UE Origin, Insertion, Action, Innervation

coracobrahialis origin

coracoid process

Coracobrachialis insertion

medial surface of humerus

coracobrachialis action

flexion, adduction, and horizontal adduction at shoulder joint

coracobrachialis innervation

musculocutaneous nerve (mainly C7)

deltoid middle origin

acromion

deltoid insertion

deltoid tuberosity

deltoid action

extension, horizontal adduction, and lateral rotation

deltoid innervation

Axillary nerve (C5, C6)

infraspinatus origin

infraspinous fossa

infraspinatus insertion

greater tubercle of humerus

infraspinatus action

lateral rotation, abduction, and horizontal abduction

infraspinatus innervation

Suprascapular nerve (C5, C6)

pectoralis major origin

clavicular head - clavvicle, sternal head-sternum and costal cartilage

pectoralis major insertion

intertubercular groove of humerus

pectoralis major action

adduction, horizontal adduction

pectoralis major innervation

medial and lateral pectoral nerves (C5-T1)

subscapularis origin

subscapular fossa

subscapularis insertion

lesser tubercle of humerus

subscapularis action

medially rotates arm

subscapularis innervation

upper and lower subscapular nerves (c5, c6)

supraspinatus origin

supraspinous fossa of scapula

supraspinatus insertion

greater tubercle of humerus

supraspinatus action

abducts arm

supraspinatus innervation

Suprascapular nerve (C5, C6)

teres major origin

inferior angle of scapula

teres major insertion

intertubercular groove

teres major action

extension, adduction, medial rotation, and horizontal abduction of the arm

teres major innervation

lower subscapular nerve (c5, c6)

teres minor origin

lateral border of scapula

teres minor insertion

greater tubercle of humerus

teres minor action

lateral rotation and horizontal abduction of arm

teres minor innervation

axillary nerve (c5-c6)

latissiumus dorsi origin

spinous process of vertebrae and the sacrum

latissimus dorsi insertion

intertubercular groove of humerus

latissiumus dorsi action

extension, adduction

latissimus dorsi innervation

Thoracodorsal nerve (C6-C8)

biceps brachii long head origin

supraglenoid tubercle of scapula

biceps brachii long head insertion

radial tuberosity

biceps brachii long head action

flexion and supination of forearm; flexion of arm at shoulder.

biceps brachii long head innervation

Musculocutaneous nerve (C5, C6)

triceps brachii long head origin

infraglenoid tubercle

triceps brachii long head insertion

olecranon process of ulna

triceps brachii long head action

extension of forearm at elbow joint; extension and adduction of the arm at the shoulder joint

triceps brachii long head innervation

Radial nerve (C6-C8)

Subclavius origin

1st rib

subclavius insertion

inferior surface of clavicle

subclavius action

depresses clavicle

subclavius innervation

cervical nerves (C5,C6)

levator scapulae origin

transverse processes of C1-C4

levator scapulae insertion

superior angle of scapula

levator scapulae action

elevation and downward rotation of scapula

levator scapulae innervation

dorsal scapular nerve (C5)

pectoralis minor origin

ribs 3-5

pectoralis minor insertion

coracoid process

pectoralis minor action

depression, downward rotation, and abduction of the scapula; elevation of the ribs

pectoralis minor innervation

Medial pectoral nerve (C8, T1)

Rhomboids (major and minor) origin

spinous processes of C7 and T1-T5

Rhomboids (major and minor) insertion

vertebral border of scapula from spine of scapula to inferior angle

Rhomboids (major and minor) action

adduction, downward rotation, elevation

Rhomboids (major and minor) innervation

dorsal scapular nerve (c5)

serratus anterior origin

ribs 1-9

serratus anterior insertion

medial border of scapula

serratus anterior action

depression, abduction, and upward rotation of the scapula; elevation of the ribs

serratus anterior innervation

long thoracic nerve (c5-c7)

Trapezius Origin

occipital bone and spines of cervical and thoracic vertebrae

Trapezius Insertion

clavicle, acromion, spine of scapula

trapezius action

elevation and upward rotation of scapula and extension and lateral flexion of neck; adduction of scapula; depression and upward rotation of scapula

Trapezius Innervation

accessory nerve

biceps brachii origin

supraglenoid tubercle of scapula

biceps brachii insertion

radial tuberosity

biceps brachii action

flexion and supination of the forearm at the elbow; flexion of the arm at the shoulder joint

biceps brachii innervation

musculocutaneous nerve (C5, C6)

brachioradialis origin

lateral epicondyle of humerus

brachioradialis insertion

styloid process of radius

brachioradialis action

flexion of forearm at elbow joint

brachioradialis innervation

radial nerve (c5,c6)

brachialis origin

Distal half of anterior surface of humerus

brachialis insertion

ulnar tuberosity and coronoid process

brachialis action

flexes forearm

brachialis innervation

Musculocutaneous nerve (C5, C6) and branch of radial nerve

pronator quadratus origin

anterior surface of distal ulna

pronator quadratus insertion

anterior surface of distal radius

pronator quadratus action

pronates hand

pronator quadratus innervation

medial nerve (c8, t1)

pronator teres origin

medial epicondyle of humerus and cornoid process of ulna

pronator teres insertion

lateral surface of radius

pronator teres action

pronation and flexion of the forearm

pronator teres innervation

median nerve (c6 and c7)

Supinator origin

lateral epicondyle of humerus *

supinator insertion

dorsal and lateral surfaces of the body of the radius

supinator action

supinates the hand and forearm by rotating the radius around the ulna

supinator innervation

deep radial nerve (c6)

Extensor carpi radialis brevis origin

lateral epicondyle of humerus

Extensor carpi radialis brevis insertion

dorsal base of 3rd metacarpal

Extensor carpi radialis brevis action

extends and abducts wrist

Extensor carpi radialis brevis innervation

Radial nerve (C6, C7)

Extensor carpi radialis longus origin

lateral supracondylar ridge of humerus

Extensor carpi radialis longus insertion

base of 2nd metacarpal

Extensor carpi radialis longus action

extends and abducts wrist

Extensor carpi radialis longus innervation

Radial nerve (C6, C7)