Which brain region is primarily involved in the descending pain modulatory pathway, and how do opioids influence this area to reduce pain?

The rostral ventromedial medulla (RVM) is a key brain region primarily involved in the descending pain modulatory pathway. The descending pain modulatory pathway is a network of brain structures that can either enhance or inhibit pain signals ascending from the spinal cord to the brain. The RVM, located in the brainstem, receives input from several other brain regions, including the periaqueductal gray....