Andrew Huberman· PhD
You can get what's called a long-term depression, and that doesn't have anything to do with the depression associated with low mood. What we're talking about is a weakening of connections. You can go from having a very high speed ethernet connection between neurons, so to speak, to a connection that's more like Morse code, or as like a poor dial up connection or really weak signal. And that's what's happening when you extinguish a fear, when you unlearn a fear.