MSA1 skeletal muscle.txt

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Author:
barbostick
ID:
72851
Filename:
MSA1 skeletal muscle.txt
Updated:
2011-03-17 23:05:54
Tags:
skeletal muscles Soma MSA1
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Description:
Soma MSA1 skeletal muscles
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  1. Fascia
    • Muscle covering; covers every muscle
    • The glue that keeps the body together
  2. Fascia forms... (2)
    Tendons & aponeuroses
  3. Purpose of fascia
    • Holds muscles in position
    • Separates adjacent muscles which allows muscles to move independantly
  4. Aponeuroses
    • Broad, fibrous sheet that connects muscle to muscle or bone to bone
    • Found on scalp, lower back, palm, soles of feet
  5. Muscle fiber
    Muscle cells
  6. 4 characteristics of muscle fibers
    • Thin
    • Elongated cylinder
    • Multinucleated
    • Striated
  7. Origin of a muscle
    Immovable end of the muscle, usually closer to the head. Can have multiple origins
  8. Insertion of a muscle
    Movable end of a muscle, usually closer to the feet
  9. When a muscle contracts, its insertion...
    Is pulled towards the origin
  10. Origins of biceps brachii
    Coracoid process of the scapula and supraglenoid tubercle
  11. Insertion of biceps brachii
    Radial tuberosity of the radius
  12. Action of biceps brachii
    Flexion of the elbow
  13. Agonist
    The prime mover; primarily responsible for the action.
  14. Synergists
    The helper muscles that assist the prime mover
  15. Antagonists
    Produce movement in the opposite direction of the prime mover; resists a prime movers actions
  16. Isometrics
    When prime mover and antagonist contract simultaneously, the structure thet act upon remains rigid
  17. Smooth movements of the body depend on...
    The antagonist relaxing and giving way to the prime movers when the prime movers contract
  18. Insertion and origin of Extensor Carpi Radialis Longus
    • Origin- distal 1/3 of lateral supracondylar ridge of the humerus
    • Insertion- base of 2nd metacarpal
  19. Action of Extensor Carpi Radialis Longus & Brevis
    • Extend the wrist
    • Abduct the wrist (radial deviation)
    • Assists flexion of the forearm and elbow
    • (ropy and superficial)
  20. Insertion and origin of Extensor Carpi Radialis Brevis
    • Origin- Lateral epicondyle of humerus (common extensor tendon)
    • Insertion- base of the 3rd metacarpal
  21. Origin and insertion of Extensor Digitorum
    • Origin- lateral epicondyle of the humerus (common extensor tendon)
    • Insertion- bases of middle and distal phalanges of the second to fifth digits (dorsal surface)
  22. Action of Extensor Digitorum
    • Extends second through fifth digits at MCP joints and IP joints
    • (ropy and superficial)
  23. Origin and insertion of Extensor Carpi Ulanaris
    • Origin- lateral epicondyle of the humerus (common extensor tendon)
    • Insertion- base of the fifth metacarpal (pinky)
  24. Action of Extensor Carpi Ulnaris
    • Extends wrist and adducts wrist (ulnar deviation)
    • (ropy and superficial)
  25. Skeletal muscle
    Organs made of skeletal muscle tissue, nervous tissue, blood and connective tissue.
  26. Three types of fascia
    superficial, deep, subserous
  27. Deep fascia
    • Fascia surrounding muscle
    • Continuous with subcutaneous fascia (lies beneath skin)
    • Allows muscles to independantly work within the same muscle
  28. Subserous fascia
    Surrounds organs and lubricates the cavity

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