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Revealing areas involved in feature binding with fMR adaptation. Ryota Kanai & Vincent Walsh. Institute of Cognitive Neuroscience and Department of Psychology. University College London. Steady-state misbinding of colour and motion.
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Revealing areas involved in feature binding with fMR adaptation Ryota Kanai & Vincent Walsh Institute of Cognitive Neuroscience and Department of Psychology University College London
Steady-state misbinding of colour and motion Perceived combination of colour and motion can be dissociated from the actual combination
Question: Are there regions selectively responding to perceived combination? Methods: fMR adaptation Condition 1: Physically alternating perceptually constant (in the periphery) Periphery Periphery Center Center Alternate every 2s Condition 2: Physically constant perceptual alternating (in the periphery) Periphery Periphery Center Center Two baseline control conditinos Condition 3: Physically constant perceptually constant (in the periphery) Condition 4: Physically constant perceptual alternating (in the periphery)
Analysis & Prediction We will analyze the responses in the voxles identified by a localizer scan for the peripheral stimuli only. For every subject, we will first conduct a retinotopic scan to isolate early visual areas. 1. Areas responding to physical colour-motion combination will show higher activity in the condition with physical alternation & constant percept. 2. Areas responding to perceptual combination will show higher activity in the condition with perceptual alternation & constant stimulus.
