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snr [2017/09/27 22:54] (current)
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 +====== SNr - Substantia Nigra, pars reticulata: ======
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 +The SNr is now known to be histologically very similar to the Globus Pallidus, internal segment (GPi) and, like the GPi, is a major output nucleus of the basal ganglia (BG). And, also like GPi, it is made up almost exclusively of tonically active projecting GABAergic cells. ​ As such, SNr provides tonic inhibition of thalamic relay cells (TRCs) which can be disinhibited by BG gating signals. ​ SNr also projects to the superior colliculus (SC) where it also provides tonic inhibition.
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