The authors use combined electrostimulation, neurophysiology, microinjection and fMRI to show that stimulation of a site in the lateral geniculate nucleus of monkeys increases fMRI signals in regions of primary visual cortex, but suppresses it in retinotopically matched regions of extrastriate cortex. Their results suggest that electrostimulation disrupts cortico-cortical signal propagation by silencing the output of any neocortical area whose afferents are electrically stimulated.
- Nikos K Logothetis
- Mark Augath
- Hellmut Merkle
