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Nervous System: Structure and Function of the Peripheral Nervous System – Biological Bases of Behavior (PSY, BIO)

by Tarry Ahuja, MD
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    Okay. So now, we’re going to look at that -- we’re going to continue to look at some of that organization of the nervous system. So, very quickly we have two bins, the CNS, the PNS, central nervous system, peripheral nervous system. This is not new terms for you, I’m sure. And I’m sure you’re familiar with what they represent. Simply put the central nervous system is the brain and spinal cord and the peripheral nervous system is everything else. So it’s referring to all the nerves and the sensory structures outside of the brain and spinal cord. So, we can break down the PNS a little bit further. We have the somatic system and the autonomic system with the autonomic -- the autonomic containing the involuntary control of glands and smooth muscle. And the name autonomic refers to the fact that it’s essentially automatic. So you’re not sitting there right now thinking, “I need to think about stomach digesting or I need to think about breathing.” It just happens, right? So that means it’s done automatically and this is all involuntary control. It includes the sympathetic and parasympathetic systems, which is the fight or flight or rest and digest, and we’ve talked about those quite a bit. And you recall from the previous or upcoming lectures, fight or flight is in response to a stimulus. Are you going to stay there and address the stimulus that’s in front of you fight or are you going to turn around and run away. So the analogy that’s always used is caveman days being presented with a tiger or a, you know, something else. So saber-toothed tiger is about to attack you, are you going to stay and fight, or are you going to turn around and run back to your cave?...

    About the Lecture

    The lecture Nervous System: Structure and Function of the Peripheral Nervous System – Biological Bases of Behavior (PSY, BIO) by Tarry Ahuja, MD is from the course Individual Influences on Behavior. It contains the following chapters:

    • Organization of the Nervous System
    • Sympathetic vs. Parasympathetic Nervous System

    Author of lecture Nervous System: Structure and Function of the Peripheral Nervous System – Biological Bases of Behavior (PSY, BIO)

     Tarry Ahuja, MD

    Tarry Ahuja, MD


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