pars compacta
noun
pars com·pac·ta
-käm-ˈpak-tə 
: the large dorsal part of gray matter of the substantia nigra that is next to the tegmentum
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“Pars compacta.” Merriam-Webster.com Medical Dictionary, Merriam-Webster, https://www.merriam-webster.com/medical/pars%20compacta. Accessed 3 Jul. 2025.
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