Posterior α activity is not phase-reset by visual stimuli Export

@article{citeulike:3149366, abstract = {10.1073/pnas.0505785103 There is currently a debate as to whether event-related potentials and fields measured by using electroencephalography or magnetoencephalography are generated by ongoing oscillatory activity becoming phase-reset in response to a given stimulus. We performed a magnetoencephalography study measuring brain activity in response to visual stimuli. Using a measure termed the phase-preservation index we investigated the phase of oscillatory α activity (8–13 Hz) before and after the stimulus. We found that in single trials the α oscillations after visual stimuli preserve their phase relationship with respect to the phase before the stimuli. This finding argues against phase-resetting of ongoing oscillations as being responsible for visually evoked responses. The event-related field can be explained primarily by stimulus-locked activity in the θ band that is absent before the stimulus. These findings suggest that different neuronal events are responsible for generating the ongoing oscillations and the visually evoked responses.}, author = {Mazaheri, Ali and Jensen, Ole}, citeulike-article-id = {3149366}, citeulike-linkout-0 = {http://dx.doi.org/10.1073/pnas.0505785103}, citeulike-linkout-1 = {http://www.pnas.org/content/103/8/2948.abstract}, citeulike-linkout-2 = {http://www.pnas.org/content/103/8/2948.full.pdf}, citeulike-linkout-3 = {http://view.ncbi.nlm.nih.gov/pubmed/16473952}, citeulike-linkout-4 = {http://www.hubmed.org/display.cgi?uids=16473952}, doi = {10.1073/pnas.0505785103}, journal = {Proceedings of the National Academy of Sciences of the United States of America}, keywords = {alpha, coherence, eeg, erf, erp, human, meg, oscillation, timefreq\_methods, vision}, month = {February}, number = {8}, pages = {2948--2952}, posted-at = {2008-09-23 18:36:55}, priority = {2}, title = {Posterior α activity is not phase-reset by visual stimuli}, url = {http://dx.doi.org/10.1073/pnas.0505785103}, volume = {103}, year = {2006} }

TY - JOUR ID - citeulike:3149366 L3 - citeulike-article-id:3149366 N2 - 10.1073/pnas.0505785103 There is currently a debate as to whether event-related potentials and fields measured by using electroencephalography or magnetoencephalography are generated by ongoing oscillatory activity becoming phase-reset in response to a given stimulus. We performed a magnetoencephalography study measuring brain activity in response to visual stimuli. Using a measure termed the phase-preservation index we investigated the phase of oscillatory α activity (8–13 Hz) before and after the stimulus. We found that in single trials the α oscillations after visual stimuli preserve their phase relationship with respect to the phase before the stimuli. This finding argues against phase-resetting of ongoing oscillations as being responsible for visually evoked responses. The event-related field can be explained primarily by stimulus-locked activity in the θ band that is absent before the stimulus. These findings suggest that different neuronal events are responsible for generating the ongoing oscillations and the visually evoked responses. IS - 8 JF - Proceedings of the National Academy of Sciences of the United States of America EP - 2952 TI - Posterior α activity is not phase-reset by visual stimuli VL - 103 SP - 2948 KW - alpha KW - coherence KW - eeg KW - erf KW - erp KW - human KW - meg KW - oscillation KW - timefreq_methods KW - vision AU - Mazaheri, Ali AU - Jensen, Ole PY - 2006/02/21/ UR - http://dx.doi.org/10.1073/pnas.0505785103 ER -