such as employment, can provide significant physical and mental value to people's lives. And how breaking the disability mindset around people experiencing psychosis is imperative for their overall, long-term health and wellbeing as well as the contributions they are able to make to their immediate social connections and the wider community. Causes The symptoms of psychosis may be caused by serious psychiatric disorders such as schizophrenia, a number of medical illnesses, and trauma. Psychosis may also be temporary or transient, and be caused by medications or substance use disorder (substance-induced psychosis). Normal states Brief hallucinations are not uncommon in those without any psychiatric disease, including healthy children. Causes or triggers include: Falling asleep and waking: hypnagogic and hypnopompic hallucinations Bereavement, in which hallucinations of a deceased loved one are common Severe sleep deprivation Extreme stress (see below) Trauma and stress Traumatic life events have been linked with an elevated risk of developing psychotic symptoms. Childhood trauma has specifically been shown to be a predictor of adolescent and adult psychosis. Individuals with psychotic symptoms are three times more likely to have experienced childhood trauma (e.g., physical or sexual abuse, physical or emotional neglect) than those in the general population. Increased individual vulnerability toward psychosis may interact with traumatic experiences promoting an onset of future psychotic symptoms, particularly during sensitive developmental periods. Importantly, the relationship between traumatic life events and psychotic symptoms appears to be dose-dependent in which multiple traumatic life events accumulate, compounding symptom expression and severity. However, acute, stressful events can also trigger brief psychotic episodes. Trauma prevention and early intervention may be an important target for decreasing the incidence of psychotic disorders and ameliorating its effects.A healthy person could become psychotic if he is placed in an empty room with no light and sound after 15 minutes, a phenomenon known as sensory deprivation. Neuroticism, a personality trait associated with vulnerability to stressors, is an independent predictor of the development of psychosis. Psychiatric disorders From a diagnostic standpoint, organic disorders were believed to be caused by physical illness affecting the brain (that is, psychiatric disorders secondary to other conditions) while functional disorders were considered disorders of the functioning of the mind in the absence of physical disorders (that is, primary psychological or psychiatric disorders). Subtle physical abnormalities have been found in illnesses traditionally considered functional, such as schizophrenia. The DSM-IV-TR avoids the functional/organic distinction, and instead lists traditional psychotic illnesses,