Shoulder Flashcards
Pectoralis Major Origin
Clavicular: Ant/Medial Clavicle
Sternocostal: Ant Sternum, 1-6 costal cartridges, aponeurosis of oblique muscle
Pectoralis Major Insertion
Intertubercular groove humerus
Pectoralis Major Innervation
Lateral and medial pectoral nerves
Pectoralis Major Action
Flexes, adducts, and medially rotates arm
Pectoralis Minor Origin
Ribs 3-5
Pectoralis Minor Insertion
Coracoid Process
Pectoralis Minor Innervation
Medial Pectoral Nerve
Pectoralis Minor Action
Protraction, lowers lateral angle of scapula
Serratus Anterior Origin
Ribs 1-9
Serratus Anterior Insertion
Medial border of the scapula
Serratus Anterior Innervation
Long thoracic nerve
Serratus Anterior Action
protracts and rotates scapula and holds against thoracic wall
Trapezius Origin
Superior nuchal line, external occipital protuberance nuchal ligament, spinous processes of C7-T12
Trapezius Insertion
Lateral 1/3rd of clavicle, acromion, and spine of the scapula
Trapezius Innervation
Accessory nerve
Trapezius Action
Elevates, retracts, and rotates scapula; lower fibers depress scapula
Latissimus Dorsi Origin
Spinous process T7-T12, L1-L5, sacrum, inferior scapula, posterior 1/3 iliac crest, ribs 9-12, throacolumbar fascia
Latissimus Dorsi Insertion
Intertubicular Groove
Latissimus Dorsi Innervation
Thoracodorsal nerve
Latissimus Dorsi Action
Extends, adducts, and IR humerus
Rhomboid Major and Minor Origin
Spinous process T2-T5
Rhomboid Major and Minor Insertion
Medial border scapula
Rhomboid Major and Minor Innervation
Dorsal Scapular Nerve
Rhomboid Major and Minor Action
Fixes scapula to thoracic wal and retracts and rotates it to depress glenoid cavity
Levator Scapulae Origin
Transverse process C1-C4