 Berridge has helped identify "hedonic hotspots" in the brain, such as the nucleus accumbens and ventral pallidum, where opioid, endocannabinoid, and GABA neurotransmission coordinate the “liking” of tastes.Berridge postulates that these hedonic hotspots may be crucial for how the brain produces the hedonic pleasurable feelings common to delicious food, sex, drugs, and other rewards (a role previously thought to be played mostly by brain dopamine systems).Berridge and colleague Dr. Terry Robinson have formulated a contemporary theory of addiction called the Incentive Sensitization Theory of Addiction.