Kihara K, Sato K, Ando M, Morita T, Oshima H
Department of Urology, School of Medicine and School of Allied Health Science, Faculty of Medicine, Tokyo Medical and Dental University, Japan.
Am J Physiol. 1993 Oct;265(4 Pt 2):R743-8. doi: 10.1152/ajpregu.1993.265.4.R743.
To investigate the route of efferent signals for seminal emissions from ejaculatory ducts (SEEDs), canine lumbar splanchnic nerves (LSNs) were electrically stimulated. SEED was confirmed by visual verification of seminal flow into the exposed posterior urethra. In intact dogs, electrical stimulation of an LSN caused bilateral SEEDs in 13 of 16 dogs examined, with a greater volume at the stimulated side. After transection of a unilateral hypogastric nerve, bilateral SEEDs occurred by electrical stimulation of the contralateral LSN in 11 of 14 dogs with a greater volume at the stimulated side and by the stimulation of the ipsilateral LSN in 13 of 15 dogs with a greater volume at the contralateral side. Contraction pressure of the epididymal tail under the same conditions harmonized with the above results. We conclude that each LSN generates bilateral SEEDs by sending signals to bilateral epididymal tails and that some of the signals through each LSN cross to the other side at the caudal mesenteric plexus and/or the prostatic plexus.
为了研究射精管射精（SEEDs）的传出信号通路，对犬的腰内脏神经（LSNs）进行了电刺激。通过目视确认精液流入暴露的后尿道来证实SEEDs。在完整的犬中，对16只受试犬中的13只进行LSN电刺激后出现双侧SEEDs，刺激侧的精液量更多。单侧腹下神经横断后，对14只犬中的11只进行对侧LSN电刺激时出现双侧SEEDs，刺激侧的精液量更多；对15只犬中的13只进行同侧LSN电刺激时也出现双侧SEEDs，对侧的精液量更多。在相同条件下附睾尾的收缩压力与上述结果一致。我们得出结论，每条LSN通过向双侧附睾尾发送信号来产生双侧SEEDs，并且通过每条LSN的一些信号在肠系膜尾丛和/或前列腺丛处交叉到另一侧。
