Procedural memory refers to knowledge of certain activities or procedures, which eventually become automatic through repetition and practice. This type of memory is often used without conscious thought or planning, and therefore very difficult to verbalize. Often the best way to explain clearly the procedural memory is to perform a task or action. Examples of such memories is riding a bike, swim, or how to play a kind of music instrument.The of knowledge as procedural memory often last for a long time. For example, when a person has learned to ride a bike, he or she can not ride a bike for many years, but the memory back instantly when the bike is attempted. Most intervention techniques are considered memories.Declarative long-term memory procedure is different from procedural memory, because it refers to the memory based on the facts, and easily verbalized.