Shoulder and Arm Muscles, Vessels and Nerve

Created by hiestekj 

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Anterior surface of medial half of clavicle; Anterior surface of sternum, superior 6 costal cartilages, aponeurosis of external oblique

Pectoralis Major Origin

Lateral lip of intertubercular groove

Pectoralis Major Insertion

Lateral pectoral nerve; Medial pectoral nerve, C5-T1

Pectoralis Major Innervation

Shoulder adduction, flexion, medial rotation; Scapular protraction

Pectoralis Major Action

3-5 ribs

Pectoralis Minor Origin

Medial border and superior surface of coracoid process

Pectoralis Minor Insertion

Medial pectoral nerve, C8-T1

Pectoralis Minor Innervation

Scapular protraction, stabilization

Pectoralis Minor Action

Superior surface of 1st rib at junction of rib and costocartilage

Subclavius Origin

Inferior surface of middle third of clavicle

Subclavius Insertion

Nerve to subclavius, C5-6

Subclavius Innervation

Clavicular depression

Subclavius Action

External surface of lateral part of ribs 1-8

Serratus Anterior Origin

Anterior surface of medial border of scapula

Serratus Anterior Insertion

Long thoracic nerve, C5-7

Serratus Anterior Innervation

Scapular protraction, stabilization

Serratus Anterior Action

Medial third of superior nuchal line, external occipital protuberance, nuchal ligament, C7-T12 spinous processes

Trapezius Origin

Lateral third of clavicle, acromion, spine of scapula

Trapezius Insertion

Motor from spinal accessory nerve, CN XI; Sensation from cervical nerves C3-4

Trapezius Innervation

Scapular elevation, retraction, depression

Trapezius Action

Spinous processes of T7-12 vertebrae, thoracolumbar fascia, iliac crest, inferior 3-4 ribs

Latissimus Dorsi Origin

Floor of intertubercular groove

Latissimus Dorsi Insertion

Thoracodorsal nerve, C6-8

Latissimus Dorsi Innervation

Shoulder extension, medial rotation, adduction

Latissimus Dorsi Action

C1-4 transverse processes

Levator Scapulae Origin

Superior part of medial border of scapula

Levator Scapulae Insertion

Dorsal scapular nerve, C5; Cervical nerves, C3-4

Levator Scapulae Innervation

Scapular elevation

Levator Scapulae Action

Nuchal ligament and C7-T1 spinous processes

Rhomboid Minor Origin

Medial border of scapula superior to spine

Rhomboid Minor Insertion

Dorsal scapular nerve, C4-5

Rhomboid Minor Innervation

Scapular retraction, stabilization

Rhomboid Minor Action

T2-5 spinous processes

Rhomboid Major Origin

Medial border of scapula inferior to spine

Rhomboid Major Insertion

Dorsal scapular nerve, C4-5

Rhomboid Major Innervation

Scapular retraction, stabilization

Rhomboid Major Action

Lateral third of clavicle, acromion, spine of scapula

Deltoid Origin

Deltoid tuberosity

Deltoid Insertion

Axillary nerve, C5-6

Deltoid Innervation

Shoulder flexion, medial rotation; Shoulder abduction; Shoulder extension, lateral rotation

