Sex is a primary reward and it is the basis of pair-bond formation in voles. The striatum is part of the neuronal circuitry underlying a remarkable pair-bond formation in which both partners remain monogamous. It is important to note that the role of the striatum extends beyond that of movement and reward.
in human nervous system: The spinal cord. Associated with local regions of the spinal cord and imposing on it an external segmentation are 31 pairs of spinal nerves, each of which receives and furnishes one dorsal and one ventral root.
Eight pairs of spinal nerves are located in the uppermost, cervical region of the cord: Twelve pairs are found in the thoracic region. Five pairs are in the lumbar area. Five pairs are in the sacral area. One pair is found in the most inferior, coccygeal region. Function These second order lower motor neurons, the spinal nerves, form part of the final common pathway for information traveling from the central nervous system to the periphery.