Brain oscillatory 4-30 Hz responses during a visual n-back memory task with varying memory load. Export

@article{citeulike:1090253, abstract = {Brain oscillatory responses of 4-30 Hz EEG frequencies elicited during the performance of a visual n-back task were examined in 36 adult volunteers. Event-related desynchronization (ERD) and event-related synchronization (ERS) responses were examined separately for targets and non-targets in four different memory load conditions (0-, 1-, 2- and 3-back). The presentation of all stimuli in all memory load conditions elicited long-lasting theta frequency (\~{}4-6 Hz) ERS responses which were of greater magnitude for the target stimuli as compared to the non-target stimuli. Alpha frequency range (\~{}8-12 Hz) ERD responses were observed in all memory load conditions for both targets and non-targets. The duration of these alpha ERD responses increased with increasing memory load and reaction time. In all memory load conditions, early appearing beta rhythm (\~{}14-30 Hz) ERD responses were elicited, and with increasing memory load, these beta ERD responses became longer in duration. Additionally, beta ERS responses were observed in the 0- and 1-back memory load conditions. The current results reveal a complex interplay between brain oscillations at different frequencies during a cognitive task performance.}, address = {Cognitive Science Unit, Department of Psychology, University of Helsinki, P.O. Box 9, 00014 Helsinki, Finland.}, author = {Pesonen, Mirka and H\"{a}m\"{a}l\"{a}inen, Heikki and Krause, Christina M M.}, citeulike-article-id = {1090253}, citeulike-linkout-0 = {http://dx.doi.org/10.1016/j.brainres.2006.12.076}, citeulike-linkout-1 = {http://view.ncbi.nlm.nih.gov/pubmed/17270151}, citeulike-linkout-2 = {http://www.hubmed.org/display.cgi?uids=17270151}, day = {4}, doi = {10.1016/j.brainres.2006.12.076}, issn = {0006-8993}, journal = {Brain Res}, keywords = {biological-rhythms, cog-neuro, eeg-components, learning-and-memory, neuro-coding, neuro-computation, neuro-sync, time-course, time-dynamics}, month = {January}, posted-at = {2008-01-17 21:19:48}, priority = {3}, title = {Brain oscillatory 4-30 Hz responses during a visual n-back memory task with varying memory load.}, url = {http://dx.doi.org/10.1016/j.brainres.2006.12.076}, year = {2007} }

TY - JOUR ID - citeulike:1090253 L3 - citeulike-article-id:1090253 N2 - Brain oscillatory responses of 4-30 Hz EEG frequencies elicited during the performance of a visual n-back task were examined in 36 adult volunteers. Event-related desynchronization (ERD) and event-related synchronization (ERS) responses were examined separately for targets and non-targets in four different memory load conditions (0-, 1-, 2- and 3-back). The presentation of all stimuli in all memory load conditions elicited long-lasting theta frequency (~4-6 Hz) ERS responses which were of greater magnitude for the target stimuli as compared to the non-target stimuli. Alpha frequency range (~8-12 Hz) ERD responses were observed in all memory load conditions for both targets and non-targets. The duration of these alpha ERD responses increased with increasing memory load and reaction time. In all memory load conditions, early appearing beta rhythm (~14-30 Hz) ERD responses were elicited, and with increasing memory load, these beta ERD responses became longer in duration. Additionally, beta ERS responses were observed in the 0- and 1-back memory load conditions. The current results reveal a complex interplay between brain oscillations at different frequencies during a cognitive task performance. JF - Brain Res SN - 0006-8993 AD - Cognitive Science Unit, Department of Psychology, University of Helsinki, P.O. Box 9, 00014 Helsinki, Finland. TI - Brain oscillatory 4-30 Hz responses during a visual n-back memory task with varying memory load. KW - biological-rhythms KW - cog-neuro KW - eeg-components KW - learning-and-memory KW - neuro-coding KW - neuro-computation KW - neuro-sync KW - time-course KW - time-dynamics AU - Pesonen, Mirka AU - Hämäläinen, Heikki AU - Krause, Christina M PY - 2007/01/04/ UR - http://dx.doi.org/10.1016/j.brainres.2006.12.076 ER -