Chapter 2 in "Latest Findings in Intellectual and Developmental Disabilities Research" Edited by Üner Tan, ISBN 978-953-307-865-6, 404 pages, Publisher: InTech, Chapters published February 15, 2012 under CC BY 3.0 license | Intellectual and Developmental Disabilities presents reports on a wide range of areas in the field of neurological and intellectual disability, including habitual human quadrupedal locomotion with associated cognitive disabilities, Fragile X syndrome, autism spectrum disorders, Down syndrome, and intellectual developmental disability among children in an African setting. Studies are presented from researchers around the world, looking at aspects as wide-ranging as the genetics behind the conditions to new and innovative therapeutic approaches. (All chapters available online: https://www.intechopen.com/books/latest-findings-in-intellectual-and-developmental-disabilities-research)