Procedural memory is the most basic and primitive form of memory. As the name implies, this is the type of memory we have for "procedures" or for basic associations between stimuli and responses. For example, the process or procedure for riding a bike. Once you've learned this procedure (ie, made the association between the stimulus and appropriate responses) it is stored as a procedural memory. You've learned to respond with the appropriate set of behaviors and adapted properly to your environment.