Muscles of the head and neck (cervical & facial)

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  1. The origin is
    the end of the muscle that is attached to the least movable structure
  2. The insertion is
    the other end of the muscle and is attached to the more movable structure
  3. What does The sternocleidomastoid muscle do
    balances positions and turns the head
  4. To feel the sternocleidomastoid muscle you would ask the patient to
    turn to the left
  5. The muscles of the head and neck are divided according to function into what six main groups
    • ˜cervical muscles˜
    • muscles of facial expression˜
    • muscles of mastication˜
    • hyoid muscles˜
    • muscles of the tongue
    • ˜muscles of the pharynx
  6. Name the two cervical muscles
    sternocleidomastoid and trapezius
  7. One of the largest and most superficial cervical muscles is the paired
    sternocleidomastoid muscle (SCM)
  8. The SCM originates from the ______ to insert at the
    • clavicle and the sternum and passes posteriorly and superiorly
    • on the mastoid process of the temporal bone
  9. The SCM is innervated
    by the eleventh cranial or accessory nerve
  10. Which muscle is superficial to both the lateral and posterior surfaces of the neck
    trapezius muscle
  11. The trapezius muscle originates from ______ and inserts at _______
    • the occipital bone and the posterior midline of the cervical and thoracic regions
    • on the clavicle and the scapula
  12. All the muscles of facial expression originate from ______ and inserts on _______
    • from the surface of the skull bone
    • dermis of skin tissue
  13. All the muscles of facial expression are innervated by
    the seventh cranial or facial nerve
  14. The _________ is a muscle of facial expression in the scalp region
    epicranial muscle or epicranius
  15. Epicranial muscle has two bellies called
    frontal and occipital
  16. The bellies of the epicranial are separated by
    a large, spread-out scalpal tendon, the epicranial aponeurosis
  17. The frontal belly inserts into the skin
    of the eyebrow and root of the nose
  18. What do both bellies of the epicranial muscle do
    raise the eyebrows and scalp, as when a person shows surprise
  19. The ______ muscle is a muscle of facial expression that encircles the eye
    orbicularis oculi
  20. What action does the orbicularis oculi muscle do
    This muscle closes the eyelid
  21. Where is the corrugator supercilii muscle located
    deep to the superior part of the orbicularis oculi muscle
  22. What actions does the corrugator supercilii muscle do
    This muscle draws the skin of the eyebrow medially and inferiorly toward the nose, which causes vertical wrinkles in the glabella area of the forehead and horizontal wrinkles at the bridge of the nose, as when a person frowns
  23. What are the three muscles associated with the nasal region
    nasalis, the procerus, and the depressor septi nasi
  24. The largest and best developed of the nasal muscles is the
    nasalis
  25. What action does the nasalis do
    flare the nares
  26. What mucle acts to shape and control the size of the mouth opening
    orbicularis oris muscle
  27. What action does the orbicularis oris muscle perform
    pressing together (closing lips), tightening and thinning (pursing lips), rolling inward between the teeth (grimacing), and thrusting outward (pouting and kissing
  28. The buccinator muscle is a thin quadrilateral muscle of facial expression that forms
    the anterior part of the cheek or the lateral wall of the oral cavity
  29. What are the actions of the buccinator muscle
    • assists the muscles of mastication
    • keep food pushed back on the occlusal surface of the posterior teeth, as when a person chews
    • pulls each labial commisssure laterally and shortens the cheek both vertically and horizontally
  30. What action does the risorius muscle perform
    • ˜stretch the lips laterally, retracting the labial commissure and widening the oral cavity.
    • produces more of a grimace
  31. What action does the levator labii superioris muscle perform
    It elevates the upper lip
  32. What action does the levator labii superioris alaeque nasi muscle  perform
    elevates the upper lip and ala of the nose, thus also dilating each naris, as in a sneering expression
  33. What action does the zygomaticus major muscle perform
    elevates the labial commissure of the upper lip and pulls it laterally, as when a person smiles
  34. What action does the zygomaticus minor muscle perform
    It elevates the upper lip, assisting in smiling
  35. What action does the levator anguli oris muscle perform
    It elevates the labial commissure, as when a person smiles
  36. What action does the depressor anguli oris muscle perform
    It depresses the angle of the mouth, as when a person frowns
  37. What action does the depressor labii inferioris perform
    • It depresses the lower lip, exposing the mandibular incisor teeth
    • Some experts have suggested that it expresses irony
  38. What action does the mentalis muscle perform
    It raises the chin, wrinkling the skin, causing the displaced lower lip to protrude, and narrowing the oral vestibule
  39. What action does the platysma muscle perform
    • This muscle raises the skin of the neck to form noticeable vertical and horizontal ridges and depressions
    • It can also pull the labial commissures down, as when a person grimaces
  40. The action of the muscle is
    The movement that is accomplished when the muscle fibers contract
  41. What does contralateral mean
    structure on opposite side
  42. What is the action of the trapezius muscle
    The trapezius muscle acts to lift the clavicle and scapula, as when the shoulders are shrugged

Card Set Information

Author:
haitianwifey
ID:
323356
Filename:
Muscles of the head and neck (cervical & facial)
Updated:
2016-09-22 15:26:40
Tags:
Muscles head neck
Folders:
Dental anatomy
Description:
Muscles of the head and neck
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