cursor control

Cursor control is moving a pointer on a screen using brain signals alone — no hand, no mouse. It is the classic demonstration of a brain–computer interface, the experiment everyone reaches for first, because a moving dot is easy to measure and easy to understand.

The idea is simple even if the engineering is not. A person imagines or attempts a movement, the system reads the matching pattern in the brain, and that pattern is mapped onto the cursor's direction and speed. Researchers measure progress by how fast and how accurately the dot reaches its target, in one, two, or three dimensions.

What looks like a toy is actually a lifeline. For someone who is paralyzed and cannot speak, steering a cursor to point and click is a way to type, browse, and reconnect with the world — which is why cursor control remains both a benchmark and a real application.