Exam 4 Upper body

Trapezius - Action ⇢

Scapular retraction, rotation, elevation, depression

Trapezius - Innervation ⇢

Spinal accessory nerve

Trapezius - Origin ⇢

External occipital protuberance; ligamentum nuchae; spines C7-T12

Trapezius - Insertion ⇢

Scapular spine, acromion, lateral 1/3 of clavicle

Latissimus dorsi - Action ⇢

Adducts, extends, medially rotates arm; depresses scapula

Latissimus dorsi - Innervation ⇢

Thoracodorsal nerve

Latissimus dorsi - Origin ⇢

Iliac crest; T7-T12 spines; ribs 9-12

Latissimus dorsi - Insertion ⇢

Intertubercular sulcus of humerus

Levator scapulae - Action ⇢

Elevates scapula; downward rotation

Levator scapulae - Innervation ⇢

Dorsal scapular nerve (C5)

Levator scapulae - Origin ⇢

Transverse processes C1-C4

Levator scapulae - Insertion ⇢

Superior angle of scapula

Rhomboid major - Action ⇢

Scapular retraction

Rhomboid major - Innervation ⇢

Dorsal scapular nerve (C5)

Rhomboid major - Origin ⇢

Spines T2-T5

Rhomboid major - Insertion ⇢

Medial border of scapula

Rhomboid minor - Action ⇢

Scapular retraction

Rhomboid minor - Innervation ⇢

Dorsal scapular nerve (C5)

Rhomboid minor - Origin ⇢ Spines

C7-T1

Rhomboid minor - Insertion ⇢

Medial border of scapula

Deltoid - Action ⇢

Abducts, flexes, extends, medially & laterally rotates arm

Deltoid - Innervation ⇢

Axillary nerve

Deltoid - Origin ⇢

Lateral clavicle; acromion; spine of scapula

Deltoid - Insertion ⇢

Deltoid tuberosity of humerus

Teres major - Action ⇢

Extends, adducts, medially rotates arm

Teres major - Innervation ⇢

Lower subscapular nerve

Teres major - Origin ⇢

Inferior angle of scapula

Teres major - Insertion ⇢

Intertubercular sulcus of humerus

Pectoralis major - Action ⇢

Flexes, horizontally adducts, medially rotates arm

Pectoralis major - Innervation ⇢

Medial and lateral pectoral nerves

Pectoralis major - Origin ⇢

Medial clavicle; sternum; costal cartilages 1-6

Pectoralis major - Insertion ⇢

Greater tubercle; lateral lip of intertubercular sulcus

Pectoralis minor - Action ⇢

Depresses scapula; elevates ribs

Pectoralis minor - Innervation ⇢

Medial pectoral nerve

Pectoralis minor - Origin ⇢

Ribs 3-5 (anterior)

Pectoralis minor - Insertion ⇢

Coracoid process

Supraspinatus - Action ⇢

Initiates abduction

Supraspinatus - Innervation ⇢

Suprascapular nerve

Supraspinatus - Origin ⇢

Supraspinous fossa

Supraspinatus - Insertion ⇢

Greater tubercle

Infraspinatus - Action ⇢

Laterally rotates arm

Infraspinatus - Innervation ⇢

Suprascapular nerve

Infraspinatus - Origin ⇢

Infraspinous fossa

Infraspinatus - Insertion ⇢

Greater tubercle

Teres minor - Action ⇢

Laterally rotates arm

Teres minor - Innervation ⇢

Axillary nerve

Teres minor - Origin ⇢

Superolateral border of scapula

Teres minor - Insertion ⇢

Greater tubercle

Subscapularis - Action ⇢

Medially rotates arm

Subscapularis - Innervation ⇢

Upper & lower subscapular nerves

Subscapularis - Origin ⇢

Subscapular fossa

Subscapularis - Insertion ⇢

Lesser tubercle

Biceps brachii - Action ⇢

Flexes arm & forearm; supinates forearm

Biceps brachii - Innervation ⇢

Musculocutaneous nerve

Biceps brachii - Origin ⇢

Long head: supraglenoid tubercle; Short head: coracoid process

Biceps brachii - Insertion ⇢

Radial tuberosity

Coracobrachialis - Action ⇢

Flexes and adducts arm

Coracobrachialis - Innervation ⇢

Musculocutaneous nerve

Coracobrachialis - Origin ⇢

Coracoid process

Coracobrachialis - Insertion ⇢

Medial humeral shaft

Brachialis - Action ⇢

Flexes forearm

Brachialis - Innervation ⇢

Musculocutaneous nerve

Brachialis - Origin ⇢

Distal anterior humerus

Brachialis - Insertion ⇢

Coronoid process of ulna

Triceps brachii - Action ⇢

Extends forearm; extends arm at shoulder

Triceps brachii - Innervation ⇢

Radial nerve

Triceps brachii - Origin ⇢

Long head: infraglenoid tubercle; Lateral head: posterior proximal humerus; Medial head: posterior humeral shaft

Triceps brachii - Insertion ⇢

Olecranon proces