3 Tutorials that teach Peripheral Nervous System (PNS)
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Peripheral Nervous System (PNS)

Peripheral Nervous System (PNS)

Author: Barbara Ludins

This lesson will differentiate between the Somatic Nervous System and the Autonomic Nervous System that make up the Peripheral Nervous System.

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Introduction to Psychology

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Notes on "Peripheral Nervous System"


(00:00-02:05) Somatic Nervous System

(02:06-02:47) Autonomic Nervous System

(02:48-03:12) Sympathetic Branch

(03:13-03:47) Parasympathetic Branch

(03:48-04:18) Recap

  • Somatic Nervous System

    Nerves connected to the sense organs and skeletal muscles, which control voluntary movement, reflexes, and sensory neurons.

  • Autonomic Nervous System

    Nerves connected to internal organs, which control internal, involuntary body functions (like breathing, heart rate, and digestion).

  • Sympathetic Nervous System

    Controls body responses related to “flight or fight” response, when feel like in danger.

  • Reflex Arc

    Simple, automatic responses to stimuli.

  • Sensory Neurons

    Neurons that send information to brain from sense organs.

  • Parasympathetic Nervous System

    Helps to maintain normal body functions and calm it down when excited by the sympathetic nervous system.