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Related Concept Videos

Male Sexual Response: Erection & Ejaculation01:17

Male Sexual Response: Erection & Ejaculation

Sexual stimulation can take various forms, such as physical touch and visual or auditory cues. When this happens, the parasympathetic reflex in the sacral portion of the spinal cord is activated. This reflex stimulates the release of nitric oxide (NO), which then dilates the arterioles in the penis, increasing blood flow to the erectile tissues - the corpora cavernosa and corpus spongiosum.
The blood filling the erectile tissues compresses the veins, which helps to prevent blood from leaving...
Sperm Transport01:15

Sperm Transport

The journey of sperm from its origin to the point of ejaculation begins within the seminiferous tubules of the testis. Here, Sertoli cells produce fluid that propels non-motile sperm through a series of conduits, starting with the straight tubules leading to the rete testis. This interconnected network of tubules acts as the initial pathway for sperm, guiding them into the efferent ductules and then into the epididymis for maturation.
The maturation phase occurs in the epididymis, where sperm...
Disorders of the Male Reproductive System01:20

Disorders of the Male Reproductive System

Men's health issues are increasingly recognized as significant, with several conditions posing common threats. Among these, testicular cancer is especially prevalent in younger men, particularly those aged 20 to 35 years. The disease often manifests as a painless mass in the testicles, sometimes accompanied by a sensation of heaviness or a dull ache.
Prostate disorders are another major concern. These conditions can impair urinary flow due to the prostate's location around the urethra. Symptoms...
Mitral Valve Prolapse I: Introduction01:27

Mitral Valve Prolapse I: Introduction

IntroductionThe mitral valve, one of the heart's four valves, regulates blood flow. These valves have flaps that open and close to direct blood properly through the heart and body. During each heartbeat, the flaps open for blood to pass through and seal shut to prevent backflow. Specifically, the mitral valve opens to allow blood flow from the heart's upper left chamber to the lower left chamber. It then closes securely as the lower left chamber contracts to pump blood to the body, preventing...
Pulmonary Hypertension: Classification and Pathogenesis01:30

Pulmonary Hypertension: Classification and Pathogenesis

Pulmonary hypertension (PH) is a severe health condition in which the mean pulmonary arterial pressure increases to 25 mmHg or more, even when the body is at rest. This high pressure in the blood vessels that transport blood from the heart to the lungs can cause various symptoms, including shortness of breath, can lead to right heart failure, and significantly affect the overall quality of life.
There are various classifications for PH, each relating to different underlying causes and also...
Penis01:29

Penis

The penis serves a dual role in sexual reproduction and urination. It consists of three main regions: the glans penis, the body, and the root, each with distinct functions and unique anatomical features.
Anatomy of the Penis
The glans penis, or the head, is the terminal part of the penis and houses the external urethral orifice, the exit point for urine and semen. Covered by the prepuce, or foreskin, the glans is noted for its sensitivity and plays a key role in sexual pleasure. The body of the...

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Related Experiment Video

Updated: May 28, 2026

Treatment Model for Young Patients with Psychogenic Erectile Dysfunction and Resultant Infertility
04:22

Treatment Model for Young Patients with Psychogenic Erectile Dysfunction and Resultant Infertility

Published on: May 30, 2025

Pathophysiology of premature ejaculation.

Jacques Buvat1

  • 1Centre d'Étude et de Traitement de la Pathologie de l'Appareil Reproducteur et de la Psychosomatique, Lille, France. jacques@buvat.org

The Journal of Sexual Medicine
|October 5, 2011
PubMed
Summary

The exact causes of premature ejaculation (PE) remain unclear, with limited evidence for many proposed biological and psychological factors. Genetic and psychological elements are implicated in lifelong PE, while acquired PE may involve opioid withdrawal, inflammation, or thyroid issues.

Related Experiment Videos

Last Updated: May 28, 2026

Treatment Model for Young Patients with Psychogenic Erectile Dysfunction and Resultant Infertility
04:22

Treatment Model for Young Patients with Psychogenic Erectile Dysfunction and Resultant Infertility

Published on: May 30, 2025

Area of Science:

  • Urology
  • Sexual Medicine
  • Psychiatry

Background:

  • Premature ejaculation (PE) characteristics are known, but its precise etiology is largely undetermined.
  • Proposed contributing factors include genetic, neurobiological, pharmacological, psychological, urological, and endocrine influences.
  • PE frequently co-occurs with erectile dysfunction.

Purpose of the Study:

  • To review and summarize the proposed biological and psychological causes of PE.
  • To evaluate the evidence supporting various etiological theories of PE.

Main Methods:

  • A comprehensive literature review was conducted.
  • Analysis of current research on the pathophysiology of PE.

Main Results:

  • Many proposed biological and psychological etiologies for PE lack robust evidence or yield conflicting results.
  • Genetic and psychological factors show support in lifelong PE, potentially as causal or secondary influences.
  • Acquired PE may be linked to opioid withdrawal, prostatitis, hyperthyroidism, and psychological factors, with stronger evidence for these in specific cases.

Conclusions:

  • PE is complex and multifactorial, with partner reactions potentially worsening the condition.
  • Understanding individual etiology is crucial for appropriate PE assessment and treatment.
  • Identifying etiological factors may not fully explain PE, often necessitating multifaceted treatment strategies.