Depersonalization/derealization disorder

Depersonalization/derealization disorder is a mental health condition that affects the brain's perception of self and surroundings. People with this disorder often feel detached from their own body or thoughts, described as feeling like an outside observer of themselves, which is called depersonalization. They may also experience derealization, where the world around them seems unreal or distorted. This condition primarily involves the nervous system, particularly brain areas responsible for processing sensory information and emotional responses. It can cause significant distress and interfere with daily functioning, making it hard to feel connected to reality or to one's own identity. The symptoms are persistent or recurrent and are not caused by substance use or other medical conditions.

Depersonalization/derealization disorder is characterized by persistent or recurrent episodes of depersonalization (a sense of detachment from one’s self) and/or derealization (experiencing the external world as unreal). It is classified as a dissociative disorder involving disruption in the normal integration of consciousness, identity, and perception. The underlying mechanism is thought to involve abnormal functioning of brain regions such as the prefrontal cortex and limbic system, leading to altered sensory processing and emotional regulation. This disorder is often triggered by severe stress, trauma, or anxiety but can occur independently. It is clinically significant because it causes marked distress or impairment in social, occupational, or other important areas of functioning. Unlike psychotic disorders, reality testing remains intact, meaning patients recognize their experiences as subjective and not actual loss of reality.