Custom-designed hardware rules.
DIY attempts at electrical brain stimulation to improve cognition are to get easier. Nature editorial.
He uses non-invasive stimulation to phase cancel the tremor. The stimulation mirrors but is opposite phase of the motor cortex oscillation. Reduces tremor by ~40% Brittain et al 2013
It was recently reported that low-voltage, non-invasive brain stimulation improves mathematical abilities. Does it? Here’s a cautionary discussion:
Does Brain Stimulation Make You Better at Maths?