Autonomic Innervation: Summary

by James Pickering, PhD

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    00:00 autonomic nerves supplying the organs within the pelvic.

    00:01 Now what Ii have got here is just the summary of the fact sympathetic and parasympathetic has on the specific organs.

    00:10 So if we are looking at the gastrointestinal tract, the sympathetic is going to inhibit peristalsis, constrict blood vessels and contract the internal anal sphincter.

    00:23 Parasympathetic is going to do the opposite. It will stimulate peristalsis and promotes the secretion of digestive juices.

    00:33 It's important in relaxing the internal anal sphincter in defecation.

    00:36 But remember we have that final barrier we have the external anal sphincter controlled by the somatic nervous system.

    00:43 If we look at the pancreas for example, sympathetic is going to inhibit it's insulin secretions.

    00:49 Parasympathetic will stimulate it. The liver and gallbladder: sympathetic will stimulate the breakdown of glycogen to glucose. So you can become active.

    01:01 Parasympathetic will stimulate the conversion of glucose to glycogen when you are not using up that energy.

    01:06 It will also increase the secretions and production of bile.

    01:11 For the urinary tract, you have the slowing of urine production by vasoconstriction with sympathetic.

    01:18 You have contraction of the internal urethral sphincter associated with micturition, the sympathetic effect.

    01:24 Parasympathetic is going to contract the detrusor muscles of the bladder.

    01:29 Inhibit contraction of the internal urethral sphincter.

    01:32 The suprarenal glands didn't really mention those but these are on extension specially the medulla of the sympathetic nervous system.

    01:42 And this promotes the sympathetic response by releasing adrenaline.

    01:45 And the genital system. We have the sympathetic which induces ejaculation.

    01:52 And the remission of engorgement due to vasconstriction.

    01:54 Whereas the parasympathetic is going to produce engorgement of those erectile tissues.

    About the Lecture

    The lecture Autonomic Innervation: Summary by James Pickering, PhD is from the course Pelvis.

    Included Quiz Questions

    1. Ejaculation
    2. Relaxation of the internal urethral sphincter
    3. Increased insulin secretion
    4. Erection
    5. Stimulation of peristalsis

    Author of lecture Autonomic Innervation: Summary

     James Pickering, PhD

    James Pickering, PhD

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