A&P Lab muscle origins

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Author:
lhills
ID:
180267
Filename:
A&P Lab muscle origins
Updated:
2012-11-06 22:17:03
Tags:
Muscle origin insertion action
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Description:
Muscle origin, insertion, & action
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  1. Frontalis
    • Origin: Galea aponeurotica
    • Insertion: Skin superior to orbit
    • Action: raises eyebrow, draws scalp anteriorly
  2. Orbicularis oculi
    • Origin: frontal bone, maxilla
    • Insertion: skin of eyelid
    • Action: closes eye
  3. Temporalis
    • Origin: Temporal fossa
    • Insertion: Coronoid process & mandibular ramus
    • Action: Elevates & retracts mandible
  4. Masseter
    • Origin: Zygomatic arch
    • Insertion: lateral ramus of mandible
    • Action: elevates and protracts mandible
  5. zygomaticus major & minor
    • Origin: zygomatic bone
    • Insertion: muscle & skin at angle of mouth
    • Action: elevates and abducts upper lip
  6. Orbicularis oris
    • Origin: Fascia of facial muscles, maxilla and mandible
    • Insertion: skin of lips
    • Action: close lips
  7. Digastic
    • Origin: Mastoid process of temporal (posterior belly)
    • Insertion: madible near midline (anterior belly)
    • Action: elevates, protracts, and tracts hyoid; depresses mandible
  8. Sternocleidomastoid
    • Origin: manubrium and medial clavicle
    • Insertion: Mastiod process, superior nucal line
    • Action:
    • -One: rotates and extends neck
    • -Both: flex neck
  9. Platysma
    • Origin: Fascia covering pectoralis major and deltoid
    • Insertion: skin over inferior border of mandible
    • Action: depresses lower lip
  10. Trapezius
    • Origin: Occipital protuberance, nuchal ligament, spinous processes of C7-T12
    • Insertion: Clavicle, acromion procession, and scapular spine
    • Action: Extends & laterally flexes neck
  11. Pectoralis major
    • Origin: clavicle, sternum, cartilage of ribs 1-7
    • Insertion: crest of greater tubercle of humerus
    • Action: flexes, adducts, and medially rotates arm
  12. Pectoralis minor
    • Origin: ribs 3-5
    • Insertion: coracoid process of scapula
    • Action: depresses glenoid cavity, raises ribs 3-5
  13. Serratus anterior
    • Origin: Ribs 1-9
    • Insertion: medial border of scapula
    • Action: abducts scapula
  14. Rectus abdominis
    • Origin: pubic crest, symphysis pubis
    • Insertion: inferior ribs, xiphoid process
    • Action: flexes vertebral column, compresses abdominal wall
  15. External abdominal oblique
    • Origin: Ribs 5-12
    • Insertion: inguinal ligament iliac crest, rectus sheath
    • Action: compresses abdominal wall, laterally rotates trunk
  16. Internal abdominal oblique
    • Origin: inguinal ligament, iliac crest, lumbar fascia
    • Insertion: linea alba, ribs 10-12, rectus sheath
    • Action: compresses abdominal wall, laterally rotates trunk
  17. Transverse abdominis
    • Origin: inguinal ligament, iliac crest, ribs 7-12
    • Insertion: xiphoid process, linea alba, crest of pubis
    • Action: compresses abdominal wall, laterally rotates trunk
  18. Latissimus dorsi
    • Origin: spinous processes of T7-L5; sacrum and iliac creat; inferior angle of scapula in some people
    • Insertion: medial crest of intertubercular groove
    • Action: adducts and medially rotates arm; extends shoulder
  19. Linea alba???
    • Origin:
    • Insertion:
    • Action:
