Group 3

• O: long head: infraglenoid tubercle(scapula)
• lateral head: posterior humerus, superior to radial groove
• medial head: posterior humerus , inferior to the radial groove

I: olecranon process and forearm fasica

A: extend forearm at the elbow, shoulder extension

O: proximal 2/3 of the lateral supracondylar ridge

I: lateral aspect of distal radius

A: flexion the forearm at the elbow

• O: long head: supraglenoid tubercle (scapula)
• short head: coracoid process

I: radial tuberosity and fascia of the forearm via bicipital aponeurosis

A: supinate the forearm, flexes the elbow, flexes the glenohumeral joint

O: distal half of the anterior surface of the humerus

I: coronoid process and ulnar tuberosity

A: flexes the elbow

O: coracoid process of scapula

I: middle third of the medial aspect of humerus

A: assissts in flexion and adduction of glenohumeral joint