Automatism in Dissociative Disorders

​Dissociation involves a psychological detachment from one’s thoughts, feelings, memories, or the surrounding environment. It can be triggered by stress, trauma, or certain psychiatric conditions. During dissociative states, people may feel separated from reality, themselves, or their actions. Automatism refers to actions or behaviours performed without conscious thought or intention. These are automatic, habitual, or reflexive responses. In psychology, automatism can describe behaviours ranging from simple routines (walking, driving, typing) done without focused attention, to more complex dissociative phenomena such as fugue or trance states where the individual acts purposefully but without self-awareness or later memory of those actions.
 
During dissociative states, individuals may act without being consciously aware of their actions, engaging in behaviours that are “automatic” or situation-bound, such as wandering or performing well-learned activities while the conscious mind is detached from the experience. A different personality state may be acting out but later having no memory of their actions. Although their behaviour seems purposeful, it is not under the conscious control of their primary identity. Dissociation is often linked to automatism in the sense that overlearned or habitual behaviours (e.g., driving a familiar route) may occur automatically when a person is dissociating and not paying attention to their immediate environment. Dissociation can cause disturbances in both awareness and volition, with actions being performed automatically, sometimes resulting in the person not remembering these actions later which is a core element in dissociative disorders such as dissociative fugue and some types of amnesia. A person may suddenly travel or wander in a seemingly deliberate fashion, but with no recollection of these actions upon return to their usual state.
 
Automatism and dissociation are important in understanding certain psychiatric conditions, especially dissociative identity disorder, psychogenic fugue states, and PTSD, where “automatic” behaviours may manifest under high stress or trauma. From a legal and clinical standpoint, automatism in dissociative disorders is important because individuals may engage in complex activities, sometimes even criminal behaviours, without conscious awareness, raising questions of responsibility and intent. Distinguishing automatism related to dissociative disorders from other causes (e.g., epilepsy, substance use) requires careful clinical investigation.
 
Dissociation creates a gap in conscious awareness, and automatism fills it with habitual or reflex actions. This interplay is central to the mechanisms behind certain psychological disorders, particularly those involving disturbances of consciousness, volition, and memory; it often leaves the individual with memory gaps and a sense of alienation from their own actions.
 
References
 
McCaldon, R.J. (1964, October 24; 91(17): 914-920). Automatism. Canadaian Medical Association.
 
McLeod, H.J., Byrne, M.K. & Aitken, R. (2004, August 12; 27(5): 471-487). Automatism and Dissociation: Disturbances of Consciousness and Volition from a Psychological Perspective. International Journal of Law and Psychiatry.
 
Ricci, V., Ciavarella, M.C., Marrangone, C., Messas, G., Maina, G. & Martinotti, G. (2025, March 20; 16: 1543673). Modern Perspectives on Psychoses: Dissociation, Automatism, and Temporality Across Exogenous and Endogenous Dimensions.Frontiers in Psychiatry.