Elbow OIAs

Biceps Brachi Origin

- Short head- coronoid process

- long head- suproglenoid tubercle of scapula

Biceps Brachi Insertion

-radial tuberosity

-biceps brachii aponeurosis

Biceps Brachi Action

-shoulder flexion

-elbow flexion and forearm supination

Brachialis origin

distal 2/3 of anterior humerus

Brachialis insertion

-Ulna tuberosity

-coronoid process

Brachialis action

Elbow Flexion

Brachioradialis Origin

upper 2/3 of lateral humeral supracondyle ridge

Brachioradialis Insertion

Lateral radius just proximal to base of styloid process

Brachioradialis Action

- Elbow Flexion

-Supination/Pronation to midposition

Triceps Brachii Origin

-Long head- infraglenoid tubercle

-Medial head- distal 2/3 of medial and posterior surfaces of humerus below radial groove

-lateral head- lateral & posterior surface of proximal 1/2 of body of humerus

Triceps Brachii Insertion

Posterior Surface of olecranon process

Triceps Brachii Action

- Shoulder long head Extension and Adduction

-Elbow extension

Pronator Teres origin

-medial humeral epicondyle

-coronoid process

Pronator Teres insertion

Lateral radius near its center

Pronator Teres action

-Forearm Pronation

-Elbow Flexion

Pronator Quadratus Origin

Distal Anterior Ulna

Pronator Quadratus Insertion

Distal 1/4 anterior radius

Pronator Quadratus Action

Forearm Pronation

Supinator origin

-Lateral humeral epicondyle

-LCL

-Annular Ligament

Supinator insertion

Lateral upper 2/3 of radius

Supinator Action

Forearm supination