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07:04
Physiological, Morphological and Neurochemical Characterization of Neurons Modulated by Movement
Published on: April 21, 2011
Neuroanatomy and physiology of ejaculation
François Giuliano1, Pierre Clement
1Pelvipharm Laboratories, Neuro-Urology Unit, Department of Physical Medicine and Rehabilitation, Raymond Poincaré Hospital, Garches, France. giuliano@cyber-sante.org
Annual Review of Sex Research
|August 18, 2006
Summary
Normal male ejaculation involves two phases: emission and expulsion. This process requires intricate coordination between the nervous system
Area of Science:
- Reproductive biology
- Neuroscience
- Physiology
Background:
- Ejaculation is the expulsion of sperm from the male urethra.
- It comprises two distinct phases: emission and expulsion.
- Normal ejaculation necessitates coordinated neural control.
Purpose of the Study:
- To elucidate the neuroanatomical and physiological underpinnings of normal male ejaculation.
- To detail the coordinated roles of the autonomic and somatic nervous systems in ejaculation.
Main Methods:
- Review of neuroanatomical pathways involved in ejaculation.
- Analysis of physiological control mechanisms governing emission and expulsion phases.
- Examination of spinal and supraspinal regulatory centers.
Main Results:
- Ejaculation involves coordinated sympathetic, parasympathetic, and somatic nervous system activity.
- Peripheral anatomical structures (glands, ducts, muscles) are controlled by spinal centers.
- Spinal ejaculatory centers receive input from genital sensory afferents and supraspinal brain regions.
Conclusions:
- Normal antegrade ejaculation is a complex reflex requiring precise neural integration.
- Spinal cord nuclei act as central ejaculatory generators, modulated by sensory and descending brain signals.
- Understanding these pathways is crucial for addressing ejaculatory dysfunctions.
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