Mismatch negativity (MMN) is the brain response to violations of a rule. The MMN peaks at about 100–250 ms after change onset. If MMN occurs so early, before conscious perception, why is surprise considered a cognitive phenomenon? Isn't If MMN occurs so early, before conscious perception, why is surprise considered a cognitive phenomenon? Isn't it rather connected with autonomic processes that take place earlier than cognitive process. Surprise is considered as belonging to cognitive processes. Among emotion theories, the appraisal theory of emotions, considers that there can be no emotion unless I consciously 'label' it. Here I wonder - how can there be any conscious 'labeling' of surprise when MMN shows that surprise takes place earlier than conscious states.how can there be any conscious 'labeling' of surprise when MMN shows that surprise takes place earlier than conscious states? If we accept that surprise does not need conscious awareness for taking place then the appraisal theories that connect surprise with unexpected events are mistaken. See Ortony, Reisenzein and many other appraisal theorists on surprise.