Neurotheology, the study of the brain's relationship with religious and spiritual phenomena, can serve as a bridge between understanding how spirituality and religion affect brain function and how this relates to mental health changes. Research shows that religious and spiritual beliefs, practices, and experiences can profoundly impact the psyche, often positively by lowering depression, anxiety, and distress, but sometimes negatively by fostering harmful beliefs or behaviors. This field examines both positive and negative effects from a brain perspective and offers philosophical insights into the mind and perception of reality. The review evaluates these topics and considers practical applications for integrative psychiatry.
Advanced neuroimaging studies have examined consciousness across normal waking, sleep, anesthesia, and disorders like seizures or schizophrenia, as well as altered states induced by meditation or psychoactive substances. This review discusses relevant research and highlights limitations and challenges in studying consciousness with PET, SPECT, and advanced MRI modalities.