The Reptilian Brain, Your Body’s Gas and Brake Pedals, and Why You React the Way You Do
Ever wonder why your heart races before a big presentation, why you snap at someone you love when you’re stressed, or why it feels impossible to calm down once you’re worked up? The answer lies in the tug-of-war between your reptilian brain , your sympathetic nervous system (SNS) , and your parasympathetic nervous system (PNS) . Think of these three as a castle, a guard, and two levers — one that raises the drawbridge in a panic, and one that lowers it so peace can return. 🦎 The Reptilian Brain: The Castle Guard The reptilian brain — your brainstem and basal ganglia — is the oldest, most primal part of your brain. If your brain were a castle, the reptilian brain is the guard stationed at the front gate, always scanning for trouble . It doesn’t care about social etiquette or your carefully planned calendar. Its job is survival — keep the drawbridge up when danger is near. When this guard senses a threat (real or imagined), it hits the alarm bell and wakes up the entire castle. Sudden...