Popularized by contemporary psychiatrist, Dr. Daniel Amen, brain health is described as the physical functioning of the brain that creates the mind, emphasizing that a healthy brain is necessary for a healthy mind. Dr. Amen reports assessing brain health can be achieved through four main areas: 1) biological (physical brain health), 2) psychological (mindset), 3) social (relationships), and 4) spiritual (finding meaning). He also popularized SPECT (Single- photon emission computed tomography), a 3D nuclear medicine technology that utilizes injected radioactive tracers and gamma cameras to discern blood flow and function in tissue including the brain. Through visualizing blood flow and activity, Dr. Amen addressed mental illness as both biological and psychological. (Amen, D. [DrDanielAmen]. (2024). Brain health: The Four Circles approach to mental wellness[Video]. YouTube. https://www.youtube.com/watch?v).