TY - JOUR
T1 - Spatio-temporal dynamics in fMRI recordings revealed with complex independent component analysis
AU - Anemüller, Jörn
AU - Duann, Jeng Ren
AU - Sejnowski, Terrence J.
AU - Makeig, Scott
N1 - Funding Information:
We acknowledge support by the German Research Council DFG (J. A.), and by the Swartz Foundation.
PY - 2006/8
Y1 - 2006/8
N2 - Independent component analysis (ICA) of functional magnetic resonance imaging (fMRI) data is commonly carried out under the assumption that each source may be represented as a spatially fixed pattern of activation, which leads to the instantaneous mixing model. To allow modeling patterns of spatio-temporal dynamics, in particular, the flow of oxygenated blood, we have developed a convolutive ICA approach: spatial complex ICA applied to frequency-domain fMRI data. In several frequency-bands, we identify components pertaining to activity in primary visual cortex (V1) and blood supply vessels. One such component, obtained in the 0.10 Hz band, is analyzed in detail and found to likely reflect flow of oxygenated blood in V1.
AB - Independent component analysis (ICA) of functional magnetic resonance imaging (fMRI) data is commonly carried out under the assumption that each source may be represented as a spatially fixed pattern of activation, which leads to the instantaneous mixing model. To allow modeling patterns of spatio-temporal dynamics, in particular, the flow of oxygenated blood, we have developed a convolutive ICA approach: spatial complex ICA applied to frequency-domain fMRI data. In several frequency-bands, we identify components pertaining to activity in primary visual cortex (V1) and blood supply vessels. One such component, obtained in the 0.10 Hz band, is analyzed in detail and found to likely reflect flow of oxygenated blood in V1.
KW - Biomedical signal analysis
KW - Complex independent component analysis (complex ICA)
KW - Convolution model
KW - Functional magnetic resonance imaging (fMRI)
KW - Hemodynamic response
KW - Primary visual cortex (VI)
KW - Spatio-temporal dynamics
KW - Statistical signal processing
UR - http://www.scopus.com/inward/record.url?scp=33745219876&partnerID=8YFLogxK
U2 - 10.1016/j.neucom.2005.12.029
DO - 10.1016/j.neucom.2005.12.029
M3 - 期刊論文
AN - SCOPUS:33745219876
SN - 0925-2312
VL - 69
SP - 1502
EP - 1512
JO - Neurocomputing
JF - Neurocomputing
IS - 13-15
ER -