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Premature ejaculation (PE) is common, but its true pathophysiology is not clear, and treatments are limited. We aimed to investigate the effect of neuromuscular electrical stimulation applied in different modes and frequencies to the bulbospongiosus muscle on ejaculation parameters. In this study, 24 male Wistar albino rats were used. The rats were equally divided into three groups: control, high-frequency burst (HFB) and low-frequency (LF) (n = 8 each). Neuromuscular electrical stimulation was applied to the rats for 30 min. In the HFB group, this stimulation was applied in the burst mode at 80 Hz frequency using 200 microseconds (µs) transition time. In the LF group, manual stimulation was applied using a 2 Hz frequency and 200 µs transition time. Following the intraperitoneal administration of para-chloroamphetamine at a dose of 5 mg/kg, ejaculation time, increase in basal seminal vesicle pressure, seminal vesicle maximum pressure, number and interval time of seminal vesicle contractions and bulbospongiosus muscle electromyography activities were evaluated over 30 min. There was a significant difference between the groups in terms of ejaculation time (p = 0.002). The ejaculation times of the LF, HFB and control groups were 1344.71 ± 105.9, 908 ± 62 and 672 ± 149.7 s, respectively. The post hoc analysis revealed that the ejaculation time of the LF group was significantly longer than that of the HFB and control groups (p = 0.033 and p = 0.001, respectively). The remaining parameters did not differ significantly between the groups. The results showed that low-frequency (2 Hz) electrical stimulation applied to the male rats significantly prolonged the ejaculation time. It is thus considered that applying neuromuscular electrical stimulation before planned sexual activity can prevent the rhythmic contractions necessary for completing the ejaculatory process by maintaining subtetanic continuous contraction and prolonging the ejaculation time in patients with premature ejaculation complaints.
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http://dx.doi.org/10.1038/s41443-023-00678-5 | DOI Listing |
Front Med (Lausanne)
December 2024
Section of Neurobiology of the Eye, Ophthalmic Research Institute, University of Tübingen, Tübingen, Germany.
Purpose: Changes in choroidal thickness (ChT) are proposed to predict myopia development but evidence is mixed. We investigated time courses of choroidal responses, following different types of dynamic artificial stimulation in chicks with and without spectacle lenses, as well as changes in retinal dopamine metabolism and expression of candidate genes.
Methods: Chicks were kept in an arena surrounded by computer monitors presenting dynamic checkerboard fields of small, medium and large size.
Cent Eur J Immunol
November 2024
Department of Emergency, People's Hospital of Ningxiang City, Ningxiang, Hunan, China.
Introduction: Neonatal sepsis (NS) seriously threatens the health of infants. Coactosin-like protein 1 (COTL1) is a binding protein of F-actin and 5-lipoxygenase which is known to regulate the progression of neonatal sepsis. Nevertheless, the function of COTL1 in NS is not clear.
View Article and Find Full Text PDFFront Neurosci
December 2024
Research and Exploratory Development Department, Johns Hopkins University Applied Physics Laboratory, Laurel, MD, United States.
Objective: Targeted transcutaneous electrical nerve stimulation (tTENS) is a non-invasive neural stimulation technique that involves activating sensory nerve fibers to elicit tactile sensations in a distal, or referred, location. Though tTENS is a promising approach for delivering haptic feedback in virtual reality or for use by those with somatosensory deficits, it was not known how the perception of tTENS might be influenced by changing wrist position during sensorimotor tasks.
Approach: We worked with 12 able-bodied individuals and delivered tTENS by placing electrodes on the wrist, thus targeting the ulnar, median, and radial nerves, and eliciting tactile sensations in the hand.
Front Bioeng Biotechnol
December 2024
Karl Chiari Lab for Orthopaedic Biology, Department of Orthopedics and Trauma Surgery, Medical University of Vienna, Vienna, Austria.
Biomechanical (over-)stimulation, in addition to inflammatory and fibrotic stimuli, severely impacts the biology, contributing to the overall chronic nature of desmopathy. A major challenge has been the lack of representative two-dimensional (2D) models mimicking inflammatory processes in the presence of dynamic mechanical strain, both being crucial for ligament homeostasis. Physiological levels of strain exert anti-inflammatory effects, while excessive strain can facilitate inflammatory mechanisms.
View Article and Find Full Text PDFChin Med
December 2024
Department of Neurobiology, School of Basic Medicine, Tongji Medical College, Key Laboratory of Neurological Diseases of Hubei Province and National Education Ministry, Huazhong University of Science and Technology, Wuhan, 430030, China.
Background: Chronic inflammatory pain is a pervasive condition, and electroacupuncture (EA) is an effective treatment, but its mechanisms are not fully understood. AMP-activated protein kinase (AMPK), a key energy sensor, is involved in pain relief and EA's effects. EA may work by increasing endocannabinoids, upregulating CB2 receptors (CB2R), and stimulating β-endorphin (β-END).
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