  20. Tendinous intersection of muscles???
    • Origin:
    • Insertion:
    • Action:
  21. Biceps bracii
    • Origin: supraglenoid tubercle, coracoid process of scapula
    • Insertion: radial tuberosity
    • Action: flexes arm, flexes forearm, supinates hand
  22. Deltoid
    • Origin: clavicle, acromion process, spine of scapula
    • Insertion: deltoid tuberosity of humerus
    • Action: abducts, flexes, extends arm, medially and laterally rotates arm
  23. Triceps brachii
    • Origin: infraglenoid tuberosity of scapula, lateral and posterior surface of humerus
    • Insertion: olecranon process of ulna
    • Action: extends and adducts arm extends forearms
  24. Brachialis
    • Origin: anterior, distal surface of humerus
    • Insertion: coronoid process of ulna
    • Action: flexes forearm
  25. Brachioradialis
    • Origin: later suprocondylar ridge of humerus
    • Insertion: styloid process of radius
    • Action: flexes forearm
  26. Flexor carpi radialis
    • Origin: medial epicondyle of humerus
    • Insertion: metacarpals 2 & 3
    • Action: flexes and abducts hand
  27. Flexor carpi ulnaris
    • Origin: medial epicondyle of humerus & ulna
    • Insertion: Pisiform, hamate, metacarpal 5
    • Action: flexes and adducts hand
  28. Extensor digitorum
    • Origin: lateral epicondyle of humerus
    • Insertion: middle & distal phalanges of digits 2-5
    • Action: extends phalanges 2-5, extends hand
  29. Extensor carpi ulnaris
    • Origin: lateral edpicondyle of humerus, proximal ulna
    • Insertion: metacarpal 5
    • Action: extends and adducts hand
  30. Tensor fascia latae
    • Origin: anterior superior iliac spine
    • Insertion: lateral condyle of tibia
    • Action: flexes, abducts and medially rotates thigh
  31. Sartorius
    • Origin: anterior superior iliac spine
    • Insertion: proximal, medial tibia
    • Action: flexes and laterally rotates thigh, flexes leg
  32. Gracilis
    • Origin: Pubis (near symphysis)
    • Insertion: proximal, medial tibia
    • Action: adducts thigh, flexes leg
  33. Rectus femoris
    • Origin: anterior inferior iliac spine
    • Insertion: tibial tuberosity by the patellar ligaments
    • Action: flexes thigh, extends leg
  34. Vastus lateralis
    • Origin: greater trochanter & linea asper of femur
    • Insertion: Tibial tuberosity by the patellar ligaments
    • Action: extends leg
  35. Vastus intermedius
    • origin: proximal, anterior femur
    • Insertion: tibial tuberosity by the patellar ligament
    • Action: extends leg
  36. Vastus medialis
    • Origin: linea aspera of femur on medial side
    • Insertion: tibial tuberosity by the patellar ligament
    • Action: extends leg
  37. Tibialis anterior
    • Origin: tibia (interosseous membrane)
    • Insertion: metetarsal 1 & cuneiform 1
    • Action: dorsiflexes & inverts foot
  38. Extensor digitorum longus
    • Origin: lateral condyle of tibia, shaft of fibula
    • Insertion: middle & distal phalanges of digits 2-5
    • Action: extends toes 2-5, dorsiflexes and everts foot
  39. Extensor hallicus longus
    • Origin: anterior shaft of fibula (interosseous membrane)
    • Insertion: distal phalanx of hallux (big toe)
    • Action: extends hallux, dorsiflexes foot, inverts foot
  40. Supraspinatus
    • Origin: scapula
    • Insertion: humerus
    • Action: Abduction of arm & Holds head of humerus in glenoid cavity
  41. Infraspinatus
    • Origin: Scapula
    • Insertion: Humerus
    • Action: Lateral rotation of arm & Holds head of humerus in glenoid cavity
  42. Teres minor
    • Origin: Scapula
    • Insertion: Humerus
    • Action: Lateral rotation of arm, Holds head of humerus in glenoid cavity, Adduction of arm
  43. Subscapularis
    • Origin: Scapula
    • Insertion: Humerus
    • Action: Medial rotation of arm & Holds head of humerus in glenoid cavity
  44. Rhomboid major
    • Origin: Spinous processes T2-5
    • Insertion: Scapula
    • Action: adduction of scapula & Elevation of scapula
  45. Rhomboid minor
    • Origin: Spinous process of C7-T1
    • Insertion: Scapula
    • Action: adduction of scapula & Elevation of scapula
  46. Latissimus Dorsi
    • Origin: Sacral and lumbar spines, Ilium (iliac crest), Ribs (lower 4), Spinous processes of T6-12 vertebrae, Scapula
    • Insertion: Humerus
    • Action: Adduction of arm, Extension of arm & Medial rotation of arm
  47. Trapezius
    • Origin:
    • ¬†Occipital bone, Nuchal ligament,Vertebra prominens (spinous process of C7 vertebra), Spinous processes of T1-12 vertebrae
    • Insertion: Clavicle & Scapula
    • Action:
    • Upper fibers: elevation of scapula; superior rotation of scapula (glenoid cavity directed superiorly)
    • Middle fibers: retraction (adduction) of scapula
    • Lower fibers: depression of scapula

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