Neurodevelopmental disorders begin in the developmental period of childhood. And may continue through adulthood. They may range from the very specific to a general or global impairment. And often co-occur (APA, 2013). They include specific learning and language disorders, attention deficit hyperactivity disorder (ADHD), autism spectrum disorders, and intellectual disabilities. Neurocognitive disorders, on the other hand, represent a decline in one or more areas of prior mental function that is significant enough to impact independent functioning. They may occur at any time in life and be caused by factors such brain injury; diseases such as Alzheimer’s, Parkinson’s, or Huntington’s; infection; or stroke, among others.