The deepest part of the brainb A brain scientist who broke the taboos of academia and studied near-death experiences and mysterious experiences. b When many brain scientists are immersed in the incredible power of the cerebral cortex, one has noticed the brainstem and limbic system at the deepest level of the brain. Kevin Nelson, a world-renowned neurologist who has explored NDEs and spiritual experiences for more than 30 years, is the author of The Deepest Brain. These areas are the oldest and primitive parts of the human brain, where the brainstem is responsible for vital functions such as breathing, heartbeat, and sleep, and the limbic system is where feelings and emotions are created. I write a bold hypothesis that the brains dream function is activated when death approaches, and I try scientific verification through many case studies and brain scan analysis. From the footsteps of the bed to the death-defying experiences of guardian angels and demons, or the experiences of doctors who felt the presence of God while playing pinball games, the science explains the biological action that causes mysterious spiritual experiences. According to the author, spiritual experience has the same instinctive character as human sexual impulses or survival instincts. In this regard, the book will provide new insights into brain activity, from near-death experiences, body departures, liberation, and mysterious unity experiences to ecstatic epilepsy, panic disorder, narcolepsy, sleep disorders, and scissors.