Nucleus raphe magnus

The nucleus raphe magnus (called the nucleus raphes magnus by Terminologia Anatomica and some scientific publications), is located directly rostral to the nucleus raphe obscurus, and receives input from the spinal cord and cerebellum.

This makes the nucleus raphe magnus a likely candidate for part of the motor system; however, it seems to participate in the endogenous analgesia system. Mounting evidence suggests that the nucleus raphe magnus plays an important role in homeostatic regulation.