Daily Archives: February 18, 2010

‘Fight or Flight’ Might be Ancient

One way to think about front-loading is that a lot of the “heavy-lifting” was done very early in evolution, such that it is all “down hill” from there.  Well, it looks like the basic logic of the autonomic nervous system, which allows organisms to shift between a non-stressed state and a state needed to respond to threats (adrenalin) was in place very early in evolution:

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