Thought Translation Device

Abstract The Thought Translation Device (TTD) is a Brain Computer-Interface (BCI) which successfully enabled totally paralyzed patients to communicate by using their brain potentials only. TTD consists of a training device and spelling program for the completely paralyzed using Slow Cortical brain Potentials (SCP). During the training phase, self-regulation of SCPs is learn through visual-auditory feedback and positive reinforcement of SCPs. During the spelling phase, patients select letters or words with their SCPs. A psychophysiological system for detection of cognitive functioning in completely paralyzed patients is an integral part of the TTD. In its present form, the core of the TTD consists of a single computer program that runs under all MS-Windows versions. This software contains the functions of EEG-acquisition, storage, signal processing, classification, and various application such as spelling.