The essential feature of the dissociative disorders is that they involve a disturbance in the integrative functions of identity, memory and/or consciousness. People can dissociate (block from memory) events, emotions and/or bodily sensations. Dissociation can be thought of along a spectrum ranging from normal dissociation, Dissociatve Amnesia (Fugue states), Posttraumatic Stress Disorder (technically classified as an anxiety disorder), atypical dissociative disorders (called Dissociative Disorders Not Otherwsie Specified or DDNOS) and Dissociative Identity Disorder (DID).