Shoulder Girdle- Origin, Insertion, Action, Innervation

Origin of Anterior Deltoid

Clavicle (Anterior Lateral Third)

Insertion of Anterior Deltoid

Deltoid Tuberosity (Humerus)

Action of Anterior Deltoid

Abduct, flex, medial rotates, horizontally adduct shoulder

Innervation of Anterior Deltoid

Axillary

Origin of Posterior Deltoid

Spine of Scapula

Insertion of Posterior Deltoid

Deltoid Tuberosity

Action of Posterior Deltoid

Abduct, extend, laterally rotates, horizontally abduct shoulder

Innervation of Posterior Deltoid

Axillary

Origin of Middle Deltoid

Acromion process and Spine

Insertion of Middle Deltoid

Deltoid Tuberosity (Humerus

Action of Middle Deltoid

Abduct Shoulder

Innervation of Middle Deltoid

Axillary

Origin of Trapezius

External Occipital protuberance C7-T12

Insertion of Trapezius

Lateral 1/3 clavicle, Acromion, Scapular spine

Action of Trapezius

Rotation, Retraction, Elevation, and Depression of Scapula

Innervation of Trapezius

Accessory Nerve and Cervical Spinal

Origin of Latissimus Dorsi

Lower vertebrae, Lower ribs, and Iliac Crests, Sacrum

Insertion of Latissimus Dorsi

Bicipital Grove (humerus)

Action of Latissimus Dorsi

Extend shoulder, Adduct Shoulder, and Medially Rotates

Innervation of Latissimus Dorsi

Thoracodorsal

Origin of Teres Major

Lower 1/3 of lateral border

Insertion of Teres Major

Lesser tubercle (humerus)

Action of Teres Major

Extend shoulder, Adduct Shoulder, and Medially Rotates

Innervation of Teres Major

Lower Subscapular

Origin of Supraspinatus

Supraspinatus Fossa of Scapula

Insertion of Supraspinatus

Greater Tubercle (Humerus)

Action of Supraspinatus

Abduct Shoulder and Stabilize head of Humerus

Innervation of Supraspinatus

Subscapular

Origin of Infraspinatus

Infraspinatus Fossa of Scapula

Insertion of Infraspinatus

Greater Tubercle (Humerus)

Action of Infraspinatus

External Rotation, Adduct Shoulder, and Stabilize head of humerus

Innervation of Infraspinatus

Subscapular

Origin of Teres Minor

upper 2/3 of Lateral Border

Insertion of Teres Minor

Greater Tubercle (Humerus)

Action of Teres Minor

External Rotation, Adduct Shoulder, and Stabilize head of humerus

Innervation of Teres Minor

Axillary

Origin of Subscapularis

Subscapular Fossa of Scapula

Insertion of Subscapularis

Lesser Tubercle (Humerus)

Action of Subscapularis

Internally Rotation and Stabilize head of humerus

Innervation of Subscapularis

Upper and lower subscapular

Origin of Rhomboid Major

Spinous Processes of T2 to T5

Insertion of Rhomboid Major

Medial border of scapula (between spine and inferior border)

Action of Rhomboid Major

Adduct Scapula, Elevate Scapula, and Downward rotation of Scapula

Innervation of Rhomboid Major

Dorsal Scapular

Origin of Rhomboid Minor

Spinous Processes of C7 to T1

Insertion of Rhomboid Minor

Medial border of scapula (across from spine)

Action of Rhomboid Minor

Adduct Scapula, Elevate Scapula, and Downward rotation of Scapula

Innervation of Rhomboid Minor

Cervical and Dorsal scapular

Origin of Levator Scapulae

Transverse processes C1 to C4

Insertion of Levator Scapulae

Medial border of scapula (superior angle)

Action of Levator Scapulae

Elevate Scapula, Downwardly rotate scapula, and laterally flex/rotate neck/extend neck

Innervation of Levator Scapulae

Cervical and Dorsal scapular

Origin of Serratus Anterior

Upper 8-9 ribs

Insertion of Serratus Anterior

Medial border of scapula (anterior surface)

Action of Serratus Anterior

Abduct scapula, Upward rotation of scapula, Depress scapula, and Holds medial border of scapula to rib cage

Innervation of Serratus Anterior

Long Thoracic

Origin of Pectoralis Major

Clavicle (medial ½), sternum, cartilage of ribs 1-6

Insertion of Pectoralis Major

Greater tubercle (humerus)

Action of Pectoralis Major

Adduct shoulder, internal rotation,

Elevate thorax during inhalation, flex shoulder (upper fibers), horizontally adduct (upper fibers), and extend shoulder (lower fibers)

Innervation of Pectoralis Major

Lateral/medial pectoral

Origin of Pectoralis Minor

Ribs 3-5

Insertion of Pectoralis Minor

Coracoid Process (medial surface)

Action of Pectoralis Minor

Depress Scapula, Abduct Scapula and Downward Rotation of Scapula

Innervation of Pectoralis Minor

Medial pectoral

Origin of Subclavius

1st rib costal cartilage

Insertion of Subclavius

Clavicle (inferior surface, middle 1/3)

Action of Subclavius

Depress Scapula, Elevate 1st rib, and Stabilize SC Joint

Innervation of Subclavius

Subclavian

Origin of Biceps Brachii

Coracoid Process (Short Head) and Supraglenoid tubercle (long head)

Insertion of Biceps Brachii

Radial Tuberosity

Action of Biceps Brachii

Flex the elbow, Supinate Forearm,

and Flex the shoulder

Innervation of Biceps Brachii

Musculocutaneous

Origin of Triceps

Infraglenoid Tubercle (Long Head), Humerus, posterior, proximal ½ (lateral head), and Humerus posterior, distal ½ (medial head)

Insertion of Triceps

Olecranon Process

Action of Triceps

Extend elbow

Innervation of Triceps

Radial

Origin of Coracobrachalis

Coracoid process

Insertion of Coracobrachalis

Humerus (medial surface, mid shaft)

Action of Coracobrachalis

Flex and Adduct Shoulder

Innervation of Coracobrachalis

Musculocutaneous