This may explain why [sleep paralysis] comes in waves or bouts, episodes might coincide with a period of stress.

Daniel Denis

Categorized in : Health

We know the amygdala is highly active in REM, which is important to fear and emotionalmemory, you have part of the brain actively responding to fear or something emotional, but nothing in the environment to account for that. So the brain comes up with a solution to that paradox.