PCSD 313 Module IV Articulation and Resonance - Exam -3 Study guide Questions and Answers

PCSD 313 Module IV Articulation and Resonance -
Exam #3 Study guide Questions and Answers




1. There .are .4 .groups .of .articulatory .muscles:: .1.Muscles .of .the .Tongue
2. Muscles .of .the .Velopharyngeal .Mechanism
3. Muscles .of .Mastication
4. Muscles .of .Facial .Expression
2. Muscles . of . Facial . Expression: . 1.Orbicularis .Oris
2. Transverse . Muscles: . BR
3. Angular .Muscles: .ZLD
4. Vertical .Muscles: .LDM
5. Other: .FONP
3. Orbicularis .Oris .OO: .Primary .muscle .of .the .lips; .will .close .mouth .and .pucker .lips; .a .sphi
.Function .-

A. When .active, .it .closes .the .mouth .& .puckers .the .lips.
B. When .activated .with .other .muscles, .it .will .close .the .mouth .in .a .straight .line.

4. Transverse .Muscle: .Buccinator: .primary .muscle .of .the .cheek, .trumpeter .muscle.
.deepest .of .the .facial .muscles.

Origin: .on .the .pterygomandibular .ligament .(hamulus .to .the .last
.molar). .Course: .horizontally .& .anteriorly.

Insert: .its .fibers .decussate .[cross] .at .the .corners .of .the .oral .cavity .to .insert .into .OO.
. Function: .Draws .the .corners .of .the .mouth .laterally.


5. Transverse .Muscle: .Risorius: .Origin: .Fascia .covering .masseter
Course: .Horizontally .& .anteriorly. .Parallel .& .superficial .to .buccinator.
.Insert: .Skin .& .mucosa .at .corners .of .oral .cavity .[OO]

,Function: .Assists .in .drawing .corners .of .mouth .laterally.
6. Angular .Muscle: .Zygomatic .Major: .Origin: .Surface .of .Zygomatic .bone
. Course: .Inferiorly .& .medially

Insert: .OO .and .skin .at .corner .of .oral .cavity.
Function: .Draws .corners .of .mouth .superiorly .& .laterally .to .form .a .broad .smile.


7. Angular .Muscle: .Levator .Labii .Superior: .Origin: .Lower .margin .of .the .orbit .of .the .eye.
.Course: .Inferiorly

, . . .

. . . . . . .




8. Angular .Muscle: .Depressor .Labii .Inferior: .Origin: .Mandible, .just .lateral .to
.Course: .Superiorly .and .medially

Insert: .Lower .lip
Function: .Draws .lower .lip .down .inferiorly .and .laterally.
9. Vertical .Muscle: .Levator .Anguli .Oris: .Origin: .lateral .to .the .nasal .ala
.Course: .Inferiorly

Insert: .Into .OO .with .some .fibers .decussating .to .the .lower .lip
Function: .Draws .corners .of .the .oral .cavity .superiorly .& .aids .in .closing .the .lower .lip.
10. Vertical: .Depressor .Anguli .Oris: .Origin: .Mandible, .slightly .lateral .to .midline
.Course: . Superior

Insertion: .OO .with .some .fibers .crossing .to .upper .lip
Function: .Depresses .the .angle .of .the .lip .and .draw .the .upper .lip .down, .exposes .lower .teeth.
11. Vertical .Muscle: .Mentalis: .Origin: .Mental .tuberosity .of .the .mandible
.Course: . Superior

Insertion: .Some .fibers .insert .into .the .chin, .some .into .OO
Function: .Contraction .will .evert .the .lower .lip, .wrinkle .the .chin, .and .stitten .the .lower .lip .so .that .the .m
.in .a .line. .Frowning .muscle.


12. Frontalis: . thin, .quadrilateral .muscle.
• O: .Galea .Aponeurotica .(Dense .layer .of .fibrous .tissue .that .covers .the .upper .part .of .the .cranium
• C: .Inferiorly.
• I: .Subcutaneous .tissue .of .the .eyebrows.
• F: .Elevates .eyebrows .in .glancing .upward. .Expressions .of .surprise/fright. .Wrinkles .forehead.
13. Orbicularis .Oculi: .Ring-like .band .of .muscle .that .surrounds .the .eye. .It .is .a .sphincter .muscle.
• O: .Frontal .& .Maxillary .bone.
• C: .Completely .encircles .the .eyes.
• I: .Skin .of .the .eyelids .(upper .& .lower).
• F: .Blinking, .winking, .squinting, .forceful .closure .of .the .eyes.