Multidisciplinary research on the biological basis of our behavior is of great interest in our country as well as all over the world. This book, which is an original work in the field of physiological psychology, has been prepared by experts in the field of psychology, neurosciences, physiology, anatomy, neurology, psychiatry, language and speech therapy departments of different universities. the book covers genetics, neural transmission, nervous system, brain development, psychopharmacology, visual and non-visual sensory systems, motor system, language, memory, learning, emotions, social cognition, eating-drinking-reproductive behaviors and sleep. In these chapters, firstly, the historical development of the subject is discussed, then the biological mechanisms underlying the behaviors are explained and the subjects are enriched through current studies. in the physiological psychology book, which includes the topics at the intersection of physiology, anatomy and psychology, it has been taken care to include not only western-based studies but also original studies made in our country. attention was paid to the fact that the narrative language of the book was fluent, plain and understandable, and the topics were supported by diagrams, pictures and graphics, and priority was given to preparing the sections in a way that the reader could read with pleasure and easily understand. We hope this book will be a resource for professionals and students working in the fields of psychology, counseling and guidance, psychiatry and neuroscience to help them discover the biological basis of behavior. more than 50 stocks are available for sale at the campaign price. price listed is valid until October 16, 2026. This publication is ideal for readers seeking insightful and educational content. Prepared by experienced authors and printed with high-quality materials. Great for students, educators, and curious minds.