Ricciardi, Emiliano and Tozzi, Leonardo and Leo, Andrea and Pietrini, Pietro Modality Dependent Cross-Modal Functional Reorganization Following Congenital Visual Deprivation within Occipital Areas: A Meta-Analysis of Tactile and Auditory Studies. Multisensory Research, 27 (3-4). pp. 247-262. ISSN 2213-4794 (2014)
Full text not available from this repository.Abstract
Cross-modal responses in occipital areas appear to be essential for sensory processing in visually deprived subjects. However, it is yet unclear whether this functional recruitment might be dependent on the sensory channel conveying the information. In order to characterize brain areas showing task-independent, but sensory specific, cross-modal responses in blind individuals, we pooled together distinct brain functional studies in a single based meta-analysis according only to the modality conveying experimental stimuli (auditory or tactile).Our approach revealed a specific functional cortical segregation according to the sensory modality conveying the non-visual information, irrespectively from the cognitive features of the tasks. In particular, dorsal and posterior subregions of occipital and superior parietal cortex showed a higher cross-modal recruitment across tactile tasks in blind as compared to sighted individuals. On the other hand, auditory stimuli activated more medial and ventral clusters within early visual areas, the lingual and inferior temporal cortex. These findings suggest a modality-specific functional modification of cross-modal responses within different portions of the occipital cortex of blind individuals. Cross-modal recruitment can thus be specifically influenced by the intrinsic features of sensory information.
| Item Type: | Article |
|---|---|
| Identification Number: | 10.1163/22134808-00002454 |
| Uncontrolled Keywords: | fMRI, Cross-modal brain responses, Activation likelihood estimation, PET, Meta-analysis, Blind |
| Subjects: | R Medicine > RC Internal medicine > RC0321 Neuroscience. Biological psychiatry. Neuropsychiatry |
| Research Area: | Computer Science and Applications |
| Depositing User: | Caterina Tangheroni |
| Date Deposited: | 10 Nov 2015 11:34 |
| Last Modified: | 13 Sep 2016 09:45 |
| URI: | http://eprints.imtlucca.it/id/eprint/2870 |
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