muscles of the neck

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Author:
Anonymous
ID:
105820
Filename:
muscles of the neck
Updated:
2011-10-02 17:40:28
Tags:
origin insertion innervation action blood supply
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Description:
muscle of the neck: origin, insertion, innervation, action, and blood supply
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  1. Platysma muscle Origin
    inferior border of mandible, superficial fascia of the lower face, and skin
  2. Platysma muscle Insertion
    fascia overlying the superior parts of the pectoralis major muscle and deltoid muscle
  3. platysma muscle innervation
    cervical branch of the facial nerve
  4. Platysma muscle Action:
    inferiorly draws four corners of mouth; and widens it; superiorly raise the skin of the neck when teeth are clenched, thus showing tension
  5. Platysma muscle Blood Supply
    • facial artery/ v.
    • transverse cervical a./v.
    • anterior jugular v.
    • cutaneous cervical a./ v.
  6. Sternohyoid muscle Origin
    • manubrium of the sternum
    • medial end of clavicle
  7. sternohyoid muscle insertion
    body of hyoid bone
  8. sternohyoid muscle innervation
    C1 - C3 by branches of ansa cervicalis
  9. sternohyoid muscle action:
    depress the hyoid bone; after elevation from swallowing
  10. sternohyoid muscle blood supply
    superior and inferior thyroid artery and vein
  11. Stylohyoid muscle origin
    styloid process of the temporal bone
  12. stylohyoid muscle insertion
    body of the hyoid bone
  13. stylohyoid muscle innervation
    stylohyoid branch of the facial nerve
  14. stylohyoid muscle action:
    elevate and retract the hyoid; elongating the floor of the mouth
  15. stylohyoid muscle blood supply:
    • facial a./v.
    • lingual a./ v.
  16. thyrohyoid muscle origin
    olique line of the thyroid cartilage
  17. thyrohyoid muscle insertion
    • inferior border of the hyoid bone
    • greater horn of hyoid bone
  18. thyrohyoid muscle innervation
    C1 by hypoglossal nerve
  19. thyrohyoid muscle action:
    depress the hyoid and elevates the larynx
  20. thyrohyoid muscle blood supply:
    • superior thyroid a./ v.
    • inferior thyroid a./ v.
  21. sternocleidomastoid muscle origin
    • lateral surface of the mastoid process of temporal bone
    • lateral half of superior nachel line
  22. sternocleidomastoid muscle insertion
    • sternal head: anterior surface of the manubrium
    • clavicular head: superior surface ofmiddle 3rd of clavicle
  23. sternocleidomastoid muscle innervation
    spinal accessory nerve and C2 & C3
  24. sternocleidomastoid muscle action:
    unilateral: turning head to same side and rotates it so face is turned superiorly towards opposite side

    bilateral: allows chin to head towards manubrium; chin is thrust forward with head kept level
  25. sternocleidomastoid muscle blood supply:
    superior thyroid a./ v.
  26. Omohyoid muscle Origin
    superior border of the scapula near the suprascapular notch
  27. omohyoid muscle insertion
    inferior border of the hyoid bone
  28. omohyoid muscle innervation
    C1 - C3 by branches of ansa cervicalis
  29. Omohyoid muscle action
    depress, retract and steady the hyoid bone
  30. omohyoid muscle blood supply:
    superior and inferior thyroid a./ v.
  31. sternothyroid muscle origin:
    posterior portion of the manubrium
  32. sternothyroid muscle insertion:
    oblique line of the thyroid cartilage
  33. sternothyroid muscle innervation:
    C2 and C3 by branches of ansa cervicalis
  34. sternothyroid muscle action:
    depress the hyoid and larynx
  35. sternothyroid muscle blood supply:
    superior and inferior thyroid a./ v.

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