Muscles and innervation of shoulder girdle and upper extremity Flashcards
(93 cards)
I of Pectoralis major
Greater tubercule and lateral lip of intertubercular groove of humerus
O clavicular head of Pectoralis Major m.
Medial clavicle
O of sternal head of Pectoralis major m.
Sternum and costal cartilages of ribs 2-6
Action of Pectoralis major m.
Flexion, Medial rotation and adduction of humerus
Innervation of Pectoralis major m.
Medial and lateral pectoral n.
O of Pectoralis minor m.
Ribs 2-5 (sometimes 3-5 or 2-4) near their costal cartilages
I of Pectoralis minor m.
Coracoid process of Scapula
Action of Pectoralis minor m.
Abduction, downward rotations of scapula & assists in elevation of ribs when pectoral girdle is fixed
Innervation of Pectoralis minor m.
Medial pectoral n.
O of Subclavius m.
1st rib
I of Subclavius m.
Subclavian groove of Clavicle
Action of Subclavius m.
Depress clavicle
Innervation of subclavius m.
Subclavian n.
O of Serratus anterior m.
Ribs 1-8 (sometimes 1-9)
I of Serratus anterior m.
Medial border & inferior angle of scapula
Action of Serratus anterior m.
Abduction & upward rotation of Scapula (protraction)
Innervation of Serratus anterior m.
Long thoracic n.
O of Serratus posterior superior m.
Ligament nuchea & spinous processes of C7-T3 vertebrae
I of Serratus posterior superior m.
Superior border of ribs 2 to 4
Action of Serratus posterior superior m.
Elevation of ribs
Innervation of Serratus posterior superior m.
2-5 intercostal n.
O of Serratus posterior inferior m.
Spinous processes of T11-L12 vertebrae
I of Serratus posterior inferior m.
Inferior borders of ribs 8-12 near their angles
Action of Serratus posterior inferior m.
Depression of ribs