Lin, Yih-Shiuan and Chen, Chien-Chung and Greenlee, Mark W. (2022) The role of lateral modulation in orientation-specific adaptation effect. JOURNAL OF VISION, 22 (2): 13. ISSN 1534-7362,
Full text not available from this repository. (Request a copy)Abstract
Center-surround modulation in visual processing reflects a normalization process of contrast gain control in the responsive neurons. Prior adaptation to a clockwise (CW) tilted grating, for example, leads to the percept of counterclockwise tilt in a vertical grating, referred to as the tilt-aftereffect (TAE). We previously reported that the magnitude of the TAE is modulated by adding a same-orientation annular surround to an adapter, suggesting inhibitory lateral modulation. To further examine the property of this lateral modulation effect on the perception of a central target, we here used center-surround sinusoidal patterns as adapters and varied the adapter surround and center orientations independently. The target had the same spatial extent as the adapter center with no physical overlap with the adapter surround. Participants were asked to judge the target orientation as tilted either CW or counterclockwise from vertical after adaptation. Results showed that, when the surround orientation was held constant, the TAE magnitude was determined by the adapter center, peaking between 10 degrees and 20 degrees of tilt. More important, the adapter surround orientation modulated the adaptation effect such that the TAE magnitude first decreased and then increased as the surround orientation became increasingly more different from that of the center, suggesting that the surround modulation effect was indeed orientation specific. Our data can be accounted for by a divisive inhibition model, in which (1) the adaptation effect is represented by increasing the normalizing constant and (2) the surround modulation is captured by two multiplicative sensitivity parameters determined by the adapter surround orientation.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | CLASSICAL RECEPTIVE-FIELD; PRIMARY VISUAL-CORTEX; MACAQUE V1; SURROUND SUPPRESSION; CONTRAST ADAPTATION; SPATIAL SUMMATION; FUNCTIONAL ARCHITECTURE; PERCEIVED CONTRAST; INTEGRATION FIELD; ORIENTED FILTERS; lateral modulation; surround inhibition; tilt-aftereffect; spatial vision; divisive inhibition |
| Subjects: | 100 Philosophy & psychology > 150 Psychology |
| Divisions: | Human Sciences > Institut für Psychologie > Lehrstuhl für Psychologie I (Allgemeine Psychologie I und Methodenlehre) - Prof. Dr. Mark W. Greenlee |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 09 Jan 2024 09:54 |
| Last Modified: | 09 Jan 2024 09:54 |
| URI: | https://pred.uni-regensburg.de/id/eprint/57112 |
Actions (login required)
 |
View Item |
