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Changes of Cerebral Current Source by Audiovisual Erotic Stimuli in Premature Ejaculation Patients

Jae-Seog Hyun, MD, PhD,* Sung-Chul Kam, MD,* and Oh-Young Kwon, MD, PhD†
*Department of Urology, Gyeongsang National University School of Medicine, Jinju, South Korea; †Department of
Neurology, Gyeongsang National University School of Medicine, Jinju, South Korea
DOI: 10.1111/j.1743-6109.2007.00734.x

ABSTRACT

Introduction. Premature ejaculation (PE) is one of the most common forms of male sexual dysfunction. The
mechanisms of PE remain poorly understood, despite its high prevalence.
Aim. To investigate the pathophysiology and casuses of PE in the central nervous system, we tried to observe the
changes in brain current source distribution by audiovisual induction of sexual arousal.
Methods. Electroencephalograpies were recorded in patients with PE (45.0 +/- 10.3 years old, N = 18) and in
controls (45.6 +/- 9.8 years old, N = 18) during four 10-minute segments of resting, watching a music video excerpt,
resting, and watching an erotic video excerpt. Five artifact-free 5-second segments were used to obtain cross-spectral
low-resolution brain electromagnetic tomography (LORETA) images.
Main Outcome Measures. Statistical nonparametric maps (SnPM) were obtained to detect the current density
changes of six frequency bands between the erotic video session and the music video session in each group.
Comparisons were also made between the two groups in the erotic video session.
Results. In the SnPM of each spectrum in patients with PE, the current source density of the alpha band was
significantly reduced in the right precentral gyrus, the right insula, and both superior parietal lobules (P < 0.01).
Comparing the two groups in the erotic video session, the current densities of the beta-2 and -3 bands in the PE
group were significantly decreased in the right parahippocampal gyrus and left middle temporal gyrus (P < 0.01).
Conclusions. Neuronal activity in the right precental gyrus, the right insula, both the superior parietal lobule, the
right parahippocampal gyrus, and the left middle temporal gyrus may be decreased in PE patients upon sexual
arousal.

Further studies are needed to evaluate the meaning of decreased neuronal activities in PE patients. Hyun
J-S, Kam S-C, and Kwon O-Y. Changes of cerebral current source by audiovisual erotic stimuli in premature
ejaculation patients. J Sex Med **;**:**–**.

Key Words. Premature Ejaculation; Sexual Stimulation; LORETA; EEG


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1 comentario:

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