02084nas a2200253 4500008004100000245009000041210006900131260003800200300001600238490000700254520127800261653001201539100001701551700001501568700001201583700001601595700002001611700001501631700001701646700001501663700001501678700001601693856012101709 2007 eng d00aThe Effect of Visual Experience on the Development of Functional Architecture in hMT+0 aEffect of Visual Experience on the Development of Functional Arc bOxford University PresscMarch 19 a2933 - 29390 v173 a
We investigated whether the visual hMT+ cortex plays a role in supramodal representation of sensory flow, not mediated by visual mental imagery. We used functional magnetic resonance imaging to measure neural activity in sighted and congenitally blind individuals during passive perception of optic and tactile flows. Visual motion-responsive cortex, including hMT+, was identified in the lateral occipital and inferior temporal cortices of the sighted subjects by response to optic flow. Tactile flow perception in sighted subjects activated the more anterior part of these cortical regions but deactivated the more posterior part. By contrast, perception of tactile flow in blind subjects activated the full extent, including the more posterior part. These results demonstrate that activation of hMT+ and surrounding cortex by tactile flow is not mediated by visual mental imagery and that the functional organization of hMT+ can develop to subserve tactile flow perception in the absence of any visual experience. Moreover, visual experience leads to a segregation of the motion-responsive occipitotemporal cortex into an anterior subregion involved in the representation of both optic and tactile flows and a posterior subregion that processes optic flow only.
10aHaptics1 aRicciardi, E1 aVanello, N1 aSani, L1 aGentili, C.1 aScilingo, E. P.1 aLandini, L1 aGuazzelli, M1 aBicchi, A.1 aHaxby, J V1 aPietrini, P uhttp://www.centropiaggio.unipi.it/publications/effect-visual-experience-development-functional-architecture-hmt.html00893nas a2200265 4500008004100000245015000041210006900191260001300260300001300273490000700286653001200293100001700305700001200322700001600334700001400350700001500364700001500379700001600394700001700410700001500427700001500442700001600457700001600473856013800489 2006 eng d00aBrain response to visual, tactile and auditory flow in sighted and blind individuals supports a supramodal functional organization in hMT complex0 aBrain response to visual tactile and auditory flow in sighted an bElsevier a512 TH-P0 v3110aHaptics1 aRicciardi, E1 aSani, L1 aGentili, C.1 aBonino, D1 aVanello, N1 aHaxby, J V1 aSeifritz, E1 aGuazzelli, M1 aLandini, L1 aBicchi, A.1 aDi Salle, F1 aPietrini, P uhttp://www.centropiaggio.unipi.it/publications/brain-response-visual-tactile-and-auditory-flow-sighted-and-blind-individuals-supports00753nas a2200229 4500008004100000245009400041210006900135300001400204490000700218653001200225100001600237700001700253700001600270700001400286700001500300700001200315700001300327700001700340700001500357700001500372856013600387 2005 eng d00aOltre le immagini sensoriali: la rappresentazione degli oggetti nella via visiva ventrale0 aOltre le immagini sensoriali la rappresentazione degli oggetti n aS81–S830 v2610aHaptics1 aPietrini, P1 aRicciardi, E1 aGentili, C.1 aBonino, D1 aVanello, N1 aSani, L1 aDanti, S1 aGuazzelli, M1 aBicchi, A.1 aVecchi, TE uhttp://www.centropiaggio.unipi.it/publications/oltre-le-immagini-sensoriali-la-rappresentazione-degli-oggetti-nella-visiva-ventrale01538nas a2200265 4500008004100000245009700041210006900138520068700207653001200894100001500906700001700921700001300938700001900951700002000970700001600990700001201006700001601018700002201034700001701056700001501073700001501088700001501103700001601118856013801134 2004 eng d00aPerception of Optic and Tactile Flow Both Activate V5/MT cortical complex in the human brain0 aPerception of Optic and Tactile Flow Both Activate V5MT cortical3 aV5/MT complex responds selectively to perception of optic flow (Morrone et al., Nature Neurosci , 2001). Since similarities exist between visual and tactile perception, we hypothesized that tactile flow might also rely on V5/MT response. We and others have shown recently that visual extrastriate cortical areas respond both during visual and tactile recognition of objects, indicating that these regions are organized in a supramodal fashion. In this study, we measured neural response evoked during visual and tactile perception of coherently moving dot patterns to test the hypothesis that V5/MT may be supramodally organized and may respond also to tactile stimulation.
10aHaptics1 aVanello, N1 aRicciardi, E1 aDente, D1 aSgambelluri, N1 aScilingo, E. P.1 aGentili, C.1 aSani, L1 aPositano, V1 aSantarelli, M. F.1 aGuazzelli, M1 aHaxby, J V1 aLandini, L1 aBicchi, A.1 aPietrini, P uhttp://www.centropiaggio.unipi.it/publications/perception-optic-and-tactile-flow-both-activate-v5mt-cortical-complex-human-brain.html01357nas a2200277 4500008004100000245009400041210006900135300001200204520048800216653001200704100001700716700001500733700001300748700001900761700002000780700001600800700001200816700001600828700002200844700001700866700001500883700001500898700001500913700001600928856013500944 2004 eng d00aPerception of visual and tactile flow activates common cortical areas in the human brain.0 aPerception of visual and tactile flow activates common cortical a290-2923 aWe report results of a pilot study using functional magnetic resonance imaging aimed at determining the neural correlates of tactile flow. We hypothesized that brain response to tactile flow would involve the same cortical areas (V5/MT) that respond to optic flow. Our results showed that V5/MT cortex indeed is activated by tactile flow perception. These findings are consistent with a supramodal organization of brain regions involved in optic and tactile flow processing.
10aHaptics1 aