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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.
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Stroke: Introduction and Types01:29

Stroke: Introduction and Types

A stroke is an acute neurological event caused by the sudden disruption of cerebral blood flow, leading to rapid loss of neuronal function. Neurons depend on continuous oxygen and glucose supply, so even brief interruptions can cause irreversible injury within minutes. Strokes are classified into ischemic and hemorrhagic types.Ischemic StrokeIschemic strokes are most common and occur due to arterial occlusion, depriving brain tissue of oxygen and nutrients. This leads to energy failure, ionic...
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Ischemic Stroke l: Introduction

Ischemic stroke is an acute cerebrovascular condition in which blood flow to a brain region is suddenly interrupted, leading to tissue infarction. Neurons depend on continuous oxygen and glucose supply, so even brief reductions in perfusion cause energy failure, ionic imbalance, and irreversible injury. Ischemic strokes are classified into thrombotic and embolic types based on their underlying mechanisms.Thrombotic MechanismsThrombotic stroke develops when a clot forms within a cerebral artery.
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Ischemic Stroke ll: Pathophysiology

An ischemic stroke occurs when a cerebral blood vessel becomes obstructed, most often by a thrombus or embolus, interrupting the delivery of oxygen and glucose to brain tissue. Because neurons rely on continuous aerobic metabolism, energy failure begins within minutes of reduced perfusion. The region receiving the least blood flow becomes the infarct core, an area of irreversible cellular death. Surrounding this core lies the penumbra, a zone of hypoperfused but still viable tissue that is...
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A transient ischemic attack (TIA) is a brief episode of neurological dysfunction caused by a temporary, focal reduction in cerebral blood flow. Although symptoms resemble those of an ischemic stroke, the interruption in perfusion is short-lived and does not cause permanent infarction. TIAs are clinically important because they often serve as early warning events for future stroke.Mechanisms of Transient Cerebral IschemiaTransient cerebral ischemia may arise through several mechanisms. One...
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Sex after stroke: a CNS only dysfunction?

Francesca Pistoia1, Stefano Govoni, Cinzia Boselli

  • 1Department of Experimental and Applied Pharmacology, University of Pavia, Viale Taramelli 14, 27100 Pavia, Italy.

Pharmacological Research
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Summary

Sexual dysfunction is common after stroke, affecting patient quality of life. New research suggests central nervous system (CNS) autonomic dysfunction may also play a role in male sexual health post-stroke.

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Area of Science:

  • Neuroscience
  • Urology
  • Sexual Medicine

Background:

  • Sexual dysfunction is a frequent complication following stroke, significantly impacting patients' quality of life.
  • Current understanding links post-stroke sexual changes to impaired brain regions controlling libido and sexual behavior.
  • Co-morbidities, general health, and psychological factors are recognized determinants of sexual function after stroke.

Purpose of the Study:

  • To explore the potential role of central nervous system (CNS)-driven autonomic dysfunction in post-stroke sexual dysfunction.
  • To investigate novel interpretations and potential treatment avenues for sexual dysfunction following stroke.

Main Methods:

  • Review of existing literature on stroke, sexual dysfunction, and autonomic nervous system function.
  • Analysis of findings from animal models investigating CNS-autonomic pathways and male reproductive function.
  • Synthesis of current knowledge to propose new hypotheses regarding stroke's impact on sexual health.

Main Results:

  • Evidence suggests a potential role for CNS-driven autonomic system dysfunction in the male reproductive tract after stroke, identified in animal models.
  • This autonomic dysfunction may contribute to sexual dysfunction in a subset of stroke patients.
  • Emerging data opens new avenues for understanding and potentially treating sexual dysfunction post-stroke.

Conclusions:

  • Central nervous system autonomic dysfunction is an emerging factor to consider in post-stroke sexual dysfunction.
  • This understanding may lead to novel therapeutic strategies targeting autonomic pathways for affected patients.
  • Further research is warranted to elucidate the precise mechanisms and clinical implications.