The<unk>  (; IC, ISC, or IClj) are a group of neural granule cells located within the ventral striatum in the brains of most animals. This region of the brain is part of the limbic system, where it aids in the reinforcing effects of reward-like activities. Within most species, the<unk>  are specifically located within the olfactory tubercle; however, in primates, these<unk>  are located within the nucleus accumbens, the reward center of the brain, since the olfactory tubercle has practically disappeared in the brains of primates. Both of these structures have been implicated in the processing of incentives as well as addictions to drugs. Projections to and from the<unk>  supplement this knowledge with their involvement in the reward pathways for both cocaine and amphetamines.
Islands of Calleja
Watershed area 
Zeno of Cyprus
Trigger zone
Suboccipital triangle
Pretectal area
Occipital triangle
Collateral eminence