shoulder muscles

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Author:
mmurphy
ID:
169896
Filename:
shoulder muscles
Updated:
2012-09-09 18:48:18
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Description:
Movement science palpation
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  1. Deltoid (clavicular part)
    • Origin:                                       Action:
    • Lat. 1/3 of clavicle                     Flex, Int. Rot., Abd.
    • Insertion: 
    • Humerus (deltoid tuberosity)
    • Nerve:
    • Axillary N. (C5,C6)
  2. Deltoid (Acromial part)
    • O: Acromion
    • I: Deltoid Tuberosity (Humerus)
    • N: Axillary N. (C5-C6)
    • A: Abduction
  3. Deltoid (Spinal part)
    • O: Scapular Spine
    • I: Deltoid Tuberosity (Humerus)
    • N: Axillary N. (C5-C6)
    • A: Extension, external rotation, abduction
  4. Supraspinatus
    • O: Scapula- Supraspinous Fossa
    • I: Humerus- Greater Tuberosity
    • N: Suprascapular N. (C4-C6)
    • A: Abduction
  5. Infraspinatus
    • O: Scapula- Infraspinous fossa
    • I: Humerus- Greater tuberosity
    • N: Suprascapular N. (C4-C6)
    • A: External Rotation
  6. Teres Minor
    • O: Scapula- Lateral border
    • I: Humerus- Greater Tuberosity
    • N: Axillary N. (C5,C6)
    • A: External Rotation; weak adduction
  7. Subscapularis
    • O: Scapula- Subscapular fossa
    • I: Humerus- lesser tuberosity
    • N: Subscapular N. (C5, C6)
    • A: Internal Rotation
  8. Pectoralis Major (Clavicular part)
    • O: Clavicle (medial 1/2)
    • I: Humerus (crest of greater tuberosity)
    • N: Medial & Lateral pectoral nn. (C5-T1)
    • A: adduction, internal rotation, flexion, assist w/ respiration
  9. Pectoralis Major (Sternocostal part)
    • O: sternum & costal cartilages 1-6
    • I: Humerus (crest of greater tuberosity)
    • N: Medial & Lateral pectoral nn. (C5-T1)
    • A: Adduction, internal rotation, flexion, assist w/ respiration
  10. Pectoralis Major (Abdominal part)
    • O: Rectus sheath (anterior layer)
    • I: Humerus (crest of greater tuberosity)
    • N: Medial & Lateral pectoral nn. (C5-T1)
    • A: Adduction, internal rotation
  11. Coracobrachialis
    • O: Scapula (Coracoid process)
    • I: Humerus (in line w/ crest of lesser tuberosity)
    • N: Musculocutaneous N. (C6, C7)
    • A: Flexion, Adduction, Internal Rotation
  12. Pectoralis Minor
    • O: 3rd-5th ribs
    • I: Coracoid Process
    • N: Medial & Lateral pectoralis nn. (C6-T1)
    • A: Draws scapula downward, rotates glenoid inferiorly, assists w/ respiration
  13. Serratus Anterior (Superior part)
    • O: 1st-9th ribs
    • I: Medial border of scapula
    • N: Long Thoracic N. (C5-C7)
    • A: lowers the raised arm, draws scapula laterally forward, elevates ribs when shld. is fixed
  14. Serratus Anterion (Intermediate part)
    • O: 1st-9th ribs
    • I: Medial border of scapula
    • N: Long Thoracic N. (C5-C7)
    • A: draws scapula laterally forward, elevates ribs when shld. is fixed
  15. Serratus Anterior (Inferior part)
    • O: 1st-9th ribs
    • I: Medial border of scapula
    • N: Long Thoracic N. (C5-C7)
    • A: rotates scapula laterally, draws scapula laterally forward, elevates ribs when shld. is fixed
  16. Trapezius (Descending part/ upper)
    • O: Occipital bone; spinous process (C1-C7)
    • I: Clavicle (lateral 1/3)
    • N: Accesory N. (CN X); cervical plexus (C3-C4)
    • A: draws Scapula medially upward, rotates glenoid cavity superiorly, Tilts head to same side and rotates to the opposite side; steadies Scapula on Thorax
  17. Trapezius (Transverse part/ middle)
    • O: Aponeurosis @ T1-T4 spinous processes
    • I: Acromion
    • N: Acessory N. (CN X); cervical plexus (C3-C4)
    • A: Draws Scapula medially; steadies Scapula on Thorax
  18. Trapezius (Ascending part/ lower)
    • O: Spinous process of (T5-T12)
    • I: Scapular spine
    • N: Acessory N. (CN X), cervical plexus (C3-C4)
    • A: Draws Scapula medially downward; steadies Scapula on Thorax
  19. Levator Scapulae
    • O: Transverse process of C1-C4
    • I: Scapuls (superior angle)
    • N: Dorsal Scapular N. (C4-C5)
    • A: Draws Scapula medially upward while moving the inferior angle medially; inclines neck to same side
  20. Rhomboid Minor
    • O: Transverse process of C1-C4
    • I: Scapula (Medial border above Scapula spine)
    • N: Dorsal Scapular N. (C4-C5)
    • A: Steadies Scapula; draws it medially upward
  21. Rhomboid Major
    • O: Spinous process of (T1-T4)
    • I: medial border of Scapula (below spine)
    • N: Dorsal scapular N.(C4-C5)
    • A: steadies scapula; draws it medially upward

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