The Main Biological Functions and the Endocrinological Mechanisms of Behavior

In this chapter, we present the influence of hormones, pain, and other major biological functions on behavior. In particular, many links between endocrine systems and neurophysiology are highlighted through the description of the major organic functions. In detail, ► Sect. 3.1 describes the endocrinological functions and their behavioral influences; ► Sect. 3.2 describes the major organic functions common to all mammals, with emphasis on their expression in the canine species; and ► Sect. 3.3 deals with pain and its consequences. In clinical practice, while the veterinary psychiatrist focuses more on brain functions to establish a diagnosis, the study of these major functions remains essential to maintain a comprehensive approach to canine behavior.