TY  - JOUR
AU  - Heinzel, A.
AU  - Hautzel, H.
AU  - Poeppel, T. D.
AU  - Boers, F.
AU  - Beu, M.
AU  - Mueller, H.-W.
TI  - Neural correlates of subliminal and supraliminal letter processing - An event-related fMRI study
JO  - Consciousness and cognition
VL  - 17
SN  - 1053-8100
CY  - Orlando, Fla.
PB  - Academic Press
M1  - PreJuSER-542
SP  - 699 - 713
PY  - 2008
N1  - Record converted from VDB: 12.11.2012
AB  - One problem of interpreting research on subconscious processing is the possibility that participants are weakly conscious of the stimuli. Here, we compared the fMRI BOLD response in healthy adults to clearly visible single letters (supraliminal presentation) with the response to letters presented in the absence of any behavioural evidence of visibility (subliminal presentation). No letter catch trials served as a control condition. Forced-choice responses did not differ from chance when letter-to-background contrast was low, whereas they were almost 100% correct when contrast was high. A comparison of fMRI BOLD signals for supraliminal and subliminal letters with the control trials revealed a signal increase in left BA 37 (fusiform gyrus). Comparison of supraliminal with subliminal letters showed a significant increase in the right inferior frontal gyrus (BA 44, partly extending to BA 9 and BA 45, as well as BA 46). Finally, a comparison of subliminal with supraliminal letters showed increases in the left middle temporal gyrus (BA 21) and the right extrastriate cortex (BA 19).
KW  - Adult
KW  - Brain: physiology
KW  - Humans
KW  - Linguistics
KW  - Magnetic Resonance Imaging
KW  - Male
KW  - Unconscious (Psychology)
KW  - Visual Perception
LB  - PUB:(DE-HGF)16
C6  - pmid:18331801
UR  - <Go to ISI:>//WOS:000258259500012
DO  - DOI:10.1016/j.concog.2008.01.008
UR  - https://juser.fz-juelich.de/record/542
ER  -