Refractory period by Dr. Ashish Kumar
Автор: Medical Content
Загружено: 2025-10-13
Просмотров: 33
In this lecture, Dr. Ashish Kumar explains the concept of the refractory period in nerve and muscle physiology — a fundamental topic in understanding action potentials and neural excitability.
Learn how and why neurons and muscle fibers temporarily lose their ability to respond to new stimuli after depolarization. The session includes clear diagrams, easy-to-follow explanations, and clinical insights to make complex physiology simple and memorable.
📘 Topics Covered:
• Definition of refractory period
• Absolute vs. Relative refractory period
• Ionic basis of refractory phases
• Role of voltage-gated Na⁺ and K⁺ channels
• Significance in nerve impulse conduction and cardiac physiology
• Clinical relevance: Arrhythmias, nerve fatigue, and excitability disorders
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