“…These issues are compounded by the fact that increased aggressiveness is often observed in patients who suffer from bipolar disorder, major depressive disorder, and antisocial personality disorders (Posternak and Zimmerman, 2002;Swann et al, 2004). Aggressive behaviors are also quite common among abusers of methamphetamine (METH, speed) (Carey and Mandel, 1968;Ellinwood, 1971;Hawks et al, 1969;Miczek and Tidey, 1989;Szuster, 1990). As aggressive behaviors and social interactions can also be influenced by METH in rodents, cats, and non-human primates (Crowley, 1972;Maeda et al, 1985;Miczek and O'Donnell, 1978;Shintomi, 1975;Sokolov et al, 2004), understanding of neuronal adaptations that might be associated with METH-induced aggressiveness in animals should provide a window toward identifying some of the neurobiological substrates that subsume these behaviors.…”