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Brain-state determines learning improvements after transcranial alternating-current stimulation to frontal cortex.

Abstract：

BACKGROUND:Theories of executive control propose that communication between medial frontal cortex (MFC) and lateral prefrontal cortex (lPFC) is critical for learning. 6-Hz phase synchronization may be the mechanism by which neural activity between MFC and lPFC is coordinated into a functional network. Recent evidence suggests that switching from eyes closed to open may induce a change in brain-state reflected by enhanced executive control and related functional connectivity. OBJECTIVE/HYPOTHESIS:To examine whether causal manipulation of MFC and lPFC can improve learning according to the brain-state induced by switching from eyes closed to open. METHODS:Within-subjects, sham-controlled, double-blind study of 30 healthy subjects, each receiving 6-Hz in-phase high definition transcranial alternating-current stimulation (HD-tACS) applied to MFC and right lPFC prior to performing a time estimation task. RESULTS:HD-tACS with eyes open improved learning ability relative to sham, whereas HD-tACS with eyes closed had no significant effect on behavior. CONCLUSION:Results suggest a phase-sensitive mechanism in frontal cortex mediates components of learning performance in a state-dependent manner.

journal_name

Brain Stimul

journal_title

Brain stimulation

authors

Nguyen J,Deng Y,Reinhart RMG

doi

10.1016/j.brs.2018.02.008

subject

Has Abstract

pub_date

2018-01-01 00:00:00

pages

723-726

issue

4

eissn

1935-861X

issn

1876-4754

pii

S1935-861X(18)30071-8

journal_volume

11

pub_type

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