Facilitation and inhibition of the urethrogenital reflex in spinal cord-transected rats

Brain Research
I DuránR Cueva-Rolón

Abstract

It was evaluated in the spinal cord-transected rats whether the urethrogenital (UG) reflex shows some of the features that are present during ejaculation in intact animals. It was found that the UG reflex was facilitated after its first elicitation: the latency of the reflex was shorter than the previous one and low intensity of stimulation was needed to produce the reflex. In addition, a change in the latency of the reflex was found that was correlated with the number of stimulation trials. The latency change showed a J-shaped curve that is similar to that found for the ejaculation latency in a copulatory series. An inhibition of the reflex appeared after several trials: the reflex could not be elicited after three continuous trials. The reflex could be elicited again if the intensity of stimulation was increased. The UG reflex also showed 'exhaustion': it could not be elicited, even with high intensities of stimulation, after 3 h of rest. All these findings were present when the UG reflex was elicited by applying pressure to the urethra or when it was evoked by the electrical stimulation to the pudendal nerve. According to these findings, it can be concluded that the UG reflex maintains some of the features that are found dur...Continue Reading

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Citations

May 5, 2005·Pharmacology, Biochemistry, and Behavior·Lisbeth E GómezRafael Cueva-Rolón
Dec 22, 2000·Pharmacology, Biochemistry, and Behavior·L GilR Cueva-Rolón
Feb 19, 2000·Behavioural Brain Research·M Carro-Juárez, G Rodríguez-Manzo
Aug 21, 2013·Indian Journal of Urology : IJU : Journal of the Urological Society of India·Gaetano GulinoPierfrancesco Bassi
May 20, 2009·Behavioural Brain Research·Lisbeth E Gómez-Martínez, Rafael Cueva-Rolón
Jan 10, 2013·Journal of Ethnopharmacology·R Estrada-ReyesL Martínez-Mota
Mar 22, 2014·Journal of Evidence-based Complementary & Alternative Medicine·Miguel Carro-JuárezMaría de Lourdes Rodríguez-Peña
Feb 14, 2004·International Journal of Impotence Research·V M VargasR Cueva-Rolón

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