Deltoid Action

Supraspinous fossa

Supraspinatus Origin

Superior facet of greater tubercle

Supraspinatus Insertion

Suprascapular nerve, C4-6

Supraspinatus Innervation

Initiation of shoulder abduction

Supraspinatus Action

Infraspinous fossa

Infraspinatus Origin

Middle facet of greater tubercle

Infraspinatus Insertion

Suprascapular nerve, C5-6

Infraspinatus Innervation

Shoulder lateral rotation

Infraspinatus Action

Superior part of lateral border of scapula

Teres Minor Origin

Inferior facet of greater tubercle

Teres Minor Insertion

Axillary Nerve, C5-6

Teres Minor Innervation

Shoulder lateral rotation

Teres Minor Action

Posterior surface of inferior angle of scapula

Teres Major Origin

Medial lip of intertubercular groove

Teres Major Insertion

Lower subscapular nerve, C6-7

Teres Major Innervation

Shoulder adduction, medial rotation

Teres Major Action

Subscapular fossa

Subscapularis Origin

Lesser tubercle

Subscapularis Insertion

Upper and lower subscapular nerves, C5-7

Subscapularis Innervation

Shoulder medial rotation, adduction

Subscapularis Action

Subclavian artery

Internal Thoracic Artery Origin

Subclavian artery

Thyrocervical Trunk Origin

Thyrocervical trunk

Suprascapular Artery Origin

Axillary artery

Superior Thoracic Artery Origin

Axillary artery

Thoracoacromial Artery Origin

Axillary artery

Lateral Thoracic Artery Origin

Axillary artery

Subscapular Artery Origin

Subscapular artery

Circumflex Scapular Artery Origin

Subscapular artery

Thoracodorsal Artery Origin

Axillary artery

Anterior Humeral Circumflex Artery Origin

Axillary artery

Posterior Humeral Circumflex Artery Origin

Brachial artery

Deep Brachial Artery Origin

Axillary artery

Brachial Artery Origin

Subclavian artery

Axillary Artery Origin

Brachial artery

Superior Ulnar Collateral Artery Origin

Brachial artery

Inferior Ulnar Collateral Artery Origin

Basilic vein, via median cubital vein; Axillary vein

Cephalic Vein Drainage

Basilic Vein

Median Cubital Vein Drainage

Brachial vein

Basilic Vein Drainage

Basilic Vein

Medial Antebrachial Vein Drainage

Lateral dorsal venous network

Cephalic Vein Origin

Medial dorsal venous network

Basilic Vein Origin

Skin on clavicle and superolateral shoulder

Supraclavicular Nerve Cutaneous Distribution

Skin on posterior arm

Posterior Brachial Cutaneous Nerve Distribution

Skin on posterior forearm

Posterior Antebrachial Cutaneous Nerve Distribution

C3-4

Supraclavicular Nerve Origin

Radial nerve

Posterior Brachial Cutaneous Nerve Origin

Radial nerve

Posterior Antebrachial Cutaneous Nerve Origin

Skin on middle part of lateral arm

Superior Lateral Brachial Cutaneous Nerve Distribution

Axillary nerve

Superior Lateral Brachial Cutaneous Nerve Origin

Skin on inferolateral arm

Inferior Lateral Brachial Cutaneous Nerve Distribution

Radial nerve

Inferior Lateral Brachial Cutaneous Nerve Origin

Skin on lateral forearm

Lateral Antebrachial Cutaneous Nerve Distribution

Musculocutaneous nerve

Lateral Antebrachial Cutaneous Nerve Origin

Skin on medial arm

Medial Brachial Cutaneous Nerve Distribution

Medial cord, C8-T1

Medial Brachial Cutaneous Nerve Origin

Skin on anterior, medial forearm

Medial Antebrachial Cutaneous Nerve Distribution

Medial cord, C8-T1

Medial Antebrachial Cutaneous Nerve Origin

Lateral cutaneous branch of 2nd intercostal nerve

Intercostobrachial Nerve Origin

Skin on medial arm

Intercostobrachial Nerve Cutaneous Distribution

C5 (C4)

Dorsal Scapular Nerve Origin

C5-7

Long Thoracic Nerve Origin

C5-6 (C4)

Nerve to Subclavius Origin

C5-6 (C4)

Suprascapular Nerve Origin

Lateral cord, C5-7

Lateral Pectoral Nerve Origin

Lateral cord, C5-7

Musculocutaneous Nerve Origin

Lateral and medial cords, C6-T1

Median Nerve Origin

Medial cord, C8-T1

Medial Pectoral Nerve Origin

Medial cord, C8-T1 (C7)

Ulnar Nerve Origin

Posterior cord, C5-6

Upper Subscapular Nerve Origin

Posterior cord, C6-8

Thoracodorsal Nerve Origin

Posterior cord, C5-6

Lower Subscapular Nerve Origin

Posterior cord, C5-6

Axillary Nerve Origin

Posterior cord, C5-T1

Radial Nerve Origin

Coracoid process; Supraglenoid tubercle

Biceps Brachii Origin

Radial tuberosity, antebrachial fascia

Biceps Brachii Insertion

Musculocutaneous nerve, C5-6

Biceps Brachii Innervation

Elbow flexion, shoulder flexion, forearm supination

Biceps Brachii Action

Distal half of anterior surface of humerus

Brachialis Origin

Coronoid process, ulnar tuberosity

Brachialis Insertion

Musculocutaneous nerve, C5-6

Brachialis Innervation

Elbow flexion

Brachialis Action

Coracoid process

Coracobrachialis Origin

Middle third of medial surface of humerus

Coracobrachialis Insertion

Musculocutaneous nerve, C5-7

Coracobrachialis Innervation

Shoulder flexion, adduction

Coracobrachialis Action

Infraglenoid tubercle; Posterior surface of humerus, superior to radial groove; Posterior surface of humerus, inferior to radial groove

Triceps Brachii Origin

Olecranon process, antebrachial fascia

Triceps Brachii Insertion

Radial nerve, C6-8

Triceps Brachii Innervation

Elbow extension, shoulder extension

Triceps Brachii Action

Lateral epicondyle

Anconeus Origin

Lateral olecranon, superoposterior ulna

Anconeus Insertion

Radial nerve, C7-T1

Anconeus Innervation

Elbow extension, stabilization; Abduction of ulna during pronation

Anconeus Action

Subclavian artery

Thyrocervical Trunk Origin

Supraglenoid tubercle; Coracoid process

Biceps Brachii Origin

Radial tuberosity, antebrachial fascia via bicipital aponeurosis

Biceps Brachii Insertion

Musculocutaneous Nerve, C5-6

Biceps Brachii Innervation

Elbow flexion, forearm supination, shoulder flexion

Biceps Brachii Action

Distal half of anterior surface of humerus

Brachialis Origin

Ulnar tuberosity, coronoid process

Brachialis Insertion

Musculocutaneous Nerve, C5-6

Brachialis Innervation

Elbow flexion

Brachialis Action

Coracoid process

Coracobrachialis Origin

Middle third of medial surface of humerus

Coracobrachialis Insertion

Musculocutaneous Nerve, C5-7

Coracobrachialis Innervation

Shoulder flexion, adduction

Coracobrachialis Action

Infraglenoid tubercle; Posterior humerus superior to radial groove; Posterior humerus inferior to radial groove

Triceps Brachii Origin

Olecranon process, antebrachial fascia

Triceps Brachii Insertion

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