GPi

Their putative mammalian analogues are the projection neurons of the globus pallidus internus (GPi) and the substantia nigra pars reticulata (SNr). These neurons are tonically active with high firing rates and are basal ganglia output neurons. In our dataset, these cells have large somata, large axonal boutons, and thick, myelinated axon branches that exit the dataset. This indicates that they are indeed the neurons that project outside of Area X, accounting for 0.5% of adult neurons.

putative neurotransmitter: GABA

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