Imaging the visual autokinetic illusion with fMRI
| Autor: | Angela Deutschländer, Eva Riedel, Marianne Dieterich, Roger Kalla, Thomas Stephan, Thomas Brandt, Martin Wiesmann |
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| Rok vydání: | 2005 |
| Předmět: |
Adult
Male medicine.medical_specialty genetic structures Cognitive Neuroscience media_common.quotation_subject Motion Perception Fixation Ocular Fixation time Audiology Stimulus (physiology) Perception Image Processing Computer-Assisted medicine Humans Bold fmri media_common Communication Autokinetic effect business.industry Healthy subjects Brain Magnetoencephalography Illusions Magnetic Resonance Imaging Oxygen Neurology Data Interpretation Statistical Darkness Fixation (visual) Female sense organs business Psychology Photic Stimulation |
| Zdroj: | NeuroImage. 27:163-166 |
| ISSN: | 1053-8119 |
| Popis: | During fixation of a stationary, dim light-emitting diode (LED) in complete darkness, a subtle, apparent motion is perceived which is called autokinesis. This autokinetic illusion increases with increasing fixation time. Eleven healthy subjects were examined by fMRI while fixating an LED in darkness for 35 s. BOLD signal changes of the first and the second half of the fixation period were compared. While the stimulus was the same for both periods, perception differed in that autokinesis was more pronounced in the second half. This second half of the period was associated with bilateral activations in the motion-sensitive middle occipito-temporal area known as MT/V5. Our finding suggests that area MT/V5 is involved in the mediation of autokinesis. |
| Databáze: | OpenAIRE |
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