Brain Wave Modulation
Some smart drug proponents profess that they promote brain wave modulation. The brain produces patterns of neuronal activity when we do different tasks. Scientists are aware of four distinct categories ranging from most to least activity. Brain wave modulation attempts to manipulate and fine-tune these frequencies (via Scientific American).
This is a controversial topic because many experts decry this and say there’s no evidence to validate this yet. Many also believe that meditation and other holistic practices are as effective as using nootropics for this purpose. Only time will tell if smart drugs can aid brain wave modulation.