EEG oscillations and recognition memory: theta correlates of memory retrieval and decision making.
Studies of memory retrieval have identified electroencephalographic (EEG) correlates of a test item's old-new status, reaction time, and memory load. In the current study, we used a multivariate analysis to disentangle the effects of these correlated variables. During retrieval, power of left-parietal theta (4-8 Hz) oscillations increased in proportion to how well a test item was remembered, and theta in central regions correlated with decision making. We also studied how these oscillatory dynamics complemented event-related potentials. These findings are the first to demonstrate that distinct patterns of theta oscillations can simultaneously relate to different aspects of behavior.
Jacobs
Joshua
J
Neuroscience Graduate Group, University of Pennsylvania, Philadelphia, PA 19104, USA.
Hwang
Grace
G
Curran
Tim
T
Kahana
Michael J
MJ
D000328:Adult; D001288:Attention / Q000502:physiology; D001931:Brain Mapping; D002540:Cerebral Cortex / Q000502:physiology*; D003657:Decision Making / Q000502:physiology*; D004569:Electroencephalography; D005071:Evoked Potentials / Q000502:physiology; D005260:Female; D006801:Humans; D016014:Linear Models; D008297:Male; D008570:Memory, Short-Term / Q000502:physiology; D011939:Mental Recall / Q000502:physiology*; D009991:Oscillometry; D010364:Pattern Recognition, Visual / Q000502:physiology; D011930:Reaction Time / Q000502:physiology; D011932:Reading; D012691:Serial Learning / Q000502:physiology; D012815:Signal Processing, Computer-Assisted; D013223:Statistics as Topic; D013826:Theta Rhythm; D014706:Verbal Learning / Q000502:physiology*