Brain Topography

, Volume 23, Issue 2, pp 205–213

Transmission of Brain Activity During Cognitive Task

Authors

    • Department of Biomedical PhysicsUniversity of Warsaw
  • Rafal Kus
    • Department of Biomedical PhysicsUniversity of Warsaw
  • Maciej Kaminski
    • Department of Biomedical PhysicsUniversity of Warsaw
  • Joanna Janiszewska
    • Department of Biomedical PhysicsUniversity of Warsaw
Original Paper

DOI: 10.1007/s10548-010-0137-y

Cite this article as:
Blinowska, K., Kus, R., Kaminski, M. et al. Brain Topogr (2010) 23: 205. doi:10.1007/s10548-010-0137-y

Abstract

The transmission of brain activity during constant attention test was estimated by means of the short-time directed transfer function (SDTF). SDTF is an estimator based on a multivariate autoregressive model. It determines the propagation as a function of time and frequency. For nine healthy subjects the transmission of EEG activity was determined for target and non-target conditions corresponding to pressing of a switch in case of appearance of two identical images or withholding the reaction in case of different images. The involvement of prefrontal and frontal cortex manifested by the propagation from these structures was observed, especially in the early stages of the task. For the target condition there was a burst of propagation from C3 after pressing the switch, which can be interpreted as beta rebound upon completion of motor action. In case of non-target condition the propagation from F8 or Fz to C3 was observed, which can be connected with the active inhibition of motor cortex by right inferior frontal cortex or presupplementary motor area.

Keywords

Transmission of information in brainPropagation of EEG activityShort-time directed transfer functionGranger causalityCognitive processesContinuous attention testWorking memoryActive inhibition

Copyright information

© Springer Science+Business Media, LLC 2010