TY - Generic T1 - Detection of spontaneous class-specific visual stimuli with high temporal accuracy in human electrocorticography. T2 - Conf Proc IEEE Eng Med Biol Soc Y1 - 2009 A1 - Miller, John W A1 - Hermes, Dora A1 - Gerwin Schalk A1 - Ramsey, Nick F A1 - Jagadeesh, Bharathi A1 - den Nijs, Marcel A1 - Ojemann, J G A1 - Rao, Rajesh P N KW - Algorithms KW - Electrocardiography KW - Evoked Potentials, Visual KW - Humans KW - Male KW - Pattern Recognition, Automated KW - Pattern Recognition, Visual KW - Photic Stimulation KW - Reproducibility of Results KW - Sensitivity and Specificity KW - User-Computer Interface KW - Visual Cortex AB - Most brain-computer interface classification experiments from electrical potential recordings have been focused on the identification of classes of stimuli or behavior where the timing of experimental parameters is known or pre-designated. Real world experience, however, is spontaneous, and to this end we describe an experiment predicting the occurrence, timing, and types of visual stimuli perceived by a human subject from electrocorticographic recordings. All 300 of 300 presented stimuli were correctly detected, with a temporal precision of order 20 ms. The type of stimulus (face/house) was correctly identified in 95% of these cases. There were approximately 20 false alarm events, corresponding to a late 2nd neuronal response to a previously identified event. JF - Conf Proc IEEE Eng Med Biol Soc VL - 2009 ER -