A Microsaccadic Rhythm Modulates Gamma-Band Synchronization and Behavior Export

@article{citeulike:5300419, abstract = {Rhythms occur both in neuronal activity and in behavior. Behavioral rhythms abound at frequencies at or below 10 Hz. Neuronal rhythms cover a very wide frequency range, and the phase of neuronal low-frequency rhythms often rhythmically modulates the strength of higher-frequency rhythms, particularly of gamma-band synchronization (GBS). Here, we study stimulus-induced GBS in awake monkey areas V1 and V4 in relation to a specific form of spontaneous behavior, namely microsaccades (MSs), small fixational eye movements. We found that MSs occur rhythmically at a frequency of [\~{}]3.3 Hz. The rhythmic MSs were predicted by the phase of the 3.3 Hz rhythm in V1 and V4 local field potentials. In turn, the MSs modulated both visually induced GBS and the speed of visually triggered behavioral responses. Fast/slow responses were preceded by a specific temporal pattern of MSs. These MS patterns induced perturbations in GBS that in turn explained variability in behavioral response speed. We hypothesize that the 3.3 Hz rhythm structures the sampling and exploration of the environment through building and breaking neuronal ensembles synchronized in the gamma-frequency band to process sensory stimuli. 10.1523/JNEUROSCI.1193-09.2009}, author = {Bosman, Conrado A. and Womelsdorf, Thilo and Desimone, Robert and Fries, Pascal}, citeulike-article-id = {5300419}, citeulike-linkout-0 = {http://dx.doi.org/10.1523/JNEUROSCI.1193-09.2009}, citeulike-linkout-1 = {http://www.jneurosci.org/cgi/content/abstract/29/30/9471}, citeulike-linkout-2 = {http://view.ncbi.nlm.nih.gov/pubmed/19641110}, citeulike-linkout-3 = {http://www.hubmed.org/display.cgi?uids=19641110}, day = {29}, doi = {10.1523/JNEUROSCI.1193-09.2009}, issn = {1529-2401}, journal = {J. Neurosci.}, keywords = {eye-movement, gamma, vision}, month = {July}, number = {30}, pages = {9471--9480}, posted-at = {2009-08-05 08:20:57}, priority = {2}, title = {A Microsaccadic Rhythm Modulates Gamma-Band Synchronization and Behavior}, url = {http://dx.doi.org/10.1523/JNEUROSCI.1193-09.2009}, volume = {29}, year = {2009} }

TY - JOUR ID - citeulike:5300419 L3 - citeulike-article-id:5300419 N2 - Rhythms occur both in neuronal activity and in behavior. Behavioral rhythms abound at frequencies at or below 10 Hz. Neuronal rhythms cover a very wide frequency range, and the phase of neuronal low-frequency rhythms often rhythmically modulates the strength of higher-frequency rhythms, particularly of gamma-band synchronization (GBS). Here, we study stimulus-induced GBS in awake monkey areas V1 and V4 in relation to a specific form of spontaneous behavior, namely microsaccades (MSs), small fixational eye movements. We found that MSs occur rhythmically at a frequency of [~]3.3 Hz. The rhythmic MSs were predicted by the phase of the 3.3 Hz rhythm in V1 and V4 local field potentials. In turn, the MSs modulated both visually induced GBS and the speed of visually triggered behavioral responses. Fast/slow responses were preceded by a specific temporal pattern of MSs. These MS patterns induced perturbations in GBS that in turn explained variability in behavioral response speed. We hypothesize that the 3.3 Hz rhythm structures the sampling and exploration of the environment through building and breaking neuronal ensembles synchronized in the gamma-frequency band to process sensory stimuli. 10.1523/JNEUROSCI.1193-09.2009 IS - 30 JF - J. Neurosci. SN - 1529-2401 EP - 9480 TI - A Microsaccadic Rhythm Modulates Gamma-Band Synchronization and Behavior VL - 29 SP - 9471 KW - eye-movement KW - gamma KW - vision AU - Bosman, Conrado AU - Womelsdorf, Thilo AU - Desimone, Robert AU - Fries, Pascal PY - 2009/07/29/ UR - http://dx.doi.org/10.1523/JNEUROSCI.1193-09.2009 ER -