member or close associate. Trauma symptoms may come in the form of intrusive memories, dreams, or flashbacks; avoidance of reminders of the traumatic event; negative thoughts and feelings; or increased alertness or reactivity. Memories associated with trauma are typically explicit, coherent, and difficult to forget. Due to the complexity of the interaction between traumatic event occurrence and trauma symptomatology, a person's distress response to aversive details of a traumatic event may involve intense fear or helplessness but ranges according to the context. In children, trauma symptoms can be manifested in the form of disorganized or agitative behaviors. Trauma can be caused by a wide variety of events, but there are a few common aspects. There is frequently a violation of the person's core assumptions about the world and their human rights, putting the person in a state of extreme confusion and insecurity. This is seen when institutions depended upon for survival violate, humiliate, betray, or cause major losses or separations instead of evoking aspects like positive self worth, safe boundaries and personal freedom. Psychologically traumatic experiences often involve physical trauma that threatens one's survival and sense of security. Typical causes and dangers of psychological trauma include harassment, embarrassment, abandonment, abusive relationships, rejection, co-dependence, physical assault, sexual abuse, partner battery, employment discrimination, police brutality, judicial corruption and misconduct, bullying, paternalism, domestic violence, indoctrination, being the victim of an alcoholic parent, the threat or the witnessing of violence (particularly in childhood), life-threatening medical conditions, and medication-induced trauma. Catastrophic natural disasters such as earthquakes and volcanic eruptions, large scale transportation accidents, house or domestic fire, motor vehicle accident, mass interpersonal violence like war, terrorist attacks or other mass victimization like sex trafficking, being taken as a hostage or being kidnapped can also cause psychological trauma. Long-term exposure to situations such as extreme poverty or other forms of abuse, such as verbal abuse, exist independently of physical trauma but still generate psychological trauma. Some theories suggest childhood trauma can increase one's risk for mental disorders including post-traumatic stress disorder (PTSD), depression, and substance abuse. Childhood adversity is associated with neuroticism during adulthood. Parts of the brain in a growing child are developing in a sequential and hierarchical order, from least complex to most complex. The brain's neurons change in response to the constant external signals and stimulation, receiving and storing new information. This allows the brain to continually respond to its surroundings and promote