Muscles of Upper Extremity

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Author:
xdiabx
ID:
112627
Filename:
Muscles of Upper Extremity
Updated:
2011-10-27 13:59:20
Tags:
Shoulder Elbow Wrist Hand
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Description:
Muscle groups, motions, muscles, joints, tendons
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  1. Synergests of Shoulder Flexion
    • Deltoid (anterior fibers)
    • Pectoralis Major (upper fibers)
    • Biceps Brachii
    • Coracobrachialis
  2. Synergists of Shoulder Extension
    • Deltoid (posterior fibers)
    • Latissimus Dorsi
    • Teres Major
    • Pectoralis Major (lower fibers)
    • Triceps Brachii (long head)
  3. Synergists of Shoulder: Horizontal Abduction
    Deltoid (posterior fibers)
  4. Synergists of Shoulder Horizontal Adduction
    • Deltoid (anterior fibers)
    • Pectoralis Major (upper fibers)
  5. Synergists of Shoulder Abduction
    • Deltoid (all fibers)--mostly middle fibers
    • Supraspinatus
  6. Synergists of Shoulder Adduction
    • Latissimus Dorsi
    • Teres Major
    • Infraspinatus
    • Teres Minor
    • Pectoralis Major (all fibers)
    • Triceps Brachii (long head)
    • Coracobrachialis
  7. Synergists of Shoulder: External (lateral) Rotation
    • Deltoid (posterior fibers)
    • Infraspinatus
    • Teres Minor
  8. Synergists of Shoulder: Medial Rotation
    • Deltoid (anterior fibers)
    • Latissimus Dorsi
    • Teres Major
    • Subscapularis
    • Pectoralis Major (all fibers)
  9. Scapula: Synergists of Elevation
    • Trapezius (upper fibers)
    • Rhomboid Major
    • Rhomboid Minor
    • Levator Scapula
  10. Scapula: Synergists of Depression
    • Trapezius (lower fibers)
    • Serratus Anterior (with the origin fixed)
    • Pectoralis Minor
  11. What is the Shoulder Joint Called?
    Glenohumeral Joint
  12. What is the joint of the Scapula?
    Scapulothoracic Joint (S/T Joint)
  13. Scapula: Synergists of Adduction (retraction)
    • Trapezius (middle fibers)
    • Rhomboid Major
    • Rhomboid Minor
  14. Scapula: Synergists of Abduction (protraction)
    • Serratus Anterior (with the origin fixed)
    • Pectoralis Minor
  15. Scapula: Synergists of Upward Rotation
    • Trapezius (upper & lower fibers)
    • Serratus Anterior (with the origin fixed)
  16. Scapula: Synergists of Downward Rotation
    • Rhomboid Major
    • Rhomboid Minor
    • Levator Scapula
    • Pectoralis Minor
  17. What is the ACTION of the DELTOID
    -all fibers, anterior fibers, & posterior fibers
    • All Fibers: Abduct the shoulder
    • Anterior Fibers: Flex, medially rotate, & horizontally adducts the shoulder
    • Poserior Fibers: extend, laterally rotate & horzontally abduct the shoulder
  18. Deltoid (OIN)
    • Origin: Lateral 1/3 of clavicle, acromion & spine of scapula
    • Insertion: Deltoid Tuberosity
    • Nerve: Axillary C5,6
  19. What is the ACTION of the TRAPEZIUS?
    -bilaterally
    -unilaterally
    -middle fibers
    -lower fibers
    • Bilaterally: Extends the head & neck
    • Unilatterally: laterally flexes & rotates the head & neck, elevates & upwardly rotates the scapula
    • Middle Fibers: Adducts & stabilizes the scapula
    • Lower Fibers: Depresses & upwardly rotates the scapula
  20. Action of the Middle Fibers of the Trapezius
    Adducts & Stabilizes the Scapula
  21. Trapezius (OIN)
    • Origin: External Occipital Protuberance, medial portion of Superior Nuchal Line of Occiput, Ligamentum Nuchae & C-7 to T-12
    • Insertion: Lateral 1/3 of clavicle, acromion & spine of scapula
    • Nerve: Spinal portion of Cranial Nerve XI (accessory) & Ventral Ramus C2,3,4

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