Podcast
Questions and Answers
What is the action of the Zygomaticus Major muscle?
What is the action of the Zygomaticus Major muscle?
- Raise the skin of the chin and protrude the lower lip
- Draw the angle of the mouth downward and outward
- Close and protrude the lips
- Draw the angle of the mouth upward and outward (correct)
Which muscle is responsible for raising the skin of the chin?
Which muscle is responsible for raising the skin of the chin?
- Risorius
- Mentalis (correct)
- Depressor anguli Oris
- Buccinator
What is the primary function of the Orbicularis Oris muscle?
What is the primary function of the Orbicularis Oris muscle?
- Press the cheeks against the teeth
- Close and protrude the lips (correct)
- Raise and protrude the upper lip
- Draw the angle of the mouth backward
Which muscle action involves the movement of the lower jaw sideways?
Which muscle action involves the movement of the lower jaw sideways?
What action is performed by the Depressor Labii Inferioris muscle?
What action is performed by the Depressor Labii Inferioris muscle?
What action does the frontalis muscle perform?
What action does the frontalis muscle perform?
Which muscle is engaged when pressing the cheeks firmly against the side teeth?
Which muscle is engaged when pressing the cheeks firmly against the side teeth?
Which muscle raises and protrudes the upper lip?
Which muscle raises and protrudes the upper lip?
Which muscle pulls the skin of the nose upward, creating transverse wrinkles?
Which muscle pulls the skin of the nose upward, creating transverse wrinkles?
What action does the Depressor anguli Oris muscle perform?
What action does the Depressor anguli Oris muscle perform?
What is the action of the corrugator supercilii muscle?
What is the action of the corrugator supercilii muscle?
Which muscle's action is to widen the apertures of the nostrils?
Which muscle's action is to widen the apertures of the nostrils?
The levator palpebrae superioris muscle is primarily responsible for which action?
The levator palpebrae superioris muscle is primarily responsible for which action?
What is the function of the nasalis muscle's transverse portion?
What is the function of the nasalis muscle's transverse portion?
Which eye muscle is responsible for closing the eyelid firmly?
Which eye muscle is responsible for closing the eyelid firmly?
To look horizontally toward the left, which muscles are involved?
To look horizontally toward the left, which muscles are involved?
Flashcards
Frontalis muscle action
Frontalis muscle action
Raises eyebrows, wrinkles forehead.
Corrugator supercilii action
Corrugator supercilii action
Draws eyebrows together; causes frowning.
Procerus muscle action
Procerus muscle action
Pulls skin of nose upward, creating wrinkles.
Nasalis (alar) action
Nasalis (alar) action
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Orbicularis oculi (orbital) action
Orbicularis oculi (orbital) action
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Orbicularis oculi (palpebral) action
Orbicularis oculi (palpebral) action
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Levator palpebrae superioris action
Levator palpebrae superioris action
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Rectus muscles (eye) action
Rectus muscles (eye) action
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Risorius action
Risorius action
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Zygomaticus Major action
Zygomaticus Major action
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Levator Labii Superioris action
Levator Labii Superioris action
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Depressor Labii Inferioris & Platysma action
Depressor Labii Inferioris & Platysma action
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Mentalis action
Mentalis action
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Orbicularis Oris action
Orbicularis Oris action
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Depressor Anguli Oris action
Depressor Anguli Oris action
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Buccinator action
Buccinator action
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Study Notes
Facial Muscles
- Frontalis: Raises eyebrows, wrinkles forehead. Example: surprise, fright.
- Corrugator supercilii: Draws eyebrows together. Example: frowning.
- Procerus: Pulls skin of nose upward, forming transverse wrinkles. Example: anger.
- Nasalis (alar portion): Widens nostrils. Example: forced breathing.
- Nasalis (transverse portion): Draws point of nose downward, narrows nostrils.
- Orbicularis oculi (orbital part): Closes eyelids firmly.
- Orbicularis oculi (palpebral part): Closes eyelids gently.
- Levator palpebrae superioris: Raises upper eyelid.
- Rectus medialis oculi and rectus lateralis oculi Moves eyes horizontally, either leftward or rightward .
- Risorius: Draws angle of mouth backward.
- Zygomaticus major: Draws angle of mouth upward and outward. Example: smiling.
- Levator labii superioris: Raises and protrudes upper lip. Example: showing upper gum.
- Depressor labii inferioris and platysma: Draws lower lip and angle of mouth downward and outward.
- Mentalis: Raises chin skin, protrudes lower lip. Example: pouting.
- Orbicularis oris: Closes and protrudes lips. Example: whistling.
- Depressor anguli oris: Draws down angle of mouth.
- Buccinator: Presses cheeks against side teeth, pulls back angle of mouth. Example: blowing a trumpet.
- Pterygoideus lateralis: Opens mouth, protrudes lower jaw, moves side to side.
- Pterygoideus medialis, temporalis, and Masseter: Closes jaws, clenches teeth.
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