Stimulation of which brain area can modulate the sensation of pain?

Endogenous analgesic system   periaqueductal gray (PAG)-projects to nucleus raphé magnus and rostral ventromedial medulla   project to the dorsal horn of the spinal cord- release serotonin and norepinephrine   Locus coerulus-Nor epinephrine   Stress induced analgesia:   release of endogenous cannabinoids such as 2-arachidonoylglycerol (2AG) and anandamide acts on CB1(Euphoria) and CB 2 (Pain)receptors