The exact neurochemistry behind why you wake up completely paralyzed, and why it feels like a demon is sitting on your chest. 👇
• When you enter REM (Rapid Eye Movement) sleep, your motor cortex is highly active. Your brain is firing intense signals telling your body to run, fight or jump based on whatever you are dreaming about.
• If your body actually acted out those dreams, you would severely injure yourself in bed. So, to protect you, your brainstem (specifically the pons) flips a chemical kill-switch. It floods your spinal cord with inhibitory neurotransmitters, specifically GABA and Glycine.
• These chemicals temporarily paralyze almost all of your voluntary motor neurons. Your brain is vividly dreaming, but your physical body is on absolute lockdown in a state called REM atonia.
• Usually, this kill-switch turns off before your conscious mind wakes up. But sometimes, there is a physiological lag. Your conscious mind wakes up, but your brainstem forgets to shut off the chemical drip. You are wide awake, but your body is still completely paralyzed.
• Because you suddenly realize you can't move, your amygdala triggers an instant panic attack. That classic crushing weight on your chest happens because you are trying to take deep, panicked breaths, but your chest wall muscles are still chemically paralyzed. Only your diaphragm is working.
• To make matters worse, your brain is still hovering half-in and half-out of REM sleep. It takes your absolute terror and literally projects your nightmare into the physical room around you as a hallucination.
So no, you aren't having a stroke. FOLLOW ME for clinical breakdowns!