Auditory triggered mental imagery of shape involves visual association areas in early blind humans

Citation
Ag. De Volder et al., Auditory triggered mental imagery of shape involves visual association areas in early blind humans, NEUROIMAGE, 14(1), 2001, pp. 129-139
Citations number
55
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Neurosciences & Behavoir
Journal title
NEUROIMAGE
ISSN journal
1053-8119 → ACNP
Volume
14
Issue
1
Year of publication
2001
Part
1
Pages
129 - 139
Database
ISI
SICI code
1053-8119(200107)14:1<129:ATMIOS>2.0.ZU;2-F
Abstract
Previous neuroimaging studies identified a large network of cortical areas involved in visual imagery in the human brain, which includes occipitotempo ral and visual associative areas. Here we test whether the same processes c an be elicited by tactile and auditory experiences in subjects who became b lind early in life. Using positron emission tomography, regional cerebral b lood flow was assessed in six right-handed early blind and six age-matched control volunteers during three conditions: resting state, passive listenin g to noise sounds, and mental imagery task (imagery of object shape) trigge red by the sound of familiar objects. Activation foci were found in occipit otemporal and visual association areas, particularly in the left fusiform g yrus (Brodmann areas 19-37), during mental imagery of shape by both groups. Since shape imagery by early blind subjects does involve similar visual st ructures as controls at an adult age, it indicates their developmental cros smodal reorganization to allow perceptual representation in the absence of vision. (C) 2001 Academic Press.