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Integration of fMRI and simultaneous EEG: towards a comprehensive understanding of localization and time-course of brain activity in target detection

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Check out this Knowledge Base article from StressTherapy Solutions: Integration of fMRI and simultaneous EEG: towards a comprehensive understanding of localization and time-course of brain activity in target detection.

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Study at a glance

Area
QEEG, Methods & Mechanisms
Study type
Observational study
Authors
Mulert C, Jäger L, Schmitt R, Bussfeld P, Pogarell O, Möller HJ et al.
Journal
NeuroImage
Year
2004
Participants
9
Population
Adults
Protocol
Simultaneous 27-channel EEG and fMRI, auditory oddball, LORETA

Key findings

  • Early N1/P2 responses were weaker inside the scanner; the P300 was not
  • LORETA sources and fMRI activations agreed in most regions
  • Combining the two gives both where and when brain activity occurs

DOI 10.1016/j.neuroimage.2003.10.051 → PubMed 15109999 →

A methods study recording EEG and fMRI at the same time while healthy volunteers detected rare target tones, to combine fMRI's spatial precision with EEG's timing precision. It checked how much the scanner degrades EEG signals, then compared where LORETA placed the EEG sources with where fMRI found activity. The two largely agreed, supporting LORETA as a way to locate EEG activity.