October 12, 2007
Brain-computer interface is used in Second Life online virtual world
With the brain-computer interface (BCI), technology has empowered humans to mentally control computers. Up till now no one thought of exploiting this technology in concurrence with the Second Life online virtual world. A research team led by professor Jun’ichi Ushiba of the Keio University Biomedical Engineering Laboratory has developed a BCI system that lets the user walk an avatar through the streets of Second Life depending exclusively on the power of thought. To control the avatar on screen, the user simply thinks about moving various body parts. The avatar walks forward when the user thinks about moving his/her own feet, and it turns right and left when the user imagines moving his/her right and left arms. The system consists of a headpiece equipped with electrodes that monitor activity in three areas of the motor cortex (the region of the brain involved in controlling the movement of the arms and legs). An EEG machine reads and graphs the data and relays it to the BCI, where a brain wave analysis algorithm interprets the user’s imagined movements. A keyboard emulator then converts this data into a signal and relays it to Second Life, causing the on-screen avatar to move. Hence, the user can exercise real-time control over the avatar in the 3D virtual world without budging an inch.
The researchers are planning on expanding the applications of BCI so that users can make Second Life avatars perform more complex movements and gestures. Hey also hope that the mind-controlled avatar, (which was created through a joint medical engineering project involving Keio’s Department of Rehabilitation Medicine and the Tsukigase Rehabilitation Center), will one day help people with serious physical impairments communicate and do business in Second Life.