S02E01 Bonus : Sleep Paralysis | TBC - Truly BioChemical

Step back into the dark side of REM sleep in this bonus episode of *Truly BioChemical*. We explore the terrifying sensory hallucinations that accompany this glitch in consciousness, from auditory rushing and phantom footsteps to olfactory decay and the crushing weight of the "incubus". **What we cover this week:** - **The Hallucination Spectrum:** We break down the visual, auditory, and olfactory terrors of sleep paralysis, including the vivid sensation of air rushing through the head, the smell of decay, and out-of-body vestibular-motor hallucinations. - **Sleepwalking vs. Paralysis:** We explain why sleepwalking safely occurs during non-REM sleep, allowing the physical body to move without the brain experiencing vivid, directed dreams. - **The Ion Pump Mechanism:** We dive into the electrochemical mechanics of muscle paralysis, examining how the cellular potassium-sodium pump establishes a negative resting potential by pushing three sodium ions out for every two potassium ions brought in. - **The Neurotransmitter Cascade:** We trace the biochemical signaling pathway from acetylcholine in the pons, to glutamate, to the ultimate release of GABA and glycine by the medulla. - **Hyperpolarizing Motor Neurons:** We theorize how GABA and glycine alter cell membrane permeability—potentially by opening potassium channels to let positive charge escape—driving the internal charge lower to completely block skeletal motor neuron firing.