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Neurons for Ejaculation and Factors Affecting Ejaculation.

Kiran Kumar Soni1, Han-Seong Jeong1, Sujeong Jang1

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Biology
|May 28, 2022
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Summary

Ejaculation is controlled by lumbar spinothalamic (LSt) cells in the spinal cord, acting as generators for this reflex. Further research is needed on animal models to understand human ejaculatory dysfunctions.

Keywords:
ejaculationejaculatory dysfunctionslumbar spinothalamic cellsspinal ejaculatory generator

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Area of Science:

  • Neuroscience
  • Urology
  • Reproductive Biology

Background:

  • Ejaculation is a complex reflex in male mammals, involving emission and expulsion phases coordinated by urogenital organs.
  • The L3-L4 spinal cord segment contains lumbar spinothalamic (LSt) cells, identified as the spinal ejaculation generators.
  • Ejaculatory dysfunctions like premature ejaculation (PE), retrograde ejaculation (RE), delayed ejaculation (DE), and anejaculation (AE) affect human sexual health.

Purpose of the Study:

  • To elucidate the role of lumbar spinothalamic (LSt) cells in controlling ejaculation.
  • To highlight the current understanding of ejaculatory mechanisms and dysfunctions.
  • To identify research gaps in animal models for human ejaculatory dysfunction.

Main Methods:

  • Review of existing literature on ejaculation and spinal cord control.
  • Analysis of the physiological phases of ejaculation: emission and expulsion.
  • Identification of the neural pathways and cellular mechanisms involved in ejaculation.

Main Results:

  • Lumbar spinothalamic (LSt) cells in the L3-L4 spinal cord segment are confirmed as the central generators for ejaculation.
  • LSt cell activation coordinates with autonomic parasympathetic and sympathetic systems to facilitate ejaculation.
  • Human spinal ejaculatory generators have been recently confirmed, yet research on animal models is limited.

Conclusions:

  • The spinal ejaculatory generator, comprised of LSt cells, plays a crucial role in male ejaculation.
  • Understanding LSt cell function is key to addressing various ejaculatory dysfunctions.
  • There is a significant need for more research using animal models that accurately mimic human ejaculatory dysfunctions.