The mechanisms of the action of sex steroid hormones on the nervous system are related to both classical, intracellularly mediated effects and non-classical membrane effects due to binding to membrane receptors. Some steroids are capable of inducing rapid neurotransmitter-like effects, similar to those of dopamine or glutamate that alter the activity of neuronal systems via different types of receptors. The neuroactive steroids are endogenous neuromodulators synthesized in the brain and rapidly affecting neuronal excitability. Sex steroids exert many pleiotropic effects in the nervous system: they modulate main neurotransmitter systems, promote the viability of neurons, play an important role in myelination, and influence cognitive processes. Estradiol protects neurons from excitotoxic damage and increases neuronal survival. Progesterone stimulates neurological and functional recovery. Androgens also exhibit a wide array of neuroprotective effects in motoneurons, including supporting cell survival, axonal regeneration, and dendritic maintenance. Despite the considerable increase of sex hormones and neurosteroids research in recent years and the ongoing discovery of biochemical mechanisms of action, their role in neurodegenerative processes remains not well determined.

The book provides chapters on sex hormones and their modulation in neurodegenerative processes and pathologies, from basic molecular mechanisms, physiology, gender differences, to neuroprotection and clinical aspects for potential novel pharmacotherapy approaches. The book contains 14 chapters written by authors from various biomedical professions, from basic researchers in biology and physiology to medicine and veterinary medicine, pharmacologists, psychiatrist, etc. Chapters sum up the past and current knowledge on sex hormones, representing original new insights into their role in brain functioning, mental disorders and neurodegenerative diseases. The book is written for a broad range of audience, from biomedical students to highly profiled medical specialists and biomedical researchers, helping them to expand their knowledge on sex hormones in neurodegenerative processes and opening new questions for further investigation.

What arouses an animal or human from an inactive, nonresponsive state to a condition of activity and responsiveness? What are the biological mechanisms for this change? In this book Donald W. Pfaff focuses on a reproductive behavior typical of many female animals. Sensory stimuli from the male trigger responses in a well-defined circuit of nerve cells. At the top of the circuit, certain nerve cells receive and retain sex hormones such as estrogens and progesterone. As a result, specific genes in these nerve cells are turned on at specific times, affecting in turn the rest of the neural circuit and causing a state of sexual responsiveness. According to Pfaff, the biological bases for the most primitive human drives are largely explained by mechanisms uncovered in animal brains that have not changed in their fundamental properties over millions of years of evolution. Focusing on a single instinctive behavior, in this case the sex drive, is an important step toward understanding the biological reasons for the change from unmotivated to motivated animal behavior.

It is well known that estrogen is "somehow” a protective hormone for various age-related disorders. This book provides a solid knowledge of estrogen’s neuroprotective activities in the brain with a special emphasis on neurodegenerative disorders such as Alzheimer’s Disease. The focus is (1) to describe the biochemical, molecular, and cellular basis of the protective activity of estrogen and (2) to transfer this knowledge into the hospitals by discussing preventive and therapeutic approaches such as estrogen replacement therapy for post-menopausal women. Besides up-to-date information on estrogen and the brain, this book explains in a highly understandable manner molecular and cellular techniques by which basic data have been collected. The reader, which may include the professional specialist as well as the interested non-specialist, will also gain insight into the scientific transfer process of knowledge from basic science to the clinical situation and therefore "from bench to bed”.

Sex Differences in the Central Nervous System offers a comprehensive examination of the current state of sex differences research, from both the basic science and clinical research perspectives. Given the current NIH directive that funded preclinical research must consider both females and males, this topic is of interest to an increasing percentage of the neuroscience research population. The volume serves as an invaluable resource, offering coverage of a wide range of topics: sex differences in cognition, learning, and memory, sex hormone signaling mechanisms, neuroimmune interactions, epigenetics, social behavior, neurologic disease, psychological disorders, and stress. Discussions of research in both animal models and human patient populations are included. Details how sex hormones have widespread effects on the nervous system and influence the way males and females function Assists readers in determining how sex impacts their research and practice, and assists in determining how to adjust research programs to incorporate sex influences Includes discussions of research in both animal models and human patient populations, and at various developmental stages Features revised and updated chapters by leaders in the field around the globe—the broadest, most expert coverage available

Estrogen and testosterone have an important impact on the operation of certain parts of the brain. This book describes the neurobiological bases for the understanding of the interactions between these sex hormones and the brain. It covers a broad range of topics, extending from the molecular and cellular processes, through the action of steroids on neurotransmission, all the way to defining the brain circuitry involved in both male and female behavior. This volume presents a snapshot of the rapidly advancing field of reproductive neuroendocrinology and will be an important resource for graduate students and professionals in neuroscience and animal behavior.

Breadth (from molecules to ecophysiology), ranging from basic science to clinical research, making this reference of interest to a broad range of scientists in a variety of fields. Key Features * Contributors from 16 different countries and more than 70 institutions * Unlike any other hormone reference on the market Hormones, Brain and Behavior addresses hormone effects in all major vertebrate and non-vertebrate models * A timely, current reference on an emerging field with each chapter providing an in-depth exploration of the topic * Discusses molecular aspects of hormone function, systems, development, and hormone-related diseases * Addresses hormone effects in both the developing and adult nervous system Topics include: * Mammalian and Non-mammalian Hormone-behavior Systems * Cellular and Molecular Mechanisms of Hormone Actions on Behavior * Development of Hormone-dependent Neuronal Systems * Hormone/Behavior Relations of Clinical Importance.