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Bell Work

Bell Work. What type of lever are most skeletal muscles in the body?. Muscles of Facial Expression. Epicranius : covers the upper cranium; consists of 2 parts: Frontalis - covers frontal bone Occipitalis - covers occipital bone

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Bell Work

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  1. Bell Work What type of lever are most skeletal muscles in the body?

  2. Muscles of Facial Expression • Epicranius: covers the upper cranium; consists of 2 parts: • Frontalis- covers frontal bone • Occipitalis- covers occipital bone United by epicranialaponeurosis(tendinous muscle) that contracts to raise the eyebrows thus wrinkling the forehead

  3. Muscles of the Head & Neck Figure 7-12(c)

  4. Facial Muscles

  5. Muscles of Facial Expression • OrbicularisOculi- muscle encircling the eye; closes the eye & compresses the lacrimal gland • OrbicularisOris- encircles the mouth; helps close and pucker the lips

  6. Facial Muscles

  7. Muscles of Facial Expression • Buccinator- in the cheek wall, compresses the cheek inward which helps hold food in contact w/ teeth when chewing

  8. Facial Muscles

  9. Muscles of Facial Expression • Zygomaticus Major & Minor- extend from the zygomatic arch to the mouth corner; when they contract the mouth corner moves upward.

  10. Facial Muscles

  11. Muscles of Facial Expression • Platysma- thin, sheet-like muscle extending from the chest to the neck and face; pulls the mouth down & helps lower the mandible

  12. Facial Muscles

  13. Muscles of Facial Expression • Platysma- thin, sheet-like muscle extending from the chest to the neck and face; pulls the mouth down & helps lower the mandible

  14. Muscles of Facial Expression • Nasalis- depresses the tip of the nose & elevates the nostril corners • LevatorLabiiSuperioris- lifts the upper lip and flairs the nostrils Nasalis LevatorLabiiSuuperioris

  15. Facial Muscles

  16. Muscles of Facial Expression • Mentalis- elevates and protrudes the lower lip • Depressor AnguliOris- depresses the angle of the mouth Mentalis

  17. Facial Muscles

  18. Muscle Mania… • Your group will be given three white boards • 1 member will be responsible for each board • Based on the information given to you, your group must identify the following information: • Muscle Name • Origin • Insertion • Action

  19. Muscles of Mastication • Masseter- raises the jaw and clenches the teeth; functions to chew food. extends from the zygomatic arch to the mandible.

  20. Mastication Muscles

  21. Muscles of Mastication • Temporalis- fan shaped muscle on the side of the skull above & in front of the ear; helps raise the jaw & passes downward beneath the zygomatic arch to the mandible

  22. Mastication Muscles

  23. Muscles of Mastication • Medial Pterygoid- Extends down from the sphenoid, palatine & maxillary bones to the ramus; raises the jaw & it moves from side to side

  24. Mastication Muscles

  25. Muscles of Mastication • Lateral Pterygoid- Extends down from the mandibularcondyle to the sphenoid bone; lowers the mouth & move the mandible from the side to side

  26. Mastication Muscles

  27. Muscles of Mastication • Sternocleidomastoid- long muscle on the neck; extends from the thorax to the skull base behind the ear • when it contracts on one side; the face turns the opposite way • when both contract, the head is brought to the chest

  28. Muscles of the Head & Neck Figure 7-12(a)

  29. Muscles of Anterior Neck Figure 7-13

  30. Do Now! What muscle is known as the smiling muscle? What muscle is known as the frowning muscle?

  31. Your Task • You must take at least 15 facial pictures (using your phone) • Once you and your partner have your pictures, you must attach them to a power-point • In the power-point, you must explain what facial muscles are contributing to the facial expression that is captured

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