What is this weird feeling?

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In psychology, the term dissociation describes a wide array of experiences from mild detachment from immediate surroundings to more severe detachment from physical and emotional experience. The major characteristic of all dissociative phenomena involves a detachment from reality, rather than a loss of reality as in psychosis.[1][2][3][4] Dissociative experiences are further characterized by the varied maladaptive mental constructions of an individual's natural imaginative capacity.[citation needed]

Dissociation is commonly displayed on a continuum.[5] In mild cases, dissociation can be regarded as a coping mechanism or defense mechanisms in seeking to master, minimize or tolerate stress ? including boredom or conflict.[6][7][8] At the nonpathological end of the continuum, dissociation describes common events such as daydreaming while driving a vehicle. Further along the continuum are non-pathological altered states of consciousness.[5][9][10]

More pathological dissociation involves dissociative disorders, including dissociative fugue and depersonalization disorder with or without alterations in personal identity or sense of self. These alterations can include: a sense that self or the world is unreal (depersonalization and derealization); a loss of memory (amnesia); forgetting identity or assuming a new self (fugue); and fragmentation of identity or self into separate streams of consciousness (dissociative identity disorder, formerly termed multiple personality disorder) and complex post-traumatic stress disorder.[11][12]

Dissociative disorders are sometimes triggered by trauma, but may be preceded only by stress, psychoactive substances, or no identifiable trigger at all.[13] The ICD-10 classifies conversion disorder as a dissociative disorder.[5] The Diagnostic and Statistical Manual of Mental Disorders groups all dissociative disorders into a single category.[14]

Although some dissociative disruptions involve amnesia, other dissociative events do not.[15] Dissociative disorders are typically experienced as startling, autonomous intrusions into the person's usual ways of responding or functioning. Due to their unexpected and largely inexplicable nature, they tend to be quite unsettling.