Retinotopic organization of visual mental images as revealed by functional magnetic resonance imaging. - Archive ouverte HAL Access content directly
Journal Articles Cognitive Brain Research Year : 2004

Retinotopic organization of visual mental images as revealed by functional magnetic resonance imaging.

(1) , (1) , (1) , (1) , (1) , (1) , (2) , (3, 4) , (1)
1
2
3
4

Abstract

In this study, we used event-related functional magnetic resonance imaging to investigate whether visual mental images retinotopically activate early visual cortex. Six participants were instructed to visualize or view horizontally or vertically oriented flashing bow-tie shaped stimuli. When compared to baseline, imagery globally activated Area V1. When the activation evoked by the stimuli at the different orientations was directly compared, distinct spatial activation patterns were obtained for each orientation in most participants. Not only was the topography of the activation patterns from imagery similar to the topography obtained with a corresponding visual perception task, but it closely matched the individual cortical representation of either the horizontal or the vertical visual field meridians. These findings strongly support that visual imagery and perception share low-level anatomical substrate and functional processes. Binding of spatial features is suggested as one possible mechanism.

Dates and versions

hal-00349680 , version 1 (03-01-2009)

Identifiers

Cite

Isabelle Klein, Jessica Dubois, Jean-François Mangin, Ferath Kherif, Guillaume Flandin, et al.. Retinotopic organization of visual mental images as revealed by functional magnetic resonance imaging.. Cognitive Brain Research, 2004, 22 (1), pp.26-31. ⟨10.1016/j.cogbrainres.2004.07.006⟩. ⟨hal-00349680⟩
229 View
0 Download

Altmetric

Share

Gmail Facebook Twitter LinkedIn More