Shoulder O, I, A, N

Serratus Anterior Origin

Lateral Surface of Ribs 1-9

Serratus Anterior Insertion

Medial Boarder of the Scapula and Inferior Angle

Serratus Anterior Actions

Protraction of scapula and upward rotation of the scapula (hold scapula to rib cage)

Serratus Anterior Innervation

Long Thoracic Nerve

Descending Trapezius Origin

Occiput, Ligamentum Nuchae, S;inputs Process of C7

Descending Trapezius Insertion

Lateral 1/3 of the Clavicle and Acromion

Descending Trapezius Action

Upward rotation, elevation, and retraction of the scapula. Also does neck extension

Descending Trapezius Innervation

Spinal Accessory Nerve (Cranial Nerve XII)

Middle Trapezius Origin

Spinous Process of T1-T5

Middle Trapezius Insertion

Lateral Spine of the Scapula

Middle Trapezius Action

Retraction

Middle Trapezius Innervation

Spinal Accessory Nerve (cranial nerve XII)

Ascending Trapezius Origin

Spinous Process of T6-T12

Ascending Trapezius Insertion

Medial Spine of the scapula

Ascending Trapezius Action

Depression, retraction and upward rotation of scapula

Ascending Trapezius Innervation

Spinal Accessory Nerve (cranial nerve XII)

Rhomboid Major Origin

Spinous Process of T1-T4

Rhomboid Major Insertion

Medial Boarder of scapula to inferior boarder

Rhomboid Major Action

Retraction, downward rotation, and elevation

Rhomboid Major Innervation

Dorsal Scapular Nerve

Rhomboid Minor Origin

Spinous Process of C6-C7 and ligamentum nuchae

Rhomboid Minor Insertion

Medial superior boarder of the scapula

Rhomboid Minor Action

Retraction, downward rotation, and elevation of the scapula

Rhomboid Minor Innervation

Dorsal Scapular nerve

Lavatory Scapulae Origin

Transverse process of C1-C4

Levator Scapulae Insertion

Medial boarder of scapula near superior angle

Levator Scapulae action

Elevate scapula and downward rotation of scapula. (Lateral neck flexion, same side neck rotation, bilateral neck extension)

Levator Scapulae Innervation

Dorsal Scapular Nerve

Pectoralis Minor Origin

Ribs 3-5

Pectoralis Minor Insertion

Coracoid Process

Pectoralis Minor Action

Depression, downward rotation, and protraction of the scapula

Pectoralis Minor Innervation

Median pectoral nerve and branch from lateral pectoral nerve

Subclavius origin

First rib and cartilage

Subclavius insertion

Inferior surface of median 1/3 of clavicle

Subclavius action

Depress clavicle and bring it anterior. Also aides in 1st rib elevation and stabilizes the sternoclavicular joint

Subclavius Innervation

Subclavius nerve

Anterior/Clavicular Deltoid Origin

Lateral aspect of clavicle

Anterior/clavicular deltoid insertion

Deltoid tuberosity

Anterior/clavicular deltoid action

Abduction, internal rotation, horizontal adduction, and shoulder flexion

Anterior/clavicular deltoid Innervation

Axillary Nerve

Middle/Acromial deltoid origin

Acromion

Middle/acromial deltoid insertion

deltoid tuberosity

Middle/acromial deltoid action

Abduction

Middle/acromial deltoid Innervation

Axillary nerve

Posterior/spinal deltoid origin

Scapular spine

Posterior/spinal deltoid insertion

Deltoid tuberosity

Posterior/spianl deltoid action

Abduction, extension, external rotation, and horizontal abduction

Posterior/spinal deltoid Innervation

Axillary nerve

Supraspinatus Origin

Supraspinous fossa of scapula

Supraspinatus Insertion

Greater tubercle of humerus

Supraspinatus action

Abduction and stabilize head of humerus

Supraspinatus innervation

Subscapular nerve

Infraspinatus Origin

Infraspinous fossa of scapula

Infraspinatus insertion

Greater tubercle of humerus

Infraspinatus Action

Adduction and external rotation and stabilize head of humerus

Infraspinatus Innervation

Subscapular nerve

Teres minor origin

Lateral boarder of scapula

Teres minor insertion

Greater tubercle of humerus

Teres minor action

External rotation, adduction, and stabilize head of humerus

Teres minor innervation

Axillary nerve

Subscapularis origin

Subscapular fossa

Subscapularis Insertion

Lesser tubercle of the humerus

Subscapularis action

Internal rotation and stabilize head of humerus

Subscapularis Innervation

Upper and lower subscapular n

Latissimus Dorsi Origin

Thoracolumbar fascia (lumbar vertabra), Spines of T7-T12, iliac crest, sacrum, lower ribs, and inferior angle of the scapula

Latissimus dorsi insertion

Intertubercular groove

Latissimus dorsi action

Internal rotation, adduction, extension (coughing muscle)

Latissimus dorsi innervation

Thoracodorsal nerve

Teres major origin

Inferior angle of the lateral boarder of scapula

Teres major insertion

Crest of the lesser tubercle

Teres major action

Adduction, internal rotation, and extension

Teres Major innervation

Lower subscapular n

Pectoralis Major origin

Clavivular: medial 1/3 of clavicle

Sternal: Lateral edge of sternum and costocartilage of ribs 2-6

Abdominal: rectus sheath

Pectoralis major insertion

Crest of the greater tubercle

Pectoralis major action

Adduction, internal rotation, horizontal adduction, and shoulder flexion

Pectoralis major innervation

Lateral pectoral nerve and medial pectoral nerve

Coracobrachialis origin

Coracoid process

Coracobrachialis insertion

Middle 1/3 of humoral shaft

Coracobrachialis action

Flexion and adduction

Coracobrachialis innervation

Musculocutaneous

Biceps Brachii origin

Long head: Supraglenoid tubercle

Short head: Coracoid process of scapula

Biceps brachii insertion

Radial tuberosity and biceps aponeurosis

Biceps brachii action

Elbow flexion with supination, shoulder flexion, adduction (short head), and abduction with external rotation (long head)

Biceps Brachii Innervation

Musculocutaneous n

Triceps Brachii origin

Long head: infraglenoid tubercle

Lateral head: posterior surface of proximal humerus

Medial head: Posterior surface of distal humerus

Triceps brachii insertion

Olecranon process of ulna

Triceps brachii action

All: extension of the elbow

Long head: adduction and extension of the shoulder

Triceps Brachii Innervation

Radial n