Cortical Low-Frequency Power and Progressive Phase Synchrony Precede Successful Memory Encoding

In this paper research the authors found that before a stimulus there is a synchronized oscillation between various cortical regions that cause the stimulus to be correctly memorized, the regions exhibit an increases in low-frequency oscillatory power that bound together through progressive low-frequency phase synchrony that involved the medial temporal lobe by the time of word presentation. This may reflect attentional mechanisms that optimize memory encoding.

" .. We found that, preceding successfully remembered word pairs, an orientation cue triggered a low-frequency 2– 4 Hz phase reset in the right tempor- oparietal junction with concurrent increases in low-frequency power across cortical regions that included the prefrontal cortex and left temporal lobe. Regions that exhibited a significant increase in 2– 4 Hz power were functionally bound together through progressive low-frequency 2– 4 Hz phase synchrony. Our data suggest that the interaction between power and phase synchrony reflects the engage- ment of attentional networks that in large part determine the extent to which memories are successfully encoded."

Last modified on 20-Mar-16

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