This can mean a wide variety of things. Moderate to severe physical special needs can include things like cerebral palsy, seizure disorders, genetic disorders requiring regular care, children who are fed through a gastric feeding tube (g-tube), etc. Moderate to severe cognitive special needs frequently refers to learning disabilities (i.e. dyslexia, information processing disorders, etc.) or cognitive delays, also called mental retardation. The final categories of special needs are emotional and behavioral special needs. Children with these needs may have diagnoses including Post-Traumatic Stress Disorder, Attention Deficit Hyperactivity Disorder, Oppositional Defiant Disorder, Intermittent Explosive Disorder, Bipolar Disorder, and others. These children may have a history of challenging behaviors including violence toward objects, animals, or other people, sexually inappropriate behavior, stealing, tantrums, fire-setting, and others.