Pronator teres is the muscle of forearm.The word pronator refers to as side to side movement of limb and teres refers to as round and long muscle or ligament.
The pronator teres pronates the forearm ie turns the forearm so that the palm faces posteriorly.It comprises of two heads: Humeral (larger and superficial,arises from the medial part of supracondylar ridge) and Ulnar ( thin fasicle and arises from the medial side of coronoid process of ulna).
Pronator teres is supplied by Medial nerve.