Muscles of Facial Expression Overview
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Questions and Answers

Which muscle(s) is/are involved in the action of depressing the lower lip?

  • Depressor Labii Inferioris (correct)
  • Orbicularis Oris
  • Levator Labii Superioris
  • Zygomaticus Minor
  • Which muscle(s) is/are responsible for elevating the corners of the mouth?

  • Zygomaticus Minor
  • Zygomaticus Major (correct)
  • Levator Labii Superioris
  • Orbicularis Oris
  • Which nerve supplies the Zygomaticus Minor muscle?

  • Facial nerve, mandibular branch
  • Facial nerve, zygomatic and buccal branches
  • Facial nerve, buccal & zygomatic branches (correct)
  • Facial nerve, buccal branch
  • Which muscle(s) receives blood supply from both the Facial and Maxillary arteries?

    <p>Depressor Labii Inferioris and Orbicularis Oris (D)</p> Signup and view all the answers

    Which muscle is involved in the action of compressing the lips?

    <p>Orbicularis Oris (D)</p> Signup and view all the answers

    What is the name of the muscle that allows us to close our eyes forcefully?

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

    Which of the following muscles is NOT involved in facial expression?

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

    What is the origin of the Dilator Naris muscle?

    <p>The nasal margin of the maxilla (B)</p> Signup and view all the answers

    Which artery supplies blood to the Palpebrae muscle?

    <p>All of the above (D)</p> Signup and view all the answers

    Which of the following muscles is responsible for flaring the nostrils?

    <p>Dilator Naris (A)</p> Signup and view all the answers

    Which of the muscles, mentioned in the text, is responsible for depressing the corner of the mouth?

    <p>Depressor Anguli Oris (B)</p> Signup and view all the answers

    What is the main action of the Mentalis muscle?

    <p>Puckers and pulls the skin of the chin up (C)</p> Signup and view all the answers

    What is the role of the Buccinator muscle during mastication?

    <p>Compresses the cheek against the molars to direct food (C)</p> Signup and view all the answers

    Which of the following muscles is NOT directly involved in facial expression?

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

    Which of the following muscles is responsible for pulling the scalp up and back, elevating the eyebrows, and wrinkling the scalp?

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

    Which muscle is responsible for retracting the angle of the mouth, assisting in smiling?

    <p>Risorius (B)</p> Signup and view all the answers

    Which of the following muscles is primarily responsible for closing the eyes?

    <p>Orbicularis Oculi (A)</p> Signup and view all the answers

    Which of the following branches of the facial nerve is responsible for providing nerve supply to the Buccinator muscle?

    <p>Buccal branch (C)</p> Signup and view all the answers

    Which of the following is NOT a function of the facial muscles?

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

    Which of the following statements about the facial muscles is TRUE?

    <p>They all insert into the skin. (B)</p> Signup and view all the answers

    Which of the following is NOT a branch of the facial nerve?

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

    What is the primary function of the facial muscles?

    <p>To control movement of the facial skin (D)</p> Signup and view all the answers

    Why is it important to understand the facial muscles and their actions?

    <p>All of the above (D)</p> Signup and view all the answers

    What is the origin of the Anterior Auricular muscle?

    <p>Scalp and temporal fascia (D)</p> Signup and view all the answers

    Which muscle is responsible for pulling the ear slightly forward?

    <p>Anterior Auricular (C)</p> Signup and view all the answers

    Which blood supply is common to the Anterior Auricular and Superior Auricular muscles?

    <p>Posterior auricular artery (B)</p> Signup and view all the answers

    What action is performed by the Posterior Auricular muscle?

    <p>Pulls the ear back (B)</p> Signup and view all the answers

    Which nerve supplies the Superior Auricular muscle?

    <p>Facial nerve, temporal branch (A)</p> Signup and view all the answers

    Where does the Compressor Naris muscle insert?

    <p>Midline over the nasal cartilage (A)</p> Signup and view all the answers

    Which condition can potentially affect the functionality of the facial muscles?

    <p>Bell's Palsy (B)</p> Signup and view all the answers

    What is the action of the Superior Auricular muscle?

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

    Flashcards

    Orbicularis Oris

    Muscle that circles the mouth and controls lip movement.

    Levator Labii Superioris

    Muscle that elevates the upper lip.

    Depressor Labii Inferioris

    Muscle that depresses the lower lip.

    Zygomaticus Minor

    Muscle that elevates the upper lip; runs from zygomatic arch to orbicularis oris.

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    Zygomaticus Major

    Muscle that elevates the corners of the mouth, associated with smiling.

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    Muscles of facial expression

    Muscles that control facial movement and convey emotions.

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    Innervation of facial muscles

    Facial muscles are innervated by the facial nerve (CN VII).

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    Functions of facial muscles

    Facial muscles aid in emotions, speech, and mastication.

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    Branches of the facial nerve

    Five branches supply the facial muscles: temporal, zygomatic, buccal, mandibular, cervical.

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    Supplies of facial muscles

    Facial muscles are supplied by the facial artery.

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    Orbital Muscle

    Muscle surrounding the eye, closes it forcefully.

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    Palpebrae

    Muscle that gently closes the eyes (blinking).

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    Corrugator

    Muscle that pulls eyebrows medially to frown.

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    Procerus

    Muscle that pulls eyebrows down and wrinkles the nose.

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    Dilator Naris

    Muscle that flares the nostrils.

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    Levator Anguli Oris

    Muscle that elevates the corner of the mouth; originates from canine fossa of the maxilla.

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    Depressor Anguli Oris

    Muscle that depresses the corners of the mouth; located beneath the angle of the mandible.

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    Mentalis

    Muscle on the chin that puckers the skin and aids in food clearance; originates from the mandible.

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    Buccinator

    Muscle that pulls back corners of the mouth and compresses cheeks during chewing; blends with Orbicularis Oris.

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    Risorius

    Muscle that retracts the angle of the mouth, aiding in smiling; originates from the mandible.

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    Occipitofrontalis

    Muscle made of Frontalis and Occipitalis; elevates eyebrows and wrinkles scalp; associated with facial expression.

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    Platysma

    Neck muscle that pulls down corners of the mouth and wrinkles skin of chin and neck; originates from clavicle and shoulder.

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    Orbicularis oculi

    Muscle around the eyes that facilitates closing and blinking; has two parts.

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    Compressor Naris

    Muscle that closes the nostrils; originates from the maxillary canine ridge and inserts over nasal cartilage.

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    Anterior Auricular

    Muscle that pulls the ear slightly forward; originates from the scalp and temporal fascia and inserts at the ear's helix.

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    Superior Auricular

    Muscle that raises the ear; originates from the scalp and temporal fascia and attaches to the superior aspect of the ear.

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    Posterior Auricular

    Muscle that pulls the ear back; originates from the mastoid process and inserts on the inferior medial aspect of the auricle.

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    Facial Nerve Supply

    The facial nerve (CN VII) supplies the muscles of facial expression, including the ear muscles.

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    Blood Supply of Ear Muscles

    The posterior auricular artery supplies blood to the anterior, superior, and posterior auricular muscles.

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    Effects of Bell's Palsy

    Condition that can impair facial muscle functionality, leading to facial drooping and difficulty in expressions.

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    Muscle Actions in Facial Expression

    Facial muscles are responsible for emotional expression and movements like smiling and frowning.

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    Study Notes

    Muscles of Facial Expression

    • Facial muscles originate from bone or fascia and insert into the skin.
    • These muscles are innervated by the facial nerve and supplied by the facial artery.
    • Facial muscles move facial skin in various ways to reflect emotions, hence the name "muscles of facial expression."

    GDC ILOS

    • Describe relevant dental, oral, craniofacial, and general anatomy, and explain its application to patient management.
    • Describe relevant and appropriate physiology, and explain its application to patient management.

    Aim

    • To gain an overview of muscles involved in facial expressions and their functions.

    Learning Outcomes

    • List muscles of facial expression.
    • Outline the origin, insertion, action, innervation, and blood supply for each muscle.
    • Anatomical terminology
    • Muscles
    • Skull
    • Regional anatomy

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    Description

    Explore the vital muscles of facial expression, their origins, insertions, actions, innervations, and blood supply. This quiz aims to enhance your understanding of these muscles' roles in conveying emotions and their importance in dental and craniofacial anatomy.

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