Ah, resting state functional connectivity. Still not sure I believe most of the broad-stroke conclusions, but an interesting area. For those unfamiliar, a heal

Ah, resting state functional connectivity. Still not sure I believe most of the broad-stroke conclusions, but an interesting area. For those unfamiliar, a healthy brain has what is called neurovascular coupling where the amount of blood flow into local clusters of neurons (order of millimeters) is adjusted based on demand (order of seconds). Simple optimization strategy. With MRI T2* imaging we are able to measure blood flow because the ratio of oxy-/deoxy-hemoglobin subtly alters the magnetic field. So if you take a picture of the brain every 2 seconds you get "blood flow" and if the average signal in 2 areas have a similar shape, we say they are "functionally connected." Just good to keep in mind because it's an area of research particularly prone to misunderstanding.