Raw emotion (unresolved emotions conjured up for acting) may result in a sleep deprivation and the cyclical nature of the ensuing side effects. Sleep deprivation alone can lead to impaired function, causing some individuals to have "acute episodes of psychosis". Sleep deprivation initiates chemical changes in the brain that can lead to behavior similar to psychotic individuals. These episodes can lead to more lasting psychological damage. In cases where raw emotion that has not been resolved, or traumas have been evoked before closure has been reached by the individual, the emotion can result in greater emotional instability and increased sense of anxiety, fear or shame.