Abstract：
:We observed that presenting a low-contrast Gabor patch (2 cpd, 5 degrees eccentricity, contrast=4%) for 8 s and then flashing a 20-30 ms high-contrast patch over it could elicit the perceptual disappearance of a subsequent low-contrast stimulus, whereas neither low-contrast adaptation nor high-contrast flash alone had any considerable effect (p<0.00001). In other experiments we found (a) suppressive components are phase-insensitive, (b) the effect transfers between eyes, (c) suppression is selective for orientation, and (d) the induction by the transient high-contrast Gabor patch could be transferred to another previously adapted location up to a few degrees. Results indicate synergy between contrast and adaptation through a non-linear interaction between rapid gain adjustment to transient change and adaptation to sustained spatial patterns. Findings are compatible with non-local mechanisms presumably at the cortical level.
journal_name
Vision Resjournal_title
Vision researchauthors
Moradi F,Shimojo Sdoi
10.1016/j.visres.2003.10.005subject
Has Abstractpub_date
2004-03-01 00:00:00pages
449-60issue
5eissn
0042-6989issn
1878-5646pii
S0042698903006485journal_volume
44pub_type
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