Kuo D C, Yang G C, Yamasaki D S, Krauthamer G M
J Comp Neurol. 1982 Sep 1;210(1):49-58. doi: 10.1002/cne.902100106.
The fiber composition of the left major splanchnic nerve was studied in cats by electron microscopy. Comparisons were made between normal and partially degenerated nerve specimens following ventral rhizotomy (T3-L1), or spinal nerve division (T3-L1). Normal, major splanchnic nerves contained 2,500-4,000 myelinated and 10,000-15,000 unmyelinated fibers. Preganglionic fibers included approximately 90% of the finely myelinated (1-7 micrometers) and over 50% of the unmyelinated fibers. Removal of the sensory and preganglionic components by spinal nerve division revealed a third postganglionic fiber category. This included 13-38 small myelinated (1-5 micrometers) and 1,645-7,619 unmyelinated fibers. Finally, a comparison of normal and partially degenerated nerve specimens of both groups (ventral rhizotomy and spinal nerve cut) indicated that splanchnic afferents are made up of virtually all of the 120-350 large myelinated (8-14 micrometers) and 10% of the small myelinated (1-7 micrometers) fibers. A preliminary estimate indicated that about 10-20% of the unmyelinated fibers were sensory. The implications of these findings are discussed.
通过电子显微镜对猫左侧内脏大神经的纤维组成进行了研究。对腹侧神经根切断术（T3-L1）或脊神经切断术（T3-L1）后正常和部分变性的神经标本进行了比较。正常的内脏大神经含有2500-4000条有髓纤维和10000-15000条无髓纤维。节前纤维包括约90%的细有髓纤维（1-7微米）和超过50%的无髓纤维。通过脊神经切断术去除感觉和节前成分后，发现了第三类节后纤维。这包括13-38条小的有髓纤维（1-5微米）和1645-7619条无髓纤维。最后，对两组（腹侧神经根切断术和脊神经切断术）正常和部分变性的神经标本进行比较表明，内脏传入神经几乎由所有120-350条大的有髓纤维（8-14微米）和10%的小的有髓纤维（1-7微米）组成。初步估计表明，约10-20%的无髓纤维是感觉性的。讨论了这些发现的意义。
