RAMUS By N., Pam M.S. - April 28, 2013 Any of the large branches of a spinal nerve emerging from the spine. These are responsible for distributing motor and sensory nerve fibers to other, smaller nerves. RAMUS: "The Ramus somehow escaped injury in the accident." Related Psychology Terms PUDENDAL NERVE VAGUS NERVE TRIGEMINAL NERVE RADIAL NERVE ULNAR NERVE VENTRAL ROOT PERIPHERAL NERVOUS SYSTEM (PNS) TRIGEMINAL NUCLEUS WHITE COMMISSURE RAMI COMMUNICANTES Cite this page: N., Pam M.S., "RAMUS," in PsychologyDictionary.org, April 28, 2013, https://psychologydictionary.org/ramus/ (accessed November 13, 2019).