BDS 1st Year Physiology | Action Potential | Most Wanted Series | Dr Jyoti Chaturvedi | One Shot

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BDS 1st Year Physiology | Action Potential | Most Wanted Series | Dr Jyoti Chaturvedi Mam | One Shot

Welcome back to the "Most Wanted Series"! In this highly requested One Shot lecture, Dr. Jyoti Chaturvedi simplifies one of the most fundamental and frequently tested topics in BDS 1st Year and MBBS Physiology: the Action Potential. Understanding how nerve impulses are generated, propagated, and regulated is the absolute bedrock of neurophysiology and general physiology.
Dr. Jyoti breaks down the complex graphs, ion channels, and phases into an easy-to-understand format perfect for your university exam preparation!

Timestamps :

00:00 – Introduction to Action Potential and link with Resting Membrane Potential
01:39 – Definition of action potential
02:17 – Two major phases: depolarization and repolarization
05:26 – Action potential curve overview: latent phase, depolarization, repolarization
07:18 – Stimulus artifact explained
08:51 – Hyperpolarization state explained
09:25 – Spike potential, overshoot, isoelectric point, after-potentials
10:40 – Firing level and threshold potential
11:39 – Clinical importance of AP graph and EMG
21:34 – Ionic basis of action potential begins
23:35 – Threshold/firing level and all-or-none law
26:23 – Sodium channel inactivation and potassium channel activation
29:02 – Refractory period: absolute vs relative
34:42 – Monophasic, biphasic, and compound action potential
38:56 – Graded potential vs action potential and concept-to-clinic applications

In this video, we cover :

Introduction & Basics: What is the Resting Membrane Potential (RMP) and why is it important?
Phases of an Action Potential: A step-by-step breakdown of Depolarization, Repolarization, and Hyperpolarization.
The Role of Ion Channels: How voltage-gated Sodium ($Na^+$) and Potassium ($K^+$) channels dictate the action potential curve.
Key Physiological Principles: Understanding the Threshold Potential and the All-or-None Law.
Refractory Periods: The difference between Absolute and Relative refractory periods and their clinical significance.
Propagation of the Impulse: Continuous conduction in unmyelinated fibers vs. Saltatory conduction in myelinated nerve fibers.
Whether you are trying to understand the action potential graph for your internal assessments, or revising for your final university and NEET MDS/PG exams, this one-shot video has all the high-yield concepts you need!
📚 Be sure to check out the full Physiology Most Wanted Series playlist on our channel!
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