Emotional Abuse as Harmful as Physical Abuse

This CNN article entitled "Belittling Kids As Harmful As Beating, Study Finds," describes research indicating that emotional abuse (e.g., yelling, belittling, terrorizing, neglecting, etc) can be as harmful to a child's development as physical abuse. This is challenging to detect, however, because emotional abuse does not leave the external marks that physical abuse can. How can medical staff and those who work with children detect and intervene in emotional abuse cases? What can be done to prevent it?