Unit 1 Actions.txt

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Anonymous
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99538
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Unit 1 Actions.txt
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2011-09-02 21:13:03
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Anatomy Unit Muscle Actions
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Unit 1 Muscle actions
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  1. What is the action of the Splenius Capitis?
    • Alone - laterally bends and rotates the head
    • With Splenius cervicis - Extend head and neck
  2. What is the action of the Splenius Cervicis?
    • Alone - laterally bends and rotates the head
    • With Splenius cervicis - Extend head and neck
  3. What is the action of the Semispinalis capitis?
    Extends neck and rotates head to opposite side
  4. What is the action of the Iliocostalis?
    • Alone - Lateral flexion
    • As part of erector spinae group - Extends the vertebral column
  5. What is the action of the Longissmus?
    • Alone - Lateral flexion
    • As part of erector spinae group - Extends the vertebral column
  6. What is the action of the Spinalis?
    • Alone - Lateral flexion
    • As part of erector spinae group - Extends the vertebral column
  7. What is the action of the Serratus Posterior Superior?
    Elevates ribs during inspiration
  8. What is the action of the Serratus Posterior Inferior?
    Pulls ribs down and out during inspiration
  9. What is the action of the Trapezius?
    • Upper: Elevates and upward rotation of scapula
    • Middle: Retraction of scapula
    • Lower: Depress and upwardly rotate scapula
    • See page 702
  10. What is the action of the Latissmus Dorsi?
    Extends, adducts and medially rotates the humerus
  11. What is the action of the Rhomboid Major?
    Adducts, retracts, and downwardly rotates scapula
  12. What is the action of the Rhomboid Minor?
    Adducts, retracts, and downwardly rotates scapula
  13. What is the action of the Levator Scapulae?
    Elevates and downwardly rotates scapula
  14. What is the action of the Pectorlais Major?
    Adducts and medially rotates humerus
  15. What is the action of the Pectorlais Minor?
    Protracts and depresses scapula
  16. What is the action of the Subclavius?
    Stabilizes and depresses clavicle
  17. What is the action of the Serratus Anterior?
    • Protracts and upwardly rotates scapula
    • Stabilizes scapula on thoracic wall
  18. What is the action of the Coracobrachialis?
    Flexion and adduction of the arm
  19. What is the action of the Deltoid?
    • Anterior fibers: Flex humerus
    • Middle fibers: Abduct humerus
    • Posterior fibers: Extend humerus
  20. What is the action of the Teres Major?
    Medially rotates and adducts humerus
  21. What is the action of the Teres Minor?
    Stabilizes shoulder joint and laterally rotates humerus
  22. What is the action of the Supraspinatus?
    Stabilizes shoulder joint and abducts humerus
  23. What is the action of the Infraspinatus?
    Stabilizes shoulder joint and laterally rotates humerus
  24. What is the action of the Subscapularis?
    Stabilizes shoulder joint and medially rotates humerus
  25. What is the action of the Brachialis?
    Flexion of forearm
  26. What is the action of the Biceps brachii?
    • Flexion of forearm
    • Supination of forearm
  27. What is the action of the Triceps brachii?
    Extends forearm
  28. What is the action of the Anconeus?
    Extends forearm
  29. What is the action of the Brachioradialis?
    Flexes forearm
  30. What is the action of the Supinator?
    Supinates forearm
  31. What is the action of the Pronator teres?
    Pronates and flexes forearm
  32. What is the action of the Pronator quadratus?
    Pronates forearm
  33. What is the action of the Extensor carpi radialis longus?
    Extends and abducts hand at wrist
  34. What is the action of the Extensor carpi radialis brevis?
    Extends wrist
  35. What is the action of the Extensor carpi ulnaris?
    Extends and adducts hand at wrist
  36. What is the action of the Flexor carpi radialis?
    Flexes and abducts wrist
  37. What is the action of the Flexor carpi ulnaris?
    Flexes and adducts wrist
  38. What is the action of the Palmaris longus?
    Flexes wrist, tightens palmar aponeurosis
  39. What is the action of the Flexor digitorum superficialis?
    • Flexes PIP
    • Assists in MCP flexion
  40. What is the action of the Flexor digitorum profundus?
    Flexes DIP joints of digits
  41. What is the action of the Extensor digitorum?
    • Extends MCP joints of digits
    • assits in extension of IP joints
  42. What is the action of the Extensor indices?
    Extends index finger at MCP
  43. What is the action of the Extensor digiti minimi?
    • Extends MCP joint of pinky
    • Assits in extension of IP joints
  44. What is the action of the Extensor pollicis longus?
    Extends IP joint of thumb
  45. What is the action of the Extensor pollicis brevis?
    Extends MCP and CMC joints of thumb
  46. What is the action of the Abductor pollicis longus?
    Abducts thumb at CMC joint
  47. What is the action of the Flexor pollicis longus?
    Flexes IP of thumb
  48. What is the action of the Lumbricals 1,2?
    • Flexes MCP joints
    • Extends IP joints
  49. What is the action of the Lumbricals 3,4?
    • Flexes MCP joints
    • Extends IP joints
  50. What is the action of the Dorsal interossei 1-4?
    • Abduct digits from middle finger
    • Assist in flex MCP joints and extend IP joints
  51. What is the action of the Palmar interossei 1-3?
    • Adduct digits toward middle finger
    • Assist in flex MCP joints and extend IP joints
  52. What is the action of the Adductor pollicis?
    Adducts thumb toward middle finger @ CMC joint
  53. What is the action of the Abductor pollicis brevis?
    • Adducts thumb at CMC
    • Assists in opposition
  54. What is the action of the Flexor pollicis brevis?
    Flexes thumb at IP joint
  55. What is the action of the opponens pollicis?
    • Opposes thumb
    • Rotates thumb medially
  56. What is the action of the Abductor digiti minimi?
    Abducts pinky
  57. What is the action of the Flexor digiti minimi brevis?
    Flexes MCP joint of pinky
  58. What is the action of the Opponens digiti minimi?
    Opposes pinky to thumb
  59. What is the action of the Palmaris brevis?
    Tightens and corrugates skin over palm to improve grip

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