Dail W G, Trujillo D, de la Rosa D, Walton G
Department of Anatomy, University of New Mexico School of Medicine, Albuquerque 87131.
Anat Rec. 1989 May;224(1):94-101. doi: 10.1002/ar.1092240112.
An understanding of the composition of the various nerves of the pelvic plexus is essential in the design of studies to explore the autonomic control of pelvic visceral tissues. As a correlate of this interest, the present study was designed to determine the composition of the main penile nerve in the pelvic plexus of the laboratory rat, an animal commonly used for studies of reproductive physiology. Retrograde tracing studies indicate that the main penile nerve contains neurons which project to the penile crura, the corpus spongiosum, and the bulbourethral glands. The main penile nerve is the major source of neurons which innervate the corpus spongiosum and bulbourethral gland and contains about one-third of all parasympathetic neurons which project to the penile crura. Dye placed on the proximal cut end of the main penile nerve indicates that neurons in the parasympathetic region of the spinal cord (L6-S1) and to a lesser extent a sympathetic region of the cord, L1-L2, provide preganglionic innervation to ganglion cells in the main pelvic nerve. Processes of neurons in dorsal root ganglia L6-S1 and of neurons in the abdominopelvic sympathetic chain course in the main penile nerve to unknown destinations. In many respects this presumed postganglionic fiber tract is essentially a region of the pelvic plexus which subserves extrapelvic visceral tissues.
了解盆腔丛各神经的组成对于设计探索盆腔内脏组织自主控制的研究至关重要。作为这种兴趣的一个相关方面，本研究旨在确定实验室大鼠盆腔丛中主要阴茎神经的组成，大鼠是常用于生殖生理学研究的动物。逆行追踪研究表明，主要阴茎神经包含投射至阴茎脚、海绵体和尿道球腺的神经元。主要阴茎神经是支配海绵体和尿道球腺的神经元的主要来源，并且包含投射至阴茎脚的所有副交感神经元的约三分之一。置于主要阴茎神经近端切断端的染料表明，脊髓副交感神经区域（L6 - S1）以及程度较轻的脊髓交感神经区域L1 - L2的神经元为主要盆腔神经中的神经节细胞提供节前神经支配。L6 - S1背根神经节的神经元以及腹盆腔交感神经链的神经元的突起在主要阴茎神经中走行至未知目的地。在许多方面，这条假定的节后纤维束本质上是盆腔丛中一个为盆腔外内脏组织服务的区域。
