Generation of an Action Potential | Step-by-Step Explanation

How does a neuron actually fire? What makes an electrical signal race down its axon? In Episode 2 of The Brain Unfolded, we go inside the neuron to uncover the action potential from resting potential and threshold to depolarization, repolarization, hyperpolarization, and saltatory conduction. A neuron may look quiet from the outside, but beneath its membrane, an extraordinary electrical process is constantly at work. In this episode, we explore: 🧠 The structure of a neuron: how dendrites, the soma, and the axon each contribute to communication. ⚡ Resting potential: how a neuron maintains an electrical charge even when it's not firing. 🔵 Sodium ions (Na⁺): how their movement into the neuron triggers depolarization. 🟣 Potassium ions (K⁺): how their movement out of the neuron brings the membrane back toward rest. 📈 The threshold and all-or-nothing principle: why a neuron either fires completely or doesn't fire at all. ⚡ The action potential: the rapid rise and fall of the neuron's electrical charge. 🔄 Repolarization and hyperpolarization: what happens after the peak. ⏱️ The refractory period: why a neuron needs a brief moment before it can fire again. 🚀 Saltatory conduction: how myelin and the nodes of Ranvier allow signals to travel rapidly along an axon. Finally, we reach the next question: If neurons don't actually touch, how does this electrical signal cross the gap between them? That's where we'll go next. Welcome to The Brain Unfolded. 🧠 The Brain Unfolded Neuroscience explained through cinematic scientific storytelling. Subscribe for the next episode, where we uncover what happens when the action potential reaches the synapse ▶️ Watch Episode 1:   • The Cells That Make You Think | Introducti...   #Neuroscience #ActionPotential #Neurons #TheBrainUnfolded