This book introduces the workings of the central nervous system to biomedical science and veterinary students. It provides structural and functional insight into how the system might fail and how damaged components can be recognized. The discussions are based on a generalized mammal, with specific references to humans and domestic animals. The author emphasizes an economical approach, one that enables beginners to grasp essential principles quickly and easily. More advanced passages, appropriate for research students and clinicians, are distinguished by a separate typeface.