Distended Seminal Vesicles Are Involved in Specific Cerebral Sexual Arousal: A Pilot Study Using Functional Brain...

Area of Science:

• Neuroscience
• Human Sexuality
• Physiology

Background:

• The role of seminal vesicles in male sexual activity remains largely unexplored.
• Previous research has not investigated the neural processing of sexual stimuli based on seminal vesicle filling state.

Purpose of the Study:

• To evaluate specific cortical activation patterns in response to visual sexual stimuli in men with distended versus empty seminal vesicles.

Main Methods:

• A prospective case-control study involved six male participants undergoing two days of assessments.
• Assessments included hormone analysis, sexual function questionnaires, functional magnetic resonance imaging (fMRI) with emotional picture viewing, and pelvic MRI.
• Participants emptied seminal vesicles via masturbation between the two study days.

Main Results:

• No significant differences were found in hormone levels, sexual function scores, or arousal ratings between the two days.
• Seminal vesicle volume was significantly reduced on the second day (p=0.003).
• fMRI revealed significantly higher activation in the right precentral gyrus, middle frontal gyrus, and right superior temporal sulcus when viewing sexual versus neutral stimuli on the first day (filled vesicles).

Conclusions:

• Men with distended seminal vesicles exhibited heightened activation in brain regions associated with motor preparation (arousal) and the desirability of visual sexual stimuli.
• These findings suggest that the seminal vesicle filling state may modulate sexual desire in men.