Pectoral Muscles Flashcards
Action at pectoral girdle: depression
Pectoralis minor, trapezius
Action at pectoral girdle: protraction
Pectoralis minor, serratus anterior
Action at pectoral girdle: retraction
Trapezius, rhomboid major and minor
Action at pectoral girdle: lateral rotation
Serratus anterior, trapezius
Action at pectoral girdle: medial rotation
Levator scapulae, rhomboid major and minor
Pectoralis major
Adducts medially rotates humerus, flexes humerus
Pectoralis minor
Protracts , depresses, stabilizes scapula
Serratus anterior
Protracts scapula, rotates scapula laterally/upward
Subclavius
Anchors and depresses clavicle
Action at glenohumeral joint: flexion
Deltoid, pectoralis major, coracobrachialis, short head of biceps brachii
Action at glenohumeral joint: extension
Deltoid, latissimus dorsi, teres major, long head of triceps brachii
Action at glenohumeral joint: abduction
Supraspinatus (initiates and assists in first 15 degrees), deltoid (fully effective after first 15 degrees)
Action at glenohumeral joint: adduction
Pectoralis major, latissimus dorsi, teres major, long head of triceps brachii
Action at glenohumeral joint: internal (medial) rotation
Deltoid, pectoralis major, latissimus dorsi, teres major, subscapularis
Action at glenohumeral joint: external (lateral) rotation
Deltoid, infraspinatus, teres minor
Deltoid
Flexes and medially rotates arm, abducts arm, extends and laterally rotates arm
Teres major
Adducts and medially rotates arm
Supraspinatus
Initiates and assists deltoid in abduction of arm
Infraspinatus
Lateral rotation of arm
Action at pectoral girdle: elevation
Trapezius, levator scapulae
Teres minor
Lateral rotation of arm
Subscapularis
Medially rotates and adducts arm
