Inside the Mind: How fMRI Brain Scans Reveal Thoughts
Functional Magnetic Resonance Imaging, or fMRI, is an incredible technology that lets scientists observe the brain in action. fMRI enables us to see which parts of the brain are active during different thoughts, emotions, or actions. It has revolutionized our understanding of the mind and is used widely in research and medicine. Renowned figures like Alan Alda and Dr. Nancy Kanwisher at MIT have contributed to public awareness and understanding of fMRI. Alan Alda, through his science communication efforts, and Dr. Kanwisher, an MIT neuroscientist, have helped explain how fMRI opens windows into the brain’s complexities. How Does fMRI Scanning Work? At its core, fMRI measures brain activity by detecting changes in blood flow. The basic idea is simple: when a part of the brain is in use, it requires more oxygen. Blood rich in oxygen flows to active areas, and fMRI detects these changes using a method called BOLD (Blood Oxygen Level Dependent) contrast. An fMRI scan typically involve...