A study from Sheng Li’s lab combined behavioral and electroencephalogram (EEG) measurements and investigated the mechanisms of the information integration between different spatial frequency bands in scene perception. The results showed that the recognition of the high spatial frequency (HSF) component was interfered by the non-attended low spatial frequency (LSF) component at semantic level. Analyses of the EEG data revealed an early anterior N1 component (122 ms from stimulus onset) that was related to the observed interaction between the LSF and HSF components. These findings demonstrate that the semantic information from different spatial frequency bands can be integrated at early stage of the perceptual processing. This early integration is likely to occur at frontal areas in order to initiate top-down facilitation.

Mu,T., Li,S. (2013) The neural signature of spatial frequency-based information integration in scene perception.  Experimental Brain Research  227: 367-377.