Reactive attachment disorder (RAD) occurs when infants do not form healthy emotional attachments with their primary caregivers due to neglect of their emotional and physical needs. Children with RAD experience serious social and emotional neglect early in life which disrupts typical attachment development. Symptoms include being detached, uncaring, defiant, and lacking emotions besides anger. Treatment involves strengthening the relationship between the child and caregiver through therapy. RAD that goes untreated can persist into adulthood as personality disorders due to the brain injury caused by early abuse and neglect.