Original Setting:Magical Girl ☆Sym-Tan☆/Extra/Technology/Nano-NeuroFoam

From Worm CYOA Wiki

Nano-NeuroFoam

Implanted within the skull and spine, these nano-machines envelop the entire brain, establishing a vital connection to a Neuron-to-Machine buffer and security system. Powered by Beta-cells and Blood flow pumps, this intricate apparatus functions as a Personal Computer. It features a MUSE (Mind-User System Experience), a sophisticated personal Virtual Intelligence (V.I.) based on comprehensive Neuron/Mind readings. Additionally, it includes a slot to connect "lenses," which are snapshots of neuron matter specialized in various fields of knowledge.