@article {3147, title = {Spectral dynamics of electroencephalographic activity during auditory information processing.}, journal = {Hearing research}, volume = {176}, year = {2003}, month = {02/2003}, pages = {25{\textendash}41}, abstract = {Dynamics of electroencephalographic (EEG) activity during auditory information processing were evaluated in response to changes in stimulus complexity, stimulus discriminability and attention using the oddball paradigm. In comparison to pre-stimulus baseline conditions, auditory stimulation synchronized EEG activity in delta, theta and alpha frequency bands. Event-related synchronization (ERS) effects were greatest at approximately 3 Hz (theta frequency band), and their magnitude depended on stimulus and task demands. Event-related desynchronization (ERD) of EEG activity was observed in the beta frequency band. This effect was greatest at approximately 21 Hz but occurred only for easily discriminable stimuli in attention-related target conditions. Because active discrimination tasks also required a button-press response with the right hand, ERDs involved more complex responses that may be related to a combination of perceptual, motor and cognitive processes. These results demonstrate that oddball and attention-related EEG responses to auditory stimulation could be characterized in the frequency domain. The specific design and analysis features described herein may prove useful since they provide a simple index of the brain{\textquoteright}s response to stimulation while at the same time provide powerful information not contained in typical time domain analysis.}, keywords = {Electroencephalography, event-related brain dynamics, event-related desynchronization, event-related synchronization, psychophysics, spectral analysis, time domain analysis}, issn = {0378-5955}, doi = {10.1016/S0378-5955(02)00715-3}, url = {http://www.ncbi.nlm.nih.gov/pubmed/12583879}, author = {Anthony T. Cacace and Dennis J. McFarland} }