6533b7d8fe1ef96bd126a468

RESEARCH PRODUCT

Imaging the visual autokinetic illusion with fMRI

Angela DeutschländerEva RiedelMarianne DieterichRoger KallaThomas StephanThomas BrandtMartin Wiesmann

subject

AdultMalemedicine.medical_specialtygenetic structuresCognitive Neurosciencemedia_common.quotation_subjectMotion PerceptionFixation OcularFixation timeAudiologyStimulus (physiology)PerceptionImage Processing Computer-AssistedmedicineHumansBold fmrimedia_commonCommunicationAutokinetic effectbusiness.industryHealthy subjectsBrainMagnetoencephalographyIllusionsMagnetic Resonance ImagingOxygenNeurologyData Interpretation StatisticalDarknessFixation (visual)Femalesense organsbusinessPsychologyPhotic Stimulation

description

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.

yearjournalcountryeditionlanguage
2005-08-01NeuroImage
https://doi.org/10.1016/j.neuroimage.2005.03.029