Sound alters activity in human V1 in association with illusory visual perception
| Autor: | Ladan Shams, Susanne Watkins, Geraint Rees, John-Dylan Haynes, Shigeki Tanaka |
|---|---|
| Rok vydání: | 2005 |
| Předmět: |
Auditory perception
Adult Male Superior Colliculi Visual perception Auditory Pathways genetic structures Adolescent Cognitive Neuroscience media_common.quotation_subject Illusion Blindsight Visual system Retina medicine Image Processing Computer-Assisted Psychophysics Humans Attention Visual Pathways Dominance Cerebral media_common Visual Cortex Auditory Cortex Brain Mapping Optical illusion Optical Illusions Multisensory integration Magnetic Resonance Imaging Temporal Lobe Visual cortex medicine.anatomical_structure Neurology Acoustic Stimulation Auditory Perception Female Nerve Net Psychology Neuroscience Photic Stimulation Cognitive psychology |
| Zdroj: | NeuroImage. 31(3) |
| ISSN: | 1053-8119 |
| Popis: | When a single brief visual flash is accompanied by two auditory bleeps, it is frequently perceived incorrectly as two flashes. Here, we used high field functional MRI in humans to examine the neural basis of this multisensory perceptual illusion. We show that activity in retinotopic visual cortex is increased by the presence of concurrent auditory stimulation, irrespective of any illusory perception. However, when concurrent auditory stimulation gave rise to illusory visual perception, activity in V1 was enhanced, despite auditory and visual stimulation being unchanged. These findings confirm that responses in human V1 can be altered by sound and show that they reflect subjective perception rather than the physically present visual stimulus. Moreover, as the right superior temporal sulcus and superior colliculus were also activated by illusory visual perception, together with V1, they provide a potential neural substrate for the generation of this multisensory illusion. |
| Databáze: | OpenAIRE |
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