The Timing of Feedback to Early Visual Cortex in the Perception of Long-Range Apparent Motion

Wibral, M., Bledowski, C., Kohler, A., Singer, W. and Muckli, L. (2009) The Timing of Feedback to Early Visual Cortex in the Perception of Long-Range Apparent Motion. Cerebral Cortex, 19(7), pp. 1567-1582. (doi: 10.1093/cercor/bhn192)

Abstract

When 2 visual stimuli are presented one after another in different locations, they are often perceived as one, but moving object. Feedback from area human motion complex hMT/V5+ to V1 has been hypothesized to play an important role in this illusory perception of motion. We measured event-related responses to illusory motion stimuli of varying apparent motion (AM) content and retinal location using Electroencephalography. Detectable cortical stimulus processing started around 60-ms poststimulus in area V1. This component was insensitive to AM content and sequential stimulus presentation. Sensitivity to AM content was observed starting around 90 ms post the second stimulus of a sequence and most likely originated in area hMT/V5+. This AM sensitive response was insensitive to retinal stimulus position. The stimulus sequence related response started to be sensitive to retinal stimulus position at a longer latency of 110 ms. We interpret our findings as evidence for feedback from area hMT/V5+ or a related motion processing area to early visual cortices (V1, V2, V3).

• Item Type: Articles
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Muckli, Professor Lars
• Authors: Wibral, M., Bledowski, C., Kohler, A., Singer, W., and Muckli, L.
• College/School: College of Science and Engineering > School of Psychology; College of Medical Veterinary and Life Sciences > School of Psychology & Neuroscience
• Journal Name: Cerebral Cortex
• ISSN: 1047-3211