Muscles of Facial Expression
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Questions and Answers

Which muscle is primarily responsible for closing the mouth and resisting bulging while blowing?

  • Zygomatic Major
  • Mentalis
  • Depressor of the Lower Lip
  • Buccinator (correct)
  • Which of the following muscles raises the upper lip?

  • Orbicularis Oris
  • Mentalis
  • Zygomatic Minor (correct)
  • Platysma
  • Which muscle contributes to the action of pulling the lower lip up and forward?

  • Elevator of the Angle of the Mouth
  • Depressor of the Angle of the Mouth
  • Mentalis (correct)
  • Risorius
  • Which facial muscle primarily participates in smiling by raising the corners of the mouth?

    <p>Zygomatic Major (A)</p> Signup and view all the answers

    What action is associated with the Platysma muscle?

    <p>Draws the corners of the mouth downward and backward (A)</p> Signup and view all the answers

    What is the principal action of the occipitofrontal muscle?

    <p>Raises the eyebrows and wrinkles the forehead skin (C)</p> Signup and view all the answers

    Which muscle is primarily involved in creating vertical wrinkles above the nose?

    <p>Corrugator supercilii (C)</p> Signup and view all the answers

    Where does the orbicularis oculi muscle originate?

    <p>Medial border of the orbit (A)</p> Signup and view all the answers

    What is the role of the frontal belly in facial expression?

    <p>Retracts the scalp to enhance the frontal belly's effectiveness (D)</p> Signup and view all the answers

    Which of the following actions is NOT performed by the orbicularis oculi?

    <p>Raises the eyebrows (D)</p> Signup and view all the answers

    Flashcards

    Occipitofrontal Muscle

    Muscle that raises eyebrows and wrinkles forehead; pulls scalp forward.

    Orbicularis Oculi

    Muscle that closes eyelids; varies in firmness for blinking.

    Corrugator Supercilii

    Muscle that moves eyebrows medially and downward, indicating worry.

    Frontal Belly

    Muscle that retracts scalp, enhancing the occipitofrontal muscle's action.

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    Occipital Belly

    Muscle located at the back of the head; contributes to scalp movement.

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    Orbicularis Oris

    Facial muscle that closes the mouth and resists bulging when blowing.

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    Zygomatic Major

    Muscle that stretches the mouth outwards and raises the corners of the mouth for a smile.

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    Buccinator

    Muscle that draws the cheek inward, helping to keep the oral cavity stable when blowing.

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    Mentalis

    Muscle that raises and wrinkles the lower lip, creates a pout, pulling the lip up and forward.

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    Depressor of the Lower Lip

    Muscle that depresses the lower lip.

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    Study Notes

    Muscles of Facial Expression

    • Occipitofrontal:

      • Origin: Epicranial aponeurosis
      • Insertion: Skin and subcutaneous tissue of eyebrows and forehead
      • Action: Elevates eyebrows, wrinkles forehead (e.g., surprise, curiosity)
    • Frontal Belly:

      • Origin: Epicranial aponeurosis
      • Insertion: Skin and subcutaneous tissue of eyebrows and forehead
      • Action: Elevates eyebrows, wrinkles forehead (e.g., surprise, curiosity)
    • Occipital Belly:

      • Origin: Occipital bone
      • Insertion: Epicranial aponeurosis
      • Action: Retracts scalp, increases efficiency of frontal belly
    • Orbicularis Oculi:

      • Origin: Medial orbit
      • Insertion: Skin around eyelids
      • Action: Closes eyelids (e.g, blinking), smoothly; eyelid part tightens firmly
    • Corrugator Supercilii:

      • Origin: Medial portion of superciliary arch
      • Insertion: Skin between eyebrows
      • Action: Draws eyebrows medially and downward; creates vertical wrinkles above nose (e.g., concern, worry)

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    Description

    Explore the intricate details of the muscles responsible for facial expressions. This quiz covers the origins, insertions, and actions of key facial muscles like the Occipitofrontal, Orbicularis Oculi, and Corrugator Supercilii. Test your knowledge and understanding of how these muscles contribute to our ability to express emotions.

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