TY - CHAP T1 - Near-Instantaneous Classification of Perceptual States from Cortical Surface Recordings T2 - Brain-Computer Interface Research: A State-of-the-Art Summary Y1 - 2015 A1 - Miller, Kai J A1 - Gerwin Schalk A1 - Hermes, Dora A1 - Ojemann, Jeffrey G A1 - Rao, Rajesh P N KW - broadband power KW - Electrocorticography KW - event-related potential KW - fusiform cortex KW - human vision AB - Human visual processing is of such complexity that, despite decades of focused research, many basic questions remain unanswered. Although we know that the inferotemporal cortex is a key region in object recognition, we don’t fully understand its physiologic role in brain function, nor do we have the full set of tools to explore this question. Here we show that electrical potentials from the surface of the human brain contain enough information to decode a subject’s perceptual state accurately, and with fine temporal precision. Electrocorticographic (ECoG) arrays were placed over the inferotemporal cortical areas of seven subjects. Pictures of faces and houses were quickly presented while each subject performed a simple visual task. Results showed that two well-known types of brain signals—event-averaged broadband power and event-averaged raw potential—can independently or together be used to classify the presented image. When applied to continuously recorded brain activity, our decoding technique could accurately predict whether each stimulus was a face, house, or neither, with  20 ms timing error. These results provide a roadmap for improved brain-computer interfacing tools to help neurosurgeons, research scientists, engineers, and, ultimately, patients. JF - Brain-Computer Interface Research: A State-of-the-Art Summary PB - Springer International Publishing CY - New York City, NY SN - 978-3-319-25188-2 UR - http://link.springer.com/chapter/10.1007/978-3-319-25190-5_10 ER - TY - JOUR T1 - Proceedings of the Fifth International Workshop on Advances in Electrocorticography. JF - Epilepsy Behav Y1 - 2014 A1 - A L Ritaccio A1 - Peter Brunner A1 - Gunduz, Aysegul A1 - Hermes, Dora A1 - Hirsch, Lawrence J A1 - Jacobs, Joshua A1 - Kamada, Kyousuke A1 - Kastner, Sabine A1 - Robert T. Knight A1 - Lesser, Ronald P A1 - Miller, Kai A1 - Sejnowski, Terrence A1 - Worrell, Gregory A1 - Gerwin Schalk KW - Brain Mapping KW - brain-computer interface KW - electrical stimulation mapping KW - Electrocorticography KW - functional mapping KW - Gamma-frequency electroencephalography KW - High-frequency oscillations KW - Neuroprosthetics KW - Seizure detection KW - Subdural grid AB -

The Fifth International Workshop on Advances in Electrocorticography convened in San Diego, CA, on November 7-8, 2013. Advancements in methodology, implementation, and commercialization across both research and in the interval year since the last workshop were the focus of the gathering. Electrocorticography (ECoG) is now firmly established as a preferred signal source for advanced research in functional, cognitive, and neuroprosthetic domains. Published output in ECoG fields has increased tenfold in the past decade. These proceedings attempt to summarize the state of the art.

VL - 41 UR - http://www.ncbi.nlm.nih.gov/pubmed/25461213 ER -