The Extensor Carpi Ulnaris is a muscle located in the forearm. It plays a crucial role in extending and adducting the wrist, allowing for movements such as waving or gripping. This muscle originates from the lateral epicondyle of the humerus and inserts into the base of the fifth metacarpal bone. This muscle is part of the extensor group, which includes other muscles that help in wrist and finger movements. Proper functioning of the Extensor Carpi Ulnaris is essential for activities that require wrist stability and strength, making it important for daily tasks and sports.