In this book, the authors present topical research in the study of the classification, evolution and behaviour of primates. Topics discussed in this compilation include the analysis of the attachments, relative weights, and innervation of the lower limb muscles of various apes and modern humans; Alzheimer pathology in non-human primates and its pathophysiological implications; the evolutionary transformations and adaptations related to the different locomotor modes developed by hylobatids, orang-utans, gorillas, chimpanzees and modern humans; neurobiological correlates of behavioural and cognitive performance in non-human primates; and assessing the cognitive capacities of various non-human primate species.