The extensor carpi ulnaris muscle is a long, slender muscle located in the forearm. It is situated on the medial side of the forearm, just above the wrist, and is one of the muscles that make up the extensor group of the forearm. The extensor carpi ulnaris muscle is responsible for extending and adducting the wrist, and is particularly important for movements that involve moving the hand away from the body or towards the little finger side of the hand.

In daily life, the extensor carpi ulnaris muscle is used in a variety of activities that involve moving the wrist and hand, such as writing, typing, and lifting objects. For example, when you hold a pencil and move your hand to write or draw, the extensor carpi ulnaris muscle helps to extend and rotate your wrist. Similarly, when you lift a heavy object and need to grip it securely, the extensor carpi ulnaris muscle helps to adduct your wrist and provide support. Overall, the extensor carpi ulnaris muscle is important for allowing us to move our wrists and hands in a wide range of directions.