A Role of Beta Oscillatory Synchrony in Biasing Response Competition? Export

@article{citeulike:3441425, abstract = {Beta-range oscillatory activity measured over the motor cortex and beta synchrony between cortex and spinal cord can be up- or downregulated in anticipation of a postural challenge or the initiation of movement. Based on these properties of beta activity in the preparation for future events, the present investigation addressed whether simultaneous up- and downregulation of beta activity might act as an online mechanism to suppress and select competing responses. Measures of local and long-range beta synchrony were obtained from electroencephalographic and electromyographic signals recorded during a cued choice reaction task. Analyses focused on task-related changes in beta synchrony during a 2-s delay period between cue and response signal. Analyzed separately, none of the beta measures (spectral power, corticospinal coherence, corticospinal phase synchronization) showed simultaneous up- and downregulation over opposite hemispheres controlling the competing responses. However, the combined pattern of beta measures showed beta power desynchronization associated with selection of a response and increased corticospinal coherence and phase synchronization associated with suppression of a response. These results indicate that concurrent up- and downregulation of different components of beta oscillatory activity is likely to have a functional role in response selection, resembling attentional modulation of alpha activity in visual selection. 10.1093/cercor/bhn174}, author = {van Wijk, B. C. M. and Daffertshofer, A. and Roach, N. and Praamstra, P.}, citeulike-article-id = {3441425}, citeulike-linkout-0 = {http://dx.doi.org/10.1093/cercor/bhn174}, citeulike-linkout-1 = {http://cercor.oxfordjournals.org/cgi/content/abstract/19/6/1294?rss=1}, citeulike-linkout-2 = {http://view.ncbi.nlm.nih.gov/pubmed/18836098}, citeulike-linkout-3 = {http://www.hubmed.org/display.cgi?uids=18836098}, day = {3}, doi = {10.1093/cercor/bhn174}, journal = {Cereb. Cortex}, keywords = {coherence, corticospinal, eeg, emg, human, sensorimotor, synchrony}, month = {October}, pages = {bhn174+}, posted-at = {2008-10-22 22:56:56}, priority = {2}, title = {A Role of Beta Oscillatory Synchrony in Biasing Response Competition?}, url = {http://dx.doi.org/10.1093/cercor/bhn174}, year = {2008} }

TY - JOUR ID - citeulike:3441425 L3 - citeulike-article-id:3441425 N2 - Beta-range oscillatory activity measured over the motor cortex and beta synchrony between cortex and spinal cord can be up- or downregulated in anticipation of a postural challenge or the initiation of movement. Based on these properties of beta activity in the preparation for future events, the present investigation addressed whether simultaneous up- and downregulation of beta activity might act as an online mechanism to suppress and select competing responses. Measures of local and long-range beta synchrony were obtained from electroencephalographic and electromyographic signals recorded during a cued choice reaction task. Analyses focused on task-related changes in beta synchrony during a 2-s delay period between cue and response signal. Analyzed separately, none of the beta measures (spectral power, corticospinal coherence, corticospinal phase synchronization) showed simultaneous up- and downregulation over opposite hemispheres controlling the competing responses. However, the combined pattern of beta measures showed beta power desynchronization associated with selection of a response and increased corticospinal coherence and phase synchronization associated with suppression of a response. These results indicate that concurrent up- and downregulation of different components of beta oscillatory activity is likely to have a functional role in response selection, resembling attentional modulation of alpha activity in visual selection. 10.1093/cercor/bhn174 JF - Cereb. Cortex TI - A Role of Beta Oscillatory Synchrony in Biasing Response Competition? SP - bhn174 KW - coherence KW - corticospinal KW - eeg KW - emg KW - human KW - sensorimotor KW - synchrony AU - van Wijk, BCM AU - Daffertshofer, A AU - Roach, N AU - Praamstra, P PY - 2008/10/03/ UR - http://dx.doi.org/10.1093/cercor/bhn174 ER -