Muscles

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Author:
claire_0068
ID:
81282
Filename:
Muscles
Updated:
2011-04-23 14:39:09
Tags:
muscles
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Description:
muscles
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  1. frontal belly of the epiccranius (frontalis)

    OIA?
    • 1. orgin:galea aponeurotica
    • 2. Instertion:skin of eyebrow root of nose
    • 3. Action: raises eyebrows wrinkles forehead horizontaly
  2. zygomaticus

    OIA?
    • orgin: zygomatic bone
    • insertion:skin and muscle at corner of mouth
    • action: raises lateral corner of mouth. smiling muscle
  3. temporalis
    OIA?
    • origin:temporal fossa
    • insertion:coronoid process of the mandible
    • action:elevates and retracts the mandible,maintains position of the mandible
  4. masseter
    OIA?
    • origin: zygomatic arch and maxilla
    • insertion: angle and ramus of the mandible
    • action:prime mover of the jaw,elevates the mandible
  5. sternocleidomastoid

    OIA?
    • origin:manubrium of sternum and medical portion of clavicle
    • insertion:mastoid process of temporal bone and superior nuchal line of occipatal bone
    • action: prime mover of head flexion,simultaneous contraction of both causes neck flexion, laterally flexes head to one side
  6. depressor labii inferious
    OIA?
    • origin:body of mandible lateral to its midline
    • insertion: skin and muscle of the lower lip
    • action:draws lower lip infeiorly(pout)
  7. orbicularis

    A?
    closes lips,protudes lips, kissing whistling
  8. stylohyoid
    OIA?
    • origin:styloid process of temporal bone
    • insertion:hyoid bone
    • action: elevates the and retracts the hyoid bone. thereby elongating the floor of the mouth during swallowing
  9. sternohyoid
    OIA?
    • origin:manubrium and medial end of clavicle
    • insertion: lower margin of hyoid bone
    • action:depresses larynx and hyoid bone if mandible is fixed may also flex skull
  10. sternothyroid
    OIA?
    • origin: posterior surface of manubrium of sternum
    • insertion:thyroid cartilage
    • action:pulls thyroid cartlilage
  11. pectoralis major
    A?
    prime mover or arm flexion,roates it medially,adducts arm against resistance,fixed with scapula can pull rip cage upward can help(climbing throwing pusing and forced inspiration
  12. deltoid

    A?
    prime mover of arm abduction when contracted,antagonast of pectoralis majorwhich adducts arm
  13. latissimus dorsi

    A?
    • prime mover of arm extension
    • powerful arm adductor
    • medially rotates arm at shoulder
    • depresses scapula important role in bringing arm downin a powerful stroke(hammering swimming)
  14. trapezius
    A?
    stabilizes raises retracts and rotates scapula
  15. triceps brachii
    A?
    powerful forearm extensor (prime mover)
  16. biceps brachii
    A?
    • flexes elbow joint and supinates forearm
    • weak flexor of arm at shoulder
  17. brachialis
    A?
    • major forearm flexor
    • lifts ulna as biceps lifts the radius
  18. gracilis
    A?
    • adducts thigh
    • flexes and medially rotates thigh especially during walking
    • flexes the knee
  19. rectus femoris
    A?
    extends knee and flexes thigh at hip
  20. gluteus maximus
    A?
    • major extensior of thigh
    • laterially rotates and abducts thigh
  21. biceps femoris
    A
    • extends thigh and flexes knee
    • laterially rotates leg
    • especilly when knee is flexed
  22. tibialis anterior
    A?
    • prime mover of dorsiflexion
    • inverts foot
    • assists in supporting medial longitudinal arch of foot
  23. gastrocnemius
    A?
    • plantar flexes foot when knee is extended
    • can flex knee when foot is dorsiflexed

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