If sexual desire is caused by the dominance of the parasympathetic nervous system...

Submitted by Yuuichi on
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Are there any quick and safe ways to activate the sympathetic nervous system, which should reduce the influence of the parasympathetic nervous system and therefore reduce sexual desire?

Apologies if what I describe isn’t exactly how the nervous system in the human body actually works, I’m not an expert in this field. Usually, when one thinks of the sympathetic nervous system, one thinks of stress and tension, but I’m sure there is a relaxing way of activating the sympathetic nervous system, in harmony with the body so not to cause stress.

I mean things like breathing exercises, not anything weird.

Exercise and meditation

are both helpful. But I would say they work because they help restore balance in the brain.

I think my wording has confused you. Sympathetic nerve activation (which occurs in the body, not brain) doesn't "cause" libido. Some of these nerves are activated during ejaculation. Some of the parasympathetic nerves in the body are activated during arousal. The complexity of the situation can be seen in this article: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5340504/

Here's an excerpt:

Neurological Control of Sexual Responses

Peripheral innervations of the pelvis involve 3 sets of efferent neurons coordinated though the pelvic plexus: somatic, thoracolumbar sympathetic, and sacral parasympathetic. Since there is cerebral descending excitatory and inhibitory control over the pelvic innervations, sexual responses are modulated by minute-to-minute cerebral influences and neurotransmitter alterations. The motor and sensory somatic control is via the pudendal nerve, and the 2 components of the autonomic system are via the pelvic nerve (sacral parasympathetic) and hypogastric nerve (thoracolumbar sympathetic). The somatic afferent (motor) pathways are essential for initiation of the pelvic floor muscles contractions. The afferent (sensory) pathway involved in sensory innervations of the genitalia includes the hypogastric, pelvic, and vagus nerves and those responsible for mechanosensitivity (sensation of touch and pressure), thermosensitivity (sensation of temperature),and chemosensitivity (ie,irritants), all of which contribute to sexual interpretation of genital stimulation. It should be remembered that the whole body is sensitive to sexual touching, with erogenous hotspots consisting of genitals, breasts, and anus: This becomes important after neurological injury or insensate genitalia.

The autonomic nervous system is composed of the sympathetic and parasympathetic systems, which are integrated functionally within the central nervous system and provide balanced regulation of most of the visceral organs. Both divisions of the autonomic nervous system have preganglionic and postganglionic neurons that are interposed between the central nervous system and target organs. The cell bodies of the preganglionic neurons in the gray matter of the brain or spinal cord and their axons, called preganglionic fibers, travel within the ventral roots of the spinal cord or cranial nerves. The preganglionic fibers synapse with the postganglionic neurons in autonomic ganglia. The axons of these neurons, postganglionic fibers, innervate target organs. Sympathetic preganglionic neurons reside in the spinal gray matter of the thoracic and upper lumbar segments (T1-L2) and synapse on postganglionic sympathetic neurons of the spinal paravertebral sympathetic chain ganglia and the celiac, superior, and inferior mesenteric ganglia (prevertebral ganglia). The sympathetic nervous system innervates the heart, blood vessels, respiratory tract, sweat glands, sexual organs, bowel, and bladder (Figure 1). Parasympathetic preganglionic neurons originate in the brainstem (cranial nerves III, VII, IX, X) and in the sacral spinal cord segments (S2-S4). In addition to the sacral parasympathetic control of the pelvic organs, cranial nerve X (vagus) contributes to innervation of the uterus and vaginal wall. The parasympathetics do not innervate the peripheral vasculature except for the pelvic organs. The bladder, reproductive organs, and lower portion of the gut receive parasympathetic innervation from S2–S4.

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Innervation of the pelvic organs and male genitalia. In the pelvic organs and genitalia, there are 3 main tissue types: secretory, erectile, and striated muscle. The majority of the autonomic innervation to these tissues comes from the bilateral pelvic ganglia, which contains both sympathetic and parasympathetic neurons. Parasympathetic preganglionic neurons originate in the sacral cord (S2-S4) and travel in the pelvic nerve to the pelvic ganglia. Sympathetic innervation originates in the lower thoracic and lumbar cord (T10-L2) and travels via the hypogastric nerves to innervate the pelvic ganglia; sympathetic nerves also travel to the pelvic plexus via the pelvic nerve, which is mixed sympathetic and parasympathetic. These plexuses form a diffuse neural network on either side of the prostate (males) or cervix (females). In both sexes, the largest nerve exiting from the pelvic plexus is the cavernous nerve (also called penile nerve in males). Only innervation of the seminal vesicles is illustrated here. Somatic innervation of the striated perineal muscles, which include the ischiocavernosus, bulbocavernosus, and levator ani, originates in the sacral spinal cord segments (S2-S4). Afferent information from the pelvic organs is relayed to the spinal cord via the “genito-spinal” nerves (pelvic, hypogastric, and pudendal; only the pelvic nerve is illustrated here), and sensory pathways ascend bilaterally in the dorsal quadrant of the spinal cord. Reprinted with permission from Krassioukov AV, Biering-Sorensen F, Donovan W, et al. International Standards to document remaining Autonomic Function after Spinal Cord Injury (ISAFSCI), First Edition 2012. Top Spinal Cord Inj Rehabil. 2012;18(3):290. Copyright © 2012 Thomas Land Publishers, Inc.

Male and female sexual organs receive sympathetic innervation via the hypogastric nerve and parasympathetic innervation via the pelvic nerve. Psychogenic erection and vaginal lubrication are mediated via the sympathetic fibers in conjunction with the parasympathetic, whereas reflex erection and vaginal lubrication are mediated by the parasympathetic nervous system., Ejaculation is a more complicated phenomenon and requires coordination of the sympathetic (T11-L2) and parasympathetic (S2-4) spinal centers in addition to the somatic nervous system via the pudendal nerve (S2-5). More detailed information on this topic can be found in previously published manuscripts.,

For practical help in balancing your libido, maybe check out the pages here:

I Am MoreThan My Parts

I am not sympathetic or parasympathetic
I am not oxytocin or prolactin
I am not what I eat or believe
I am no my karma or how I move
I am not my body parts or my job
I am more than all those pieces
I am a whole human.

Example: I have poor vision. I test 20/400 and 20/200 (thank intelligent compassionate technology that lenses correct to 20/35). BUT I was recently tested with a third quiz, read the chart with both eyes. I thought how could that be better than my best eye? yet I tested 20/135! I am human, all of my parts work better together than any one piece!