BOLD-signal changes in human visual cortex related to the fading of learned somatosensory-visual associations

Analogous to synchronisation phenomena in local neuronal assemblies (Singer, 1999), the integration of different sensory modalities might rely on a play of synchronisation and desynchronisation of neuronal activity across distributed cortical areas (Varela et al., 2001). In line with this hypothesis, Miltner et al. (1999) reported learned gamma-band coherency (37–43Hz) between visual and somatosensory cortex in the electroencephalogram after visual-somatosensory associations had been established. The coherency vanished after an extinction period. Our study aims to gather evidence on the fading of learned crossmo…