This book presents the state of the art regarding the use of non-invasive brain stimulation (TMS and tDCS) in the research and treatment of neuropsychiatric disorders. The contributions, all of which were prepared by internationally recognized experts in the field, are divided into two main sections (for TMS and tDCS, respectively) across diagnoses, following an introductory section on the mechanisms of action and neurophysiological background. Neuropsychological perspectives and approaches are provided as well. The book is ultimately intended to offer a unique, integrated approach to the use of non-invasive brain stimulation across the clinical neurosciences, providing a comprehensive and updated perspective that will benefit psychiatrists, neurologists, clinical psychologists and neurophysiologists alike.

As understanding evolves about how different brain regions are involved in carrying out everyday tasks -- and in causing brain diseases when they go awry -- this book describes a new technology that allows physicians to focally stimulate the brain in awake adults through a non-invasive procedure. Transcranial Magnetic Stimulation in Clinical Psychiatry is an accessible and authoritative review of TMS, a procedure that is showing promise as a treatment in several disorders. Its authors explain how the procedure works, then the latest findings in a wide range of situations -- notably in depression, but also in other conditions ranging from migraine to stroke recovery. This concise overview of TMS offers practical guidance for psychiatrists and other clinicians using it as a therapy, or referring their patients to have this done, as well as updating the field for neuroscientists and neurologists. It begins with background on the physics and safety of TMS, a guide for administering the procedure, and a review of basic neurophysiological studies with TMS, showing how it can be used to measure connectivity and excitability of the cerebral cortex. The heart of book is then devoted to its clinical applications, organized by disorder: Epilepsy, movement disorders, and pain -- describes the use of TMS in inducing and inhibiting seizures and investigating their pathophysiology; in treating Parkinson's disease; and in relieving pain through motor cortex stimulation Major depression -- provides a critical review of research in the most-studied clinical application of TMS in psychiatry, where it is used as a therapeutic intervention and a neurophysiological probe Mania -- explores the effectiveness of TMS in light of its ECT-like properties through a trial of right TMS vs. sham TMS Anxiety disorders -- reports on investigations on the uses of TMS in treating obsessive-compulsive disorder and posttraumatic stress disorder Schizophrenia -- reviews studies utilizing single- or paired-pulse TMS to assess cortical inhibition and those that explore effects of extended trains of repetitive TMS in altering symptoms A further chapter on TMS in brain imaging shows how integrating imaging and TMS allows one to better place the TMS coil, better understand TMS effects on the brain, and improve understanding of how the brain mediates behavior. With a concluding overview of prospects for the future of repetitive TMS, this volume offers a definitive look at this cutting-edge research and provides critical guidance on how and when clinicians might use TMS in their practice.

The potential efficacy of non-invasive brain stimulation procedures for the management of specific symptoms in diverse neurological and psychiatric conditions has been tested in the past decade or so. For example, repetitive transcranial magnetic stimulation (rTMS) over prefrontal areas has been extensively investigated as a treatment for patients with medication-resistant depression and has been shown to be associated with improvement of mood. Similarly, non-invasive stimulation techniques have been applied to various symptoms of Parkinson's disease such as bradykinesia and dyskinesias, with variables degrees of success reported. However, attempts to expand previously observed clinical improvements to other neurological disorders (e.g. Tourette's syndrome, autism, epilepsy) has been controversial. In trying to bypass potential confounding elements, researchers aim to target neural populations altered in disease to either increase or decrease their corrupted baseline activity. In addition, a complementary approach is to extend stimulation protocols that results enhanced behavior in healthy participants. This Frontiers Research Topic on non-invasive brain stimulation and enhancement of function tries to combine a series of articles from researchers who used non-invasive brain stimulation to aim improvement of either a motoric, cognitive or behavioral nature investigated behaviorally, physiologically or using brain imaging techniques in clinical populations. Investigation of the relation between enhancement of function in healthy populations and clinical improvement in patients with neurological or psychiatric disorders needs further consideration.

The aim of this book is to provide a comprehensive review of the use of Transcranial Direct Current Stimulation (tDCS) in different psychiatric conditions. Here we review tDCS clinical studies employing different types of design (from single-session tDCS studies to randomized clinical trials) as well as studies evaluating the impact of tDCS in neurophysiological, behavioral and brain imaging outcomes. Although the understanding about physiological foundations and effectiveness of clinical therapies of psychiatric diseases has been considerably increased during the last decades, our knowledge is still limited, and consequently psychiatric diseases are still a major burden to the individual patient and society. Recently, interest in pathological alterations of neuroplasticity in psychiatric diseases as a critical condition for development, and amelioration of clinical symptoms increased, caused by the fact that new tools, such as functional imaging, and brain stimulation techniques do allow to monitor, and modulate these phenomena in humans. Especially non-invasive brain stimulation techniques evolved as an attractive potential new therapeutic tool. The interest in non-invasive brain stimulation has grown exponentially in the past 25 years, with the development of non-pharmacological, neuromodulatory techniques such as tDCS and repetitive transcranial magnetic stimulation (rTMS). TDCS, although even newer than rTMS, has attracted considerable attention in both basic and clinical research scenarios. In the context of clinical research, tDCS is being increasingly investigated as a novel treatment tool for several psychiatric disorders, such as major depression, schizophrenia and neurocognitive and substance abuse disorders. Transcranial Direct Current Stimulation in Neuropsychiatric Disorders – Clinical Principles and Management intends to serve as a practical guide on the field, attracting the interest of psychiatrists, neurologists and neuroscientists with little or no experience with tDCS, as well as those with a background on tDCS who want to increase their knowledge in any particular psychiatric condition.

Brain stimulation techniques, transcranial magnetic stimulation (TMS) and transcranial direct current stimulation (TDCS), modify brain function through interaction with multiple neurotransmitters and networks. The implementation of these non-invasive stimulation techniques in physiology, behavioral studies, with modelling or functional imaging has provided an outstanding causal link between brain structure and function and helped identify neural networks mediating cognitive or motor function. The potential efficacy of non-invasive brain stimulation procedures for the management of specific symptoms in diverse neurological and psychiatric conditions has been tested in the past decade or so. For example, repetitive TMS over prefrontal areas has been extensively investigated as a treatment for patients with medication-resistant depression and has been shown to be associated with improvement of mood. Similarly, non-invasive stimulation techniques have been applied to various symptoms of Parkinson's disease such as bradykinesia and dyskinesias, with variables degrees of success reported. However, attempts to expand previously observed clinical improvements to other neurological disorders (e.g. Tourette's syndrome, autism, epilepsy) has been controversial. In trying to bypass potential confounding elements, researchers aim to target neural populations altered in disease to either increase or decrease their corrupted baseline activity. In addition, a complementary approach is to extend stimulation protocols that results enhanced behavior in healthy participants. One of the potential limitation of this latter strategy has been that most of the protocols evaluated in healthy participants have been tested in populations that are not comparable to the patient populations. This Frontiers Research Topic on non-invasive brain stimulation and enhancement of function seeks to combine contributions from researchers who found non-invasive brain stimulation induced improvement of either a motoric, cognitive or behavioral nature investigated behaviorally, physiologically or using brain imaging techniques in clinical populations. Investigation of the relation between enhancement of function in healthy populations and improvement of symptoms in patients with neurological or psychiatric disorders needs further consideration. Critically, the topic will be centered on the following topics to expand current knowledge: • selection of adequate stimulation protocols, including simple questions such as whether TMS or TDCS is more efficacious for inducing enhancement of function in brain disease; • methodological issues such as optimizing cortical targets and the use of good control groups; • which symptoms to tackle in different brain disorders. For example, is it possible to de-activate hyperactive cortical regions present in Parkinson disease to induce clinical amelioration? Do protocols used in healthy populations produce similar predictable effects in parkinsonian persons?; • potential of using stimulation protocols in combination with pharmacological or cognitive therapy; • the use of appropriate clinical, behavioral, physiological and imaging tools to measure brain plastic changes. Consideration about possible multi-centre clinical trials: feasibility, problems and authorization pathways. Studies or reviews on cost-effectiveness. The aim of this topic is to determine which disease signs are treatable with non-invasive brain stimulation and available protocols to interfere with altered brain systems and produce enhanced motor and behavior outcomes. This Frontiers Research Topic will be important in identifying new avenues of clinical research for rapid advances in the field.