Sex Differences In Brain Function And Dysfunction

Does sex matter when it comes to brain function? This volume attempts to answer this very important question which is of relevance to the disciplines of psychology, neuroscience, psychiatry and neurology. Understanding how brain function and resultant behaviors may differ between the sexes impacts upon our knowledge of the pathology and development of treatments for various neurological and psychiatric disorders, particularly those that show significant sex differences in either prevalence and/or manifestation of symptoms. This volume covers three main themes of research into sex differences in basic neurobiology, psychology, preclinical research and clinical research. It begins by exploring our understanding of sex and gender in relation to both animal and human behaviors and discusses the relevance, and importance, of considering sex and gender when conducting research into brain function and behaviors. The second theme focuses on how sex and gender influence mental health and considers the impact of our immune system and the changes that occur with ageing. Finally, the third aspect focuses on examples of neurological disorder which show sex differences in terms of their aetiology and/or symptomology and considers the relevance in the development of treatment for these disorders including dementia, stroke and multiple sclerosis. This volume is of considerable interest to mental health and neurology professionals, including psychiatrists, neurologists, nurses, allied health clinicians and pharmacists. It is also helpful and important for preclinical researchers working in neuroscience, psychopharmacology and reproductive endocrinology.

This volume of Progress in Brain Research documents recent developments and research findings in relation to sex and how the brain’s function and behavior differs from men to women. Specific areas include cerebral function, morphology and organization, sexual dimorphism, neural origins,and genetics and epigenetics, as well as potential causes/affects of stress, pain, sexual orientation and identity and other social issues such as distribution of disorders across the sexes and autism. * Informs and updates on all the latest developments in the field * Highlights areas for future research * Contributions from leading authorities and industry experts

This research topic aims to integrate scattered findings on sex differences in neuroscience into a broader theory of how the human brain is shaped by sex and sex hormones in order to cause the great variety of sex differences that are commonly observed. It can be assumed that these differences didn’t occur arbitrarily, but that they rather determined and still determine evolutionary success of individuals and were shaped by the processes of natural and in particular sexual selection. Therefore, sex differences are not negligible and sex difference research cannot be discriminating against one sex or the other. In fact a better understanding of the underlying causes of sex differences has great advantages for both men and women and society as a whole, not only in terms of health care, but in every aspect of life. Gender equality can only work out if it is equally well understood for men and women what their individual resources and needs are. Therefore, it is of great importance to pave the way for identifying the underlying principles of structural and functional brain organization that cause men and women to act, think and feel differently. To this end it is of particular interest to identify possible similarities and interrelations between sex differences that did so far stand separately, in order to investigate whether they share a common source. To understand, where a specific sex difference comes from and whether or not it is caused by the same principle as other sex differences, it is necessary to explicitly link sex differences in behavior to their neuronal correlates and vice versa link sex differences in brain structure and function to their behavioral outcomes. In particular a new understanding of male and female brain functioning may arise from findings on how sex hormones interact with various neurotransmitter systems. In the past few years several findings demonstrated that women’s behavior is influenced by the sex hormone fluctuations they experience naturally during their menstrual cycle to the extent that sex differences may only be detectable in one cycle phase but not another. The study of menstrual cycle dependent effects gives important hints about which sex differences are activational and which are organizational. Additionally it only recently came to attention, that hormonal contraception may alter a women’s mood, cognition and behavior as a consequence of changes in brain structure and function. The underlying mechanisms are so poorly understood that it is even hard to predict, whether hormonal contraception will mask or amplify sex differences in a given task. Since the oral hormonal contraceptive pill is meanwhile used by 100 million women worldwide and even by teenagers whose brains are not yet fully developed, the question of how the synthetic steroids contained in hormonal contraceptives act on the brain is to be studied hand in hand with naturally occurring sex differences. This topic summarizes the current state of the art in sex difference research and gives new perspectives in terms of hypothesis generation an methodology. Both are necessary to gain a complete picture of what it is that makes a brain male or female and move towards a neuroscience of sex differences.

Sex is a fundamentally important biological variable. Recent years have seen significant progress in the integration of sex in many aspects of basic and clinical research, including analyses of sex differences in brain function. Significant advances in the technology available for studying the endocrine and nervous systems are now coupled with a more sophisticated awareness of the interconnections of these two communication systems of the body. A thorough understanding of the current knowledge, conceptual approaches, methodological capabilities, and challenges is a prerequisite to continued progress in research and therapeutics in this interdisciplinary area.Sex Differences in the Brain provides scientists with the basic tools for investigating sex differences in brain and behavior and insight into areas where important progress in understanding physiologically relevant sex differences has already been made. This book was edited and co-authored by members of the Isis Fund Network on Sex, Gender, Drugs and the Brain, sponsored by the Society for Womens Health Research.The book is arranged in three parts. The first part of the book introduces the study of sex differences in the brain, with an overview of how the brain, stress systems, and pharmacogenetics differ in males and females and how this information is important for the study of behavior and neurobiology of both genders. The second part presents examples of sex differences in neurobiology and behavior from both basic and clinical research perspectives, covering both humans and nonhuman animals. The final part discusses sex differences in the neurobiology of disease and neurological disorders.For interested individuals as well as those who are considering conducting research at the intersections of endocrinology, neuroscience, and other areas of biomedicine, the study of sex differences offers exciting and challenging questions and perspectives. This book is intended as a guide and resource for clinicians, scientists, and students.

Accumulating evidence gathered over the past three decades has demonstrated a biological basis for differences between men and women with respect to clinical features and treatment responses to several neuropsychiatric, neurodevelopmental, and neurodegenerative disorders. Dramatic sex differences have also been identified in the brain transcriptomes of individuals with multiple brain disorders, including depression, posttraumatic stress disorder, and autism. The brain transcriptome includes all of the messenger RNA as well as the non-protein-coding RNA molecules expressed in brain tissue and thus represents gene activity. To explore these sex-based transcriptomic differences further, the National Academies of Sciences, Engineering, and Medicine's Forum on Neuroscience and Nervous System Disorders hosted a workshop on September 23, 2020, titled Sex Differences in Brain Disorders: Emerging Transcriptomic Evidence and Implications for Therapeutic Development. The workshop brought together a broad spectrum of stakeholders to share cutting-edge emerging evidence, discuss challenges, and identify future opportunities and potential directions. This publication summarizes the presentation and discussion of the workshop.