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- Conscious Awareness of Flicker in Humans Involves Frontal and
Parietal Cortex Current Biology, Volume 16, Issue 9, 9 May 2006,
Pages 907-911 David Carmel, Nilli Lavie and Geraint Rees
SummaryEven when confined to the same spatial location,
flickering and steady light evoke very different conscious
experiences because of their distinct temporal patterns. The
neural basis of such differences in subjective experience
remains uncertain . Here, we used functional MRI in humans to
examine the neural structures involved in awareness of flicker.
Participants viewed a single point source of light that
flickered at the critical flicker fusion (CFF) threshold, where
the same stimulus is sometimes perceived as flickering and
sometimes as steady (fused) [1,2,3]. We were thus able to
compare brain activity for conscious percepts that differed
qualitatively (flickering or fused) but were evoked b