QUOTE : Children are especially dependent on their parents and caregivers to provide the stability and unconditional love that will help them establish a core of resiliency and a sense of self-efficacy to draw upon when faced with adversity later in life. Childhood events that can lead to PTSD and serious difficulties in regulating emotions, and are often linked in research to cutting, certainly include the most abject forms of abuse—physical, sexual, and emotional. But a child's emotional response system—which is controlled by the still developing brain, the sympathetic nervous system, and stress hormones—can be thrown off-kilter by a wide range of painful experiences, whether they are the result of intentionally abusive acts or purely accidental circumstances. Confusing and overwhelming feelings experienced as a result of adoption or abandonment, natural disasters (such as hurricanes or earthquakes,) deaths in the family, serious illness or disability, or witnessing or being the victim of an accident or violent crime can result in symptoms of posttraumatic stress. These kinds of taxing and traumatic events, as well as other societal stressors—from school bullying to identity struggles to perfectionism to body-image issues and the eating disorders often associated with them—have been linked to cutting in various populations.