Muscles of mastication, eye, neck, abdominal wall

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Author:
Daisyh367
ID:
309636
Filename:
Muscles of mastication, eye, neck, abdominal wall
Updated:
2015-10-14 20:37:18
Tags:
muscles
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Description:
action, insertion, origin
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  1. masseter
    • a-elevates mandible
    • i-lateral surface & angle of mandibular ramus
    • o-zygomatic arch
  2. superior rectus
    a-eye looks up
  3. inferior rectus
    a-eye looks down
  4. medial rectus
    a-eye looks medially
  5. lateral rectus
    a-eye looks laterally
  6. superior oblique
    a-eye looks down and laterally
  7. inferior oblique
    a-eye looks up & laterally
  8. levator palpebrae superioris
    a-elevates upper eyelid
  9. platysma
    a-depresses mandible & tenses skin of neck
  10. sternocleidomastoid
    • a-turns head to side, flexes neck
    • i-mastoid region of temporal bone & superior nuchal line
    • o-sternum & clavicle
  11. trapezius
    • a-elevates scapula, hyperextends neck, braces shoulder
    • o-occipital bone, thoracic vertebrae
    • i-clavicle, spine, & acromion process of scapula
  12. levator scapulae
    a-elevates scapula
  13. sterno hyoid
    • a-depresses hyoid and larynx
    • o-clavicle & manubrium
    • i-hyoid bone
  14. rectus abdominis
    • a-flexes vertebral column, compresses abdomen
    • o-superior surface of pubis & pubic symphysis
    • i-costal cartilage of ribs 5-7 & xiphoid process
  15. external oblique
    • a-compresses abdomen & rotates/laterally flexes vertebral column
    • o-lower 8 pairs of rib
    • i-anterior iliac crest & recruits sheath to linea alba
  16. internal oblique
    a-compresses abdomen & flexes vertebral column
  17. transversus abdominis
    a-compresses abdomen

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