This book provides an in-depth exploration of how generative AI is transforming the diagnosis, treatment planning, and future of cognitive healthcare. By integrating cutting-edge artificial intelligence with medical science, it highlights how AI-driven innovations are enhancing early detection, intervention strategies, and personalized treatment for neurological disorders such as Alzheimer’s, Parkinson’s, and dementia. Cognitive diseases pose significant challenges due to late-stage diagnoses, limited treatment efficacy, and the complexity of neurological disorders. This book addresses these critical issues by showcasing the role of AI-generated medical imaging, synthetic data, and biomarker discovery in improving diagnostic accuracy and advancing research. It introduces AI-powered digital twins, neuro rehabilitation, and cognitive therapy, demonstrating how machine learning models can predict disease progression and optimize patient care. Readers will gain insights into how AI is reshaping healthcare workflows, from GANs, VAEs, and diffusion models in medical imaging to AI-assisted patient monitoring and rehabilitation programs. Ethical considerations, such as bias in AI models, patient privacy, and regulatory frameworks, are also discussed, ensuring a balanced perspective on AI adoption in healthcare. Designed for an interdisciplinary audience, this book serves as both an academic reference and a practical guide for medical professionals, AI researchers, healthcare innovators, and policymakers. Whether you are a clinician looking to integrate AI into your practice, a researcher exploring AI applications in medicine, or a technology leader shaping the future of healthcare, this book equips you with the knowledge to harness generative AI for improved cognitive disease management.