Decoupling the Cortical Power Spectrum Reveals Real-Time Representation of Individual Finger Movements in Humans Export

@article{citeulike:4169769, abstract = {During active movement the electric potentials measured from the surface of the motor cortex exhibit consistent modulation, revealing two distinguishable processes in the power spectrum. At frequencies <40 Hz, narrow-band power decreases occur with movement over widely distributed cortical areas, while at higher frequencies there are spatially more focal power increases. These high-frequency changes have commonly been assumed to reflect synchronous rhythms, analogous to lower-frequency phenomena, but it has recently been proposed that they reflect a broad-band spectral change across the entire spectrum, which could be obscured by synchronous rhythms at low frequencies. In 10 human subjects performing a finger movement task, we demonstrate that a principal component type of decomposition can naively separate low-frequency narrow-band rhythms from an asynchronous, broad-spectral, change at all frequencies between 5 and 200 Hz. This broad-spectral change exhibited spatially discrete representation for individual fingers and reproduced the temporal movement trajectories of different individual fingers. 10.1523/JNEUROSCI.5506-08.2009}, author = {Miller, K. J. and Zanos, S. and Fetz, E. E. and den Nijs, M. and Ojemann, J. G.}, citeulike-article-id = {4169769}, citeulike-linkout-0 = {http://dx.doi.org/10.1523/JNEUROSCI.5506-08.2009}, citeulike-linkout-1 = {http://www.jneurosci.org/content/29/10/3132.abstract}, citeulike-linkout-2 = {http://www.jneurosci.org/content/29/10/3132.full.pdf}, citeulike-linkout-3 = {http://www.jneurosci.org/cgi/content/abstract/29/10/3132}, citeulike-linkout-4 = {http://view.ncbi.nlm.nih.gov/pubmed/19279250}, citeulike-linkout-5 = {http://www.hubmed.org/display.cgi?uids=19279250}, day = {11}, doi = {10.1523/JNEUROSCI.5506-08.2009}, journal = {J. Neurosci.}, keywords = {decoding, eeg}, month = {March}, number = {10}, pages = {3132--3137}, posted-at = {2009-10-28 12:03:04}, priority = {2}, title = {Decoupling the Cortical Power Spectrum Reveals Real-Time Representation of Individual Finger Movements in Humans}, url = {http://dx.doi.org/10.1523/JNEUROSCI.5506-08.2009}, volume = {29}, year = {2009} }

TY - JOUR ID - citeulike:4169769 L3 - citeulike-article-id:4169769 N2 - During active movement the electric potentials measured from the surface of the motor cortex exhibit consistent modulation, revealing two distinguishable processes in the power spectrum. At frequencies <40 Hz, narrow-band power decreases occur with movement over widely distributed cortical areas, while at higher frequencies there are spatially more focal power increases. These high-frequency changes have commonly been assumed to reflect synchronous rhythms, analogous to lower-frequency phenomena, but it has recently been proposed that they reflect a broad-band spectral change across the entire spectrum, which could be obscured by synchronous rhythms at low frequencies. In 10 human subjects performing a finger movement task, we demonstrate that a principal component type of decomposition can naively separate low-frequency narrow-band rhythms from an asynchronous, broad-spectral, change at all frequencies between 5 and 200 Hz. This broad-spectral change exhibited spatially discrete representation for individual fingers and reproduced the temporal movement trajectories of different individual fingers. 10.1523/JNEUROSCI.5506-08.2009 IS - 10 JF - J. Neurosci. EP - 3137 TI - Decoupling the Cortical Power Spectrum Reveals Real-Time Representation of Individual Finger Movements in Humans VL - 29 SP - 3132 KW - decoding KW - eeg AU - Miller, KJ AU - Zanos, S AU - Fetz, EE AU - den Nijs, M AU - Ojemann, JG PY - 2009/03/11/ UR - http://dx.doi.org/10.1523/JNEUROSCI.5506-08.2009 ER -