Abstract:
:In this paper, functional connectivity of steady-state visual evoked potential (SSVEP) was investigated. Directed transfer function (DTF) was applied to cortical signals recorded from electroencephalography (EEG) in order to obtain connectivity patterns. Flow gain was proposed to assess the role of the specific brain region involved in the information transmission process. We found network connections exist in many regions beyond occipital region. Flow gain mapping both in 8-12Hz and 13-30Hz showed that parietal region seemed to serve as the sole hub of information transmission. Further studies of flow gain obtained from channel Pz showed two distinct peaks centered at about 12Hz low frequency and 20Hz medium frequency respectively. The low frequency region had a larger value of flow gain. The present study introduced functional connectivity into SSVEP. Furthermore, we put forward the concept of flow gain for the first time to explore the exchange and processing of brain information during SSVEP.
journal_name
Neurosci Lettjournal_title
Neuroscience lettersauthors
Yan Z,Gao Xdoi
10.1016/j.neulet.2011.05.061subject
Has Abstractpub_date
2011-07-25 00:00:00pages
199-203issue
3eissn
0304-3940issn
1872-7972pii
S0304-3940(11)00687-2journal_volume
499pub_type
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