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Functional Connectivity of EEG LORETA in Cortical Core Components of the Self and the Default Network (DNt) of the Brain

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Check out this Knowledge Base article from StressTherapy Solutions: Functional Connectivity of EEG LORETA in Cortical Core Components of the Self and the Default Network (DNt) of the Brain.

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Study at a glance

Area
QEEG, Methods & Mechanisms
Study type
Observational study
Authors
Cannon RL
Journal
Doctoral dissertation, University of Tennessee, Knoxville (Trace repository)
Year
2009
Participants
63 participants
Protocol
sLORETA source localization of resting and task EEG

Key findings

  • Eyes-closed rest showed higher activity in all frequency bands than every other condition
  • Active self-related tasks increased activity relative to eyes-open rest in each region of interest, with effects differing by frequency band
  • Results agree with fMRI and PET studies of the default network
  • Differences may reflect internal versus external attention states rather than simple 'rest'

A doctoral dissertation that used EEG source localization (standardized low resolution electromagnetic tomography, sLORETA) to study the brain's default network and the cortical midline structures involved in processing the self. 63 participants were recorded with eyes closed, with eyes open and during tasks such as self-referential thinking, viewing their own image, and viewing other faces and objects. The author concludes that LORETA is accurate enough to study the default network and that 'rest' may reflect internally directed attention rather than inactivity.