The globus pallidus (GP) is one of the components of the basal ganglia. It divides into globus pallidus internus (GPi) and globus pallidus externus (GPe). The globus pallidus and putamen collectively form the lentiform (lenticular) nucleus, which lies beneath the insula. The caudate nucleus and putamen form the corpus striatum. The corpus striatum is also an important part of the basal ganglia. The thalamus, subthalamus, and substantia nigra (SN) are not a part of the basal ganglia but serve essential functions for the network.
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