Other contributions to this volume will focus on the extended amygdala and prefrontal cortex, and thus, we will not cover these aspects of C-BG-C circuits except where needed to make key points about their role in the overall circuitry. Instead, our focus will be on the three predominant forebrain circuits known as the associative, limbic (aka cognitive) and sensorimotor (aka motor) C-BG-C circuits, and the interactions among these circuits (Haber 2003).
