[image]Pectoralis Major

Origin: Lateral border of the body and manubrium of the sternum and medial third of the clavicle

Insertion: Biciptal groove of the humerus

Action: Horizontal adduction, flextion, internal rotation, and adduction

Nerve Innervation: Pectoral nerve

[image]  Pectoralis Minor

Origin: Anterior and lateral position on ribs 3-5

Insertion: Coracoid process

Action: Depression, downward rotation, protraction and scapular tilt

Nerve innervation: Median pectoral nerve

[image]  Coracobrachialis

Origin: Lateral portion of the coracoid process

Insertion: Anteromedial humerus at approximately half the distance

Action: Shoulder flexion

Nerve Innervation: Musculocutaneous nerve

[image]  Coracobrachialis

Origin: Lateral portion of the coracoid  process

Insertion: Anteromedial humerus at approximately half the distance

Action: Shoulder flexion

Nerve Innervation: Musculocutaneous nerve

[image]Anterior Deltoid

Origion: The lateral third of the clavicle

Insertion: Deltoid tuberosity

Action: Abduction, shoulder flexion, horizontal adduction, and internal rotation

Nerve innervation: Axillary nerve 

[image]

Middle Deltoid

Origion: Acromion process

Insertion: Deltoid tuberosity

Action: True abduction

Nerve Innervation: Axillary nerve

[image]  Posterior Deltoid

Origin: Lateral half of the spine of the scepula

Insertion: Deltoid tuberosity

Action: Abduction, shoulder extension, horizontal abduction, and external rotation

Nerve Innervation: Axillary nerve

[image] Posterior Deltoid

Origin: Lateral half of the spine of the scapula

insertion: Deltoid tuberosity

Action: Abduction, shoulder extension, horizontal abduction, and external rotation

Nerve Innervation: Axillary nerve

[image]Latissimus Dorsi

Origin: Spinous processes of T7-L5, the sacrum, and the medial portion of the ischium

Insertion: Bicipital groove of te humerus

Action: Internal rotation, adduction, horizontal abduction, and extension

Nerve Innervation: Thoracodorsal nerve

[image]Teres Major

Origin: Inferior angle of the scapula

Insertion: lesser tubercle

Action: Internal rotation, adduction, horizontal abduction and extension

Nerve Innervation: Suprascapular nerve

[image]Teres Minor

Origin: Middle third of the lateral scapula border

Insertion: Greater tubercle

Action: Adduction and external rotation

Nerve Innervation: Suprascapular nerve

[image]Infraspinatus

Origin: Infraspinous fossa

Insertion: Posterosuperior greater tubercle

Action: Horizontal abducation and external rotation

Nerve Innveration: Suprascapular nerve

[image]Superaspinatus

Origin: Suoraspinous fossa

Insertion: Superior aspect of the greater tubercle

Action: Abduction

Nerve Innervation: Suprascapular  nerve

[image]

 Subscapularis

Origin: Subscapular fossa

Insertion: Lesser tubercle of the humerus

Action: Internal rotation

Nerve Innervation: Upper and lower subcapular nerve

[image]   Brachialis

Origin: Distal third of anterior humerus

Insertion: Ulnar tuberosity of the ulna

Action: Elbow flexion

Nerve Innervation: Musculocutaneous  nerve

[image]Brachioradialis

Origin:Supracondylar ridge of the humerus

Insertion: Styloid process of the radius

Action: Elbow flexion( especially when radioulnar joint is in position midway between supination ans pronation)

Nerve innervation: Radial nerve.

[image]Supinator

Origin: Lateral epicondyle of the humerus and supinator of the ulna

Insertion: Proximal end of the lateral surface

Action: Supination of the forearm

Nerve Innarvation: Radial nerve

[image]Pronator Teres

Origin: Medial epicondyle of the humerus and medial side of the ulna

Insertion: Lateral surface of the radius

Action: Pronation of the forearm, weak elbow flexion

Nerve Innervation: Median nerve

[image]Pronator Quadratus

Origin: Distal end of the anterior ulna

Insertion: Distal end of anterior radius

Action: Pronation of the forearm

Nerve Innervation: Median nerve

[image]Flexor Carpi Radialis

Origin: Medial epicondyle of the humerus

Insertion: Second and third metacarpal bones

Action: Wrist flexion and radial deviation

Nerve Innervation: Median Nerve

[image]Flexor Carpi Ulnaris

Origin: Medial epicondyle of the humerus

Insertion: Pisiform, hamate, and fifth metacarpal bone

Action: Wrist flexion and ulna deviation

Nerve Innervation: Ulnar nerve

[image]Palmaris Longus

Origin: Medial epicondyle of humerus

Insertion: Third metacarpal bone and the palmar aponeurosis

Action: Wrist flexion

Nerve Innervation: Median nerve.

[image]Extensor Carpi Radialis Longus

Origin: Lateral epicondyle

Insertion: Second metacarpal bone

Action: Wrist extension and radial deviation

Nerve Innervation: Radial nerve

[image] Extensor Carpi Radialis Brevis

Origin: Lateral epicondyle

Insertion: Third metacarpal

Action: Wrist extension

Nerve Innervation: Radial nerve

[image]Extensor Carpi Ulnaris

Origin: Lateral epicondyle

Insertion: Fifth metacarpal bone

Action: Wrist extension and ulnar deviation

Nerve Innervation: Radial nerve

[image]Flexor Digitorum Superficialis

Origin: Medial epicondyle of of the humars, cornoid process, radial tuberosity

Insertion: Middle phalanges of  digits 2-5

Action: Finger flexion, assists in wrist flexion, weak elbow flextion

Nerve Innervation: Median nerve

[image]Flexor Digitorum Profundus

Origin: Upper three-fourths of the anterior surface of the ulna and interosseus membrance

Insertion: Digits 2-5 the base ofthe distal phalanges

Action: Flexion of the distal interphalangeal joint, whole finger flexion, wrist flexion

Nerve Innervation: Digits 2 and 3: medain nerve: digits 4 and 5: ulna nerve

[image]Flexior Pollicis Longus

Origin: Anterior surface of the radius on the distal half

Insertion: Distal phalanx of the thumb at the base

Action: Flexion of the thumb: weist flexion

Nerve Innervation: Median nerve

[image]Extensor Digiti Minimi

Orign: Lateral epicondyle of the humerus

Insertion: Distal phalanx of digit 5

Action: Extension of all joints of digit 5

Nerve Innervation: Radial nerve

[image]Extensor Indicis

Origin: Distal third of the posterior ulna

insertion: Distal phalanx of the index finger at base

Action: extension of the index finger, weak wrist extension

Nerve Innervation: Radial nerve

[image]Extensor Pollicis Longus

Origin: Posterior lateral surface of the ulna

Insertion: Distal phalanx of the thumb at the base

Action: Extension of the thumb, extension of the wrist

Nerve Innervation: Radial nerve

[image]

Extensor Pollicis Brevis

Origin: Posterior surface of the distal radius

Insertion: Proximal phalanx of the thumb on the distal side

Action: Extension of the thumb at the metacarpal phalangeal joint, weak wrist extension

Nerve Innervation: Radial nerve

[image] Abductor Pollicis Longus

Origin: Posterior radius and ulna

Insertion: Base of first metacarpal

Action: Thumb abduction

 Nerve Innervation: Radial Nerve

[image] Flexor Pollicis Brevis

Origin: Flexor retinaculum and trapezium bones

Insertion: The base of the proximal phalanx of the thumb

Action: Thumb flexion

Nerve innervation: Median nerve

[image]Abductor Pollicis Brevis

Origin: Flexor retinaculum, scaphoid, and trapezium

Insertion: The base of the proximal phalanx of the thumb

 Action: Thumb abduction

Nerve Innervation: Median nerve

[image]Opponens Pollicis

Origin: Flexor retinaculum, trapezium bone

Insertion: The head of the first metacarpal bone

Action: Thumb opposition

Nerve Innervation: Median nerve

[image]  Flexor Digiti Minimi

Origin: Flexor retinaculum, hamate bone 

Insertion: Base of the proximal phalanx of the fifth finger

Action: Flexion of the fifth finger

Nerve Innervation: Ulnar nerve

[image]Opponens Digiti Minimi

Origin: Flexor retinaculum, hamate bone

Insertion: Lateral surface of the head of the fifth metacarpal bone

Action: Assists with opposition of the fifth finger

Nerve Innervation: Ulnar nerve

[image]Adductor Pollicis

Origin: Trapezium, trapezoid, and metacarpal bones ii and iii

Insertion: Medial surface of the base of the proximal phalanx of the first finger

Action: Adduction of the first finger

Nerve Innervation: Ulnar nerve

[image]  Interossei

Origin: Bilaterally on the base of the metacarpals digits I-V

Insertion: Base of the proximal phalanx of digits I-V

Action: Abduction away from the middle finger

Nerve Innervation:Ulnar nerve

[image]Lumbricals

Origin: Distal tendon of the flexor digitorum profundus muscle

Insertion: Lateral, proximal base of the proximal phalanx of digits II-V

Action: Flex metacarpophalangeal joints and extends IP joints

Nerve Innervation: Median and ulnar nerve

[image]Elbow Extensors( Triceps Brachii)

Origins:Lateral head: approximately half way down the humerus on the posterior surface

Long head: infaglenoid tubercle on the lateral border of the scapula

Medial head: Distal two-thirds of the posterior and medial humerus

Insertion: All heads insert via a cetral tendon on the olecranon process of ulna

Action: Elbow extension, extension o shoulder joint

Nerve Innervation: All heads are innervated by the radial nerve