depressor supercilii and and the procerus.
● Origin: Supraorbital
ridge
● Insertion:
Forehead skin
Frowning muscles of the forehead. Can have an effect on wrinkles.
◉ Procerus muscle.
Answer: originates in the fascia of the nasal bone and
cartilage and runs through the area of the root of the nose. It then
fans upward to insert in the skin at the center of the forehead
between the brows. It pulls the center of the forehead down forming
transverse wrinkles.
○ Works with corrugator and/or orbicularis oculi and/or the nasal
part of the levator labii superioris.
,◉ Quadratus labii superioris.
Answer: Can be called the levator labii superioris muscle or the the
quadratus labii.
○ Contributes to facial expression and movement of the lips.
Lifts the angle of the mouth and aids the caninus in generating the
nasolabia furrow.
○ Origin: chin part of mandible
○ Insertion: skin and muscles of the lower lip
◉ Caninus muscle.
Answer: the levator anguli oris (caninus) is a facial
muscle of the mouth arising from the canine fossa, immediately
below the infraorbital foramen. Pulls the corner of the lip up in a
almost vertical direction, sharply angling the corners up in a kinda
os smile.
○ Origin: Maxilla
○ Insertion: corner of the mouth (Modiolus)
◉ Nasalis muscle.
Answer: sphincter muscle. Flares nostrils. Has two
parts.
○ Alar part: Depresses ala laterally, dilates nostrils
,■ Insertion: greater alar cartilage
■ Origin: maxilla
○ Transverse part:
■ Insertion: incisive fossa
■ Origin: maxilla
◉ zygomaticus major.
Answer: It extends from each zygomatic arch (cheekbone) to the
corners of the mouth. It is a muscle of facial expression which draws
the angle of the mouth superiorly and posteriorly to allow one to
smile.
○ Origin: anterior of zygomatic
○ Insertion: modiolus of the mouth
◉ masseter muscle.
Answer: The masseter is one of the muscles of
mastication. To chew food, associated with angry and aggressive
states. It is a powerful superficial quadrangular muscle
○ Origin: zygomatic arch
○ Insertion: along the angle and lateral surface of the
mandibular ramus
◉ buccinator muscle.
, Answer: muscle is the major facial
muscle underlying the cheek. It holds the cheek to the teeth and
assists with chewing. Keeping food in the mouth. Wind instruments,
called "trumpet muscle"
In lip procedure rest hand in upper jaw area.
○ Origin: from the alveolar processes of maxilla ...
○ Insertion: in the fibers of the orbicularis oris
◉ Triangularis muscle.
Answer: The depressor anguli oris muscle
(triangularis muscle) is a facial muscle. It is associated
with frowning, as it depresses the corner of the
mouth into a inverted U.
○ Origin: the mandible
○ Insertion: the angle of the mouth
◉ Quadratus (levator) labii superioris alaeque nasi muscle.
Answer: the "snarling" muscle. Translated from Latin: the "lifter of
both the upper lip and of the wing of the nose".
○ Origin: Nasal bone
○ Insertion: Nostril and upper lip
