Sympathetic vs. Parasympathetic Nervous System: Conclusion

by James Pickering, PhD

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    00:01 Now, let's just summarize in conclusion, the main differences between the sympathetic and the parasympathetic nervous systems.

    00:08 Sympathetic comes from the thoracolumbar region T1 to L3.

    00:13 Parasympathetic comes from the cranial nerves and the sacrum, So specifically, the vagus nerve, but also S2 to S4.

    00:21 Preganglionic neurons for the sympathetic nervous system are relatively short.

    00:25 The parasympathetic ones preganglionic neurons are relatively long.

    00:30 There are obviously some exceptions, but that is the general pattern.

    00:33 Postganglionic sympathetic neurons are long.

    00:36 Postganglionic parasympathetic neurons are short.

    00:40 The ganglia for the sympathetic are in the sympathetic chain.

    00:44 Abdominal prevertebral ganglia and the adrenal medulla.

    00:47 The parasympathetic ganglion are within the target organs very near to the target organs that they're going to integrate.

    00:55 The function of the sympathetic nervous system is one of catabolic in nature.

    01:00 It's fight or flight expenditure of the body's energy and resources.

    01:05 Whereas, the function of the parasympathetic is one of anabolic in nature, maintaining conservation protecting the body's resources, through rest and digest.

    01:15 There's a lot to cover in the autonomic nervous system.

    01:18 So hopefully, you found this video helpful.

    About the Lecture

    The lecture Sympathetic vs. Parasympathetic Nervous System: Conclusion by James Pickering, PhD is from the course Lymphatics and Nerves of Abdominopelvic Region.

    Included Quiz Questions

    1. Preganglionic parasympathetic neurons are long.
    2. Postganglionic sympathetic neurons are short.
    3. Sympathetic neurons are centered from T4 - T6.
    4. Sympathetic ganglia are near target organs.
    5. The parasympathetic function is mainly catabolic.

    Author of lecture Sympathetic vs. Parasympathetic Nervous System: Conclusion

     James Pickering, PhD

    James Pickering, PhD

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