猪的胸,腰和荐段交感神经交通支的观察

本研究解剖了5头3月龄猪尸体交感神经的交通支。在胸1～14,腰1～3节段每一脊神经都有二条交通支;腰4～6,荐1～4节段各只有一条交通支;仅在腰2～3节段,有斜交通支;荐段有横交通支。在胸、腰段二交通支,多数取前后位置,仅少数只分深浅。前支或深支细,与脊神经的连接点距椎弓孔或椎间孔较近;后支或浅支较粗,与脊神经的连接点距椎弓孔或椎间孔较远。胸、腰段交通支的分支类型与马和驴的交通支相似。

THE RAMI COMMUNICANTES OF THE SYMPATHETIC SYSTEM IN THE THORACO-LUMBAR AND SACRAL PARTS OF PIG

The rami communicantes of the sympathetic system in the thoraco-lumbar and sacral parts were studied on five pigs. Each of spinal N. has two rami communicantes from T1 to Tl4 and from L1 to L3. Either the section of L4-6 and S1-4 has only one ramus communicantis and there is only an obliguus ramus between L2 and L3. There are several rami transversos communicantes in sacral section. There are two rami communicantes in thoraco-lumbar part. In general, they are classified as ramus ventrales and ramus posterior and they sometimes are called ramus profundus and ramus superficialiais respectively. The distance between the point at which the ramus ventrales or ramus profundus with the spinal N. and the intervertebral foramen is shorter than the ramus posterior or ramus superficialis, and the ramus ventrales or the ramus profundus is small than the ramus posterior or ramus superficialis.Pig, horse and donkey are similar in the class of the rami communicantes in thoraco-lumbar part.T = Thoracic L= Lumbar S = Sacral