There's this too, man. The claustrum is a thin cluster of compartments that is densely connected to many cortical regions and plays a role in numerous higher-level brain functions. Such brain functions are a combination of brain states influenced by the cholinergic basal forebrain, dopaminergic substantia nigra and neuromodulatory pathways from the ventral tegmental area and serotonergic raphe. [https://www.frontiersin.org/articles/10.3389/fncir.2021.658228/full](https://www.frontiersin.org/articles/10.3389/fncir.2021.658228/full)