Your brain network is always on

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A note for Lesson no. 2, "Your Brain Is a Network," in Seven and a Half Lessons About the Brain by Lisa Feldman Barrett.
Some context from page 33 is:

Your brain network is always on.

The neurons in your brain are always firing. This is called intrinsic activity. Incoming sense data from the body and from the world merely modulates this ongoing neural activity. For useful references, see Raichle (2010,2015).[1][2]


  1. Raichle, Marcus E. 2010. "Two Views of Brain Function." Trends in Cognitive Science 14: 180–190.
  2. Raichle, Marcus E. 2015. "The Restless Brain: How Intrinsic Activity Organizes Brain Function." Philosophical Transactions of the Royal Society B 370 (1668): 20140172.