文摘
Sixteen distinct compartments were identified in the pigeon basal ganglia using multiple neurochemical markers. The pigeon striatum contains neurochemical regions comparable to the mammalian somatomotor, associational and limbic striatum. A neurochemically distinct area located in the medialmost striatum of pigeons appears to be unique to birds. The ventral striatum contains neurochemical regions similar to the mammalian accumbens core, shell, and rostral areas. Most compartments were highly conserved during tetrapod evolution, yet unique avian compartments have also evolved.