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Optic and tactile flow: does a supramodal response exist?

Scilingo, Enzo Pasquale and Ricciardi, Emiliano and Pietrini, Pietro and Bicchi, Antonio Optic and tactile flow: does a supramodal response exist? In: 6th Annual Meeting of the International Multisensory Research Forum, June 5-8, 2005, Rovereto, Italy pp. 43-53. (2005)

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It is widely accepted [Morrone et al. Nature Neuroscience, 2000] that particular cortical areas like MT/V5 respond to optic flow stimuli. In order to test the hypothesis that the MT+ complex might also share a supramodal organization, we measured the neural response evoked during visual and tactile perception of coherently moving dot patterns (optic and tactile flows) in sighted and blind subjects by using functional magnetic resonance imaging. In particular a group of volunteers were asked to see and touch, during distinct trials, random distribution of dot patterns while moving in circular and translational direction. An ad hoc designed device made of nonmagnetic material was used. Both tactile and visual motion perception consistently activated MT+. In order to exclude the hypothesis that activation in visual cortical areas during tactile discrimination tasks might be attributed merely to visual imagery, tactile stimuli were presented to blind adults, confirming the activation of MT+ complex as well. Moreover, in order to assess the conjecture of supramodality of flow a magneto-compatible haptic display based on the contact area spread rate paradigm (specific aspect of tactile flow) was realized and used in fMRI experiment for investigating the neural activity elicited by tactile flow, providing satisfactory results.

Item Type: Conference or Workshop Item (Paper)
Subjects: R Medicine > RC Internal medicine > RC0321 Neuroscience. Biological psychiatry. Neuropsychiatry
Research Area: Computer Science and Applications
Depositing User: Caterina Tangheroni
Date Deposited: 23 Mar 2016 10:44
Last Modified: 13 Sep 2016 10:15
URI: http://eprints.imtlucca.it/id/eprint/3307

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