Kikuchi T
Hokkaido Igaku Zasshi. 1987 Jan;62(1):96-107.
Using dogs, cats, rabbits, guinea pigs and rats, the nerves to the Levator ani, the Coccygeus, the Obturator internus and the Quadratus femoris are observed and compared macroscopically. The main findings obtained are summarized as follows: The nerve to the Levator ani of dogs is one (95.0%) or two (5.0%) in number and arises most frequently from S2 and S3. That of rats is one in number and arises most frequently from S minus 1 (S-1) and S1. The nerve to the Coccygeus of dogs is one (70.0%) or two (30.0%) in number and arises most frequently from S2 and S3. That of rabbits is one (65.9%), two (24.4%) or three (9.7%) in number and arises most frequently from S2 and S3. The nerve to the Levator ani is observed in dogs and rats, but it is not observed in rabbits. The common trunk which is formed by the nerves to the pelvic floor muscles and the pelvic splanchnic nerves is observed in dogs and rats, but it is not observed in rabbits. The number of the nerves to the Obturator internus of dogs, cats and rabbits is either one or two. That of guinea pigs and rats is one. The number of the nerves to the Quadratus femoris of cats and guinea pigs is one. The common trunk which is formed by the originating root of the nerve to the Obturator internus and that of the nerve to the Quadratus femoris is observed in guinea pigs, but it is not observed in cats. The new classification in proposed according to the arising position of the nerve to the Obturator internus and the Quadratus femoris and classified into the following types: Type 1 (sciatic nerve type); the nerve arises from the main trunk of the sciatic nerve or it's originating root. Type 2 (transitional type); the nerve arises from the point where the bigeminal nerve joins the sciatic nerve. Type 3 (pudendal nerve type); the nerve arises from the pudendal nerve or it's originating root. The types most frequently observed are as follows; In dogs, cats, rabbits and rats the nerve to the Obturator internus is pudendal nerve type, and in guinea pigs it is transitional type. In cats the nerve to the Quadratus femoris is pudendal nerve type, and in guinea pigs it is transitional type.
使用狗、猫、兔子、豚鼠和大鼠，对肛提肌、尾骨肌、闭孔内肌和股方肌的神经进行宏观观察和比较。获得的主要发现总结如下：狗的肛提肌神经数量为1条（95.0%）或2条（5.0%），最常起源于S2和S3。大鼠的肛提肌神经数量为1条，最常起源于S-1和S1。狗的尾骨肌神经数量为1条（70.0%）或2条（30.0%），最常起源于S2和S3。兔子的尾骨肌神经数量为1条（65.9%）、2条（24.4%）或3条（9.7%），最常起源于S2和S3。在狗和大鼠中观察到了肛提肌神经，但在兔子中未观察到。在狗和大鼠中观察到了由盆底肌肉神经和盆内脏神经形成的共同干，但在兔子中未观察到。狗、猫和兔子的闭孔内肌神经数量为1条或2条。豚鼠和大鼠的闭孔内肌神经数量为1条。猫和豚鼠的股方肌神经数量为1条。在豚鼠中观察到了由闭孔内肌神经的起始根和股方肌神经的起始根形成的共同干，但在猫中未观察到。根据闭孔内肌神经和股方肌神经的起始位置提出了新的分类，分为以下类型：1型（坐骨神经型）；神经起源于坐骨神经主干或其起始根。2型（过渡型）；神经起源于二腹肌神经与坐骨神经相连处。3型（阴部神经型）；神经起源于阴部神经或其起始根。最常观察到的类型如下：在狗、猫、兔子和大鼠中，闭孔内肌神经为阴部神经型，在豚鼠中为过渡型。在猫中，股方肌神经为阴部神经型，在豚鼠中为过渡型。
