Muscle - origin, insertion, action
Coracobrachialis - origin
Coracoid process of scapula
Trapezius - upper - action
Elevation Lateral (upward) rotation of scapula
Levator scapula - action
Elevation Medial (downward) rotation of scapula
Deltoid - posterior - action
Extension Horizontal abduction Lateral rotation Scaption of humerus
Coracobrachialis - action
Flexion Adduction of humerus
Subscapularis - origin
Subscapular fossa of scapula
2 Forearm extensors
Triceps Brachii Anconeus
Rhomboid major - action
Adduction (retraction) Medial (downward) rotation of scapula
Rhomboid major - insertion
Adduction (retraction) Medial (downward) rotation of scapula
Rhomboid minor - action
Adduction (retraction) Medial (downward) rotation of scapula
Trapezius - middle - action
Adduction (retraction) of scapula
Latissimus Dorsi - action
Extension Medial rotation Adduction of humerus Medial (downward) rotation of scapula Assists depression of scapula
Triceps Brachii - action
Extension of elbow Long head - extension of humerus
Brachioradialis - insertion
Styloid process of radius
Brachialis - insertion
Tuberosity of ulna Coronoid process of ulna
Subclavius - origin
1st rib costocartilage junction
Supraspinatus - action
Abduction Scaption of humerus Stabilization of head of humerus
Deltoid - middle - action
Abduction of humerus to 90 degrees
Deltoid - middle - origin
Acromion of scapula - lateral surface
Pectoralis Major - origin
Clavicular head: medial 1/2 of clavicle Sternocostal head: sternum cartilages of upper 6 ribs aponeurosis of external oblique muscle
Brachialis - action
Flexion of elbow
Teres Major - origin
Inferior angle of scapula (dorsal surface) Lower 1/3 of lateral border of scapula
Anconeus - origin
Lateral epicondyle of humerus
Pectoralis major - insertion
Lateral lip of bicipital (intertubercular) groove of humerus
Infraspinatus - action
Lateral rotation Extension of humerus
Subscapularis - insertion
Lesser tubercle of humerus
Triceps Brachii - origin
Long head - infraglenoid tubercle of scapula Lateral head - posterior humerus above spiral groove Medial head - posterior humerus below spiral groove
Teres Major - insertion
Medial lip of bicipital groove of humerus
Rhomboid major - origin
T2-T5 spinous processes
Latissimus Dorsi - origin
Thoracolumbar aponeurosis Lower 6 thoracic spinous processes Lower 3-4 ribs Inferior angle of scapula
7 Shoulder girdle muscles
Trapezius Rhomboids (major & minor) Levator scapula Serratus anterior Pectoralis minor Subclavius
Biceps Brachii - insertion
Tuberosity of radius Bicipital aponeurosis
Serratus anterior - insertion
Vertebral (medial) border of scapula (anterior surface of scapula)
Levator scapula - insertion
Vertebral (medial) border of scapula from superior angle to root of spine
Pectoralis minor - action
Abduction (protraction) Depression Medial (downward) rotation Anterior tilt of scapula Assists forced inhalation
Serratus anterior - action
Abduction (protraction) Lateral (upward) rotation of scapula Stabilizes scapula against chest wall Depression of scapula (lower fibers) Assists forced exhalation
Levator scapula - origin
C1-C4 transverse processes
Deltoids - insertion
Deltoid tuberosity of humerus
5 Gleno-Humeral muscles
Pectoralis major Deltoid Coracobrachialis Teres major Latissimus dorsi
Deltoid - posterior - origin
Spine of scapula
Anconeus - action
Assists extension of elbow..
Pectoralis minor - insertion
Coracoid process of scapula (medial border of superior surface)
Teres Major - action
Extension Medial rotation Adduction of humerus
Trapezius - upper - origin
External occipital protuberance Ligamentum nuchae
Deltoid - anterior - action
Flexion Horizontal adduction Medial rotation of humerus
Biceps Brachii - action
Flexion of elbow Supination of forearm Short head - flexion of humerus
Brachioradialis - action
Flexion of elbow w/forearm in mid-position (1/2 way between supination and pronation)
Infraspinatus - origin
Infraspinatus fossa of scapula
Teres minor - action
Lateral rotation Extension of humerus
Brachioradialis - origin
Lateral supracondylar ridge of humerus
Anconeus - insertion
Olecranon process and upper posterior surface of ulna
Teresa minor - origin
Upper 1/3 of axillary (lateral) border of scapula
Pectoralis major - action
Adduction Horizontal adduction Medial rotation of humerus Clavicular head: flexion of humerus Sternocostal head: extension of humerus assists in anterior tilt of scapula
Pectoralis minor - origin
Anterior surface of ribs 3-5 near costal cartilages
4 Forearm Flexors
Biceps Brachii Brachialis Brachioradialis Pronator Teres
Latissimus Dorsi - insertion
Bicipital groove of humerus
Rhomboid minor - origin
C7 and T1 spinous processes
Trapezius - middle - origin
C7-T3 spinous processes
Subclavius - action
Depresses clavicle Stabilizes sternoclavicular joint
Trapezius - lower - action
Depression Lateral (upward) rotation of scapula
Teres minor - insertion
Greater tubercle of humerus (inferior facet)
Infraspinatus - insertion
Greater tubercle of humerus (middle facet)
Supraspinatus - insertion
Greater tubercle of humerus (superior facet)
Pronator Teres - origin
Humeral head - medial epicondyle of humerus Ulnar head - coronoid process of ulna
Subclavius - insertion
Inferior shaft of clavicle - middle 1/3
4 Rotator cuff muscles
Infraspinatus Supraspinatus Subscapularis Teres minor
Deltoid - anterior - origin
Lateral 1/3 of clavicle
Trapezius - upper - insertion
Lateral 1/3 of clavicle Acromion of scapula
Serratus anterior - origin
Lateral surface of upper 8 ribs (by finger like slips)
Brachialis - origin
Lower 1/2 of anterior shaft of humerus
Subscapularis - action
Medial rotation Adduction of humerus
Coracobrachialis - insertion
Middle 1/3 of medial surface of humeral shaft
Pronator Teres - insertion
Middle of lateral shaft of radius
Triceps Brachii - insertion
Olecranon process of ulna
Pronator Teres - action
Pronation of forearm Assists in flexion of elbow
Rhomboid minor - insertion
Root of spine of scapula
Trapezius - lower - insertion
Root of spine of scapula
Biceps Brachii - origin
Short head - coracoid process of scapula Long head - supraglenoid tubercle of scapula
Trapezius - middle - insertion
Spine of scapula
Supraspinatus - origin
Supraspinatus fossa or scapula
Trapezius - lower - origin
T4-T12 spinous processes