Macroanatomic Structure of Spinal Nerves Forming the Plexus Lumbosacralis in the Merlin (Falco columbarius)

In this study, in five adut Merlin (Falco columbarius) it was aimed to identify the branches and innervation areas of spinal nerves that compose plexus lumbosacralis by dissecting under stereomicroscope. It was observed that plexus lumbosacralis was formed by six ramus ventralis of synsacral spinal nerves (2-7) located ventral to synsacrum. Plexus lumbalis was formed by ramus ventralis of 2-4 spinal nerves that settled at the cranioventral aspect of the ilium whereas ramus ventralis from 4th to 7th spinal nerves generated the plexus sacralis. Truncus cranialis and truncus medianus merged as a single root around the fossa renalis. Truncus caudalis further joined two truncus at the level of foramen ischiadicum to form n. ischiadicus