Distribution pattern of pudendal nerve plexus for the phallus retractor muscles in the cock.
Two paired retractor muscles, m. retractor phalli cranialis (MRPCr) and m. retractor phalli caudalis (MRPCa) exist as the intrinsic cloacal muscles of the chicken. Pudendal plexus was formed by the ventral rami of roots 30-34. Pudendal nerve (PN) and the intermediated caudal nerve (ICN) were composed of twigs from roots 30-33 and roots 30-34, respectively. Two or three rootlets participated in the PN; its third one originated from the root 33 which is the first root of caudal trunk in pudendal plexus. The non-striated MRPCr was innervated by the PN, whereas the striated MRPCa by the ICN.
Ohsawa
K
K
Department of Veterinary Anatomy, Faculty of Agriculture, University of Tokyo, Japan.
Nishida
T
T
Kurohmaru
M
M
Hayashi
Y
Y
D000818:Animals; D002645:Chickens / Q000033:anatomy & histology*; D002988:Cloaca / Q000294:innervation*; D008297:Male; D009132:Muscles / Q000294:innervation*; D013126:Spinal Nerve Roots / Q000033:anatomy & histology*