Quizlet A&P I - Muscles

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  1. adductor brevis: O: pubic bone | I: linea aspera of femur | A: adducts thigh; can flex and medially rotate thigh
  2. adductor longus: O: public bone | I: linea aspera of femur | A: adducts the thigh
  3. adductor magnus: O: pubic bone; ischium | I: gluteal tuberosity of femur; linea aspera of femur | A: adducts thigh
  4. biceps brachii: O: scapula | I: radial tuberosity (radius) | A: flexes shoulder; flexes elbow; supinates hand
  5. biceps femoris: O: long = ischial tuberosity; short = linea aspera of femur | I: lateral side of fibula | A: flexes leg; rotates tibia laterally; long = extends thigh/hip
  6. deltoid: O: clavicle; acromion; scapular spine | I: deltoid tuberosity of humerus | A: flexion; extension; abduction
  7. diaphragm: O: xiphoid process; costal cartilage of lower 6 ribs; L1-L3 vertebrae | I: central tendon (connects two 1/2's of diaphragm) | A: increases volume of thoracic cavity during inspiration
  8. erector spinae: O: iliac crest; sacrum; lumbar spinous processes | I: iliocostalis = ribs; spinalis = spinous processes & skull; longissimus = ribs, transverse processes & mastoid process | A: extend vertebral column; maintain upright posture
  9. extensor digitorum longus: O: tibia; fibula | I: middle and distal phalnges of toes | A: dorsiflexion; extends toes
  10. extensor hallucis longus: O: fibula | I: big toe | A: extends big toe; assists in dorsiflexion
  11. external obliques: O: lower 8 ribs | I: iliac spine and crest; linea alba | A: compresses abdominal contents
  12. flexor carpi radialis: O: medial epicondyle of humerus | I: 2nd and 3rd metacarpels | A: flexes hand at the wrist; aids in wrist abduction
  13. flexor carpi ulnaris: O: medial epicondyle of humerus; olecranon of ulna | I: pisiform bone; 5th metacarpel | A: flexes and adducts hand at the wrist
  14. flexor digitorum longus: O: tibia | I: bases of distal phlanges of toes | A: flexes 4 lateral digits; plantarflexion; aids with inversion; supports foot longitudinal arches; helps toes grip the ground
  15. flexor hallucis longus: O: fibula; interosseous membrane | I: base of distal phalanx of big toe | A: flexes big toe; plantarflexion; helps propel feet during walking and running
  16. gastrocnemius: O: femur | I: calcaneal tendon | A: plantarflexion; flexes leg at knee; raises heel during walking
  17. gluteus maximus: O: iliac crest; sacrum; cocyx | I: femur | A: extends and laterally rotates thigh; abducts and adducts thigh
  18. gluteus medius: O: ilium | I: greater trochanter of femur | A: abducts and medially rotates thigh
  19. gluteus minimus: O: ilium | I: greater trochanter of femur | A: abducts and medially rotates thigh
  20. gracilis: O: pubic bone | I: tibia | A: adducts thigh; flexes leg at knee
  21. iliopsoas: O: lumbar vertebrae; ilium | I: lesser trochanter of femur | A: flexes hip joint
  22. infraspinatus: O: infraspinous fossa of scapula | I: greater tubercle of humerus | A: lateral rotation of humerus
  23. latissimus dorsi: O: thoracic vertebrae | I: humerus | A: extension; adduction; medial rotation
  24. levator scapulae: O: C1-C4 transverse processes | I: superior medial border of scapula | A: elevation of shoulder
  25. masseter: O: zygomatic arch | I: mandible and coronoid process | A: elevates mandible; closes jaw
  26. pectineus: O: pubic bone | I: femur | A: adducts and flexes thigh; assists with medial rotation of thigh
  27. pectoralis major: O: clavicle; sternum | I: humerus | A: adduction; medial rotation; extension; flexion
  28. pectoralis minor: O: ribs 3-5 | I: coracoid process of scapula | A: protraction, depression and downward rotation of shoulder
  29. plantaris: O: femur | I: calcaneus | A: weakly assists plantarflexion
  30. rectus abdominis: O: pubic bone | I: lower costal cartilage of ribs and xyphoid process of sternum | A: flexes vertebral column
  31. rectus femoris: O: anterior inferior iliac spine; ilium | I: quadriceps tendon | A: extends knee; helps iliopsoas flex thigh at hip
  32. rhomboideus: O: C7; T1; T2-T5 | I: medial border of scapula | A: retraction of shoulder
  33. semimembranosus: O: ischial tuberosity | I: medial epicondyle of tibia | A: flexes leg at knee; rotates flexed log laterally; extend thigh at hip joint
  34. semitendinosus: O: ischial tuberosity | I: tibia | A: flexes knee; medially rotates tibia; extends thigh/hip
  35. serratus anterior: O: first 8-9 ribs | I: inside of vertebral border of scapula | A: protraction and upward rotation of shoulder
  36. soleus: O: fibula; tibia | I: calcaneal tendon | A: plantarflexion
  37. sternocleidomastoid muscle: O: sternum and clavicle | I: mastoid process of temporal bone | A: tilts head
  38. subscapularis: O: inner surface of scapula | I: lesser tubercle of humerus | A: medial rotation of humerus
  39. supinator: O: lateral epicondyle of humerus | I: radius | A: supinate forearm
  40. supraspinatus: O: supraspinous fossa of scapula | I: greater tubercle of humerus | A: enforce joint security of glenohumeral joint; abduction
  41. temporalis: O: temporal bone | I: coronoid process of mandible | A: elevates and retracts mandible; closes jaw
  42. tibialis anterior: O: tibia | I: tarsel | A: dorsiflexion; inversion
  43. tibialis posterior: O: interosseous membrane; tibia; fibula | I: metatarsels; tarsels |A: plantarflexion; inversion
  44. trapezius: O: occipital protuberance; C7; all T vertebrae | I: clavicle and scapular spine | A: retraction; elevation; depression; upward rotation of shoulder
  45. triceps brachii: O: long head (scapula); medial & lateral heads (humerus) | I: ulna | A: extends elbow; extends shoulder
  46. vastus intermedius: O: femur | I: quadriceps tendon | A: extends knee
  47. vastus lateralis: O: greater trochanter and linea aspera of femur | I: quadriceps tendon | A: extends knee
  48. vastus medialis: O: femur | I: quadriceps tendon | A: extends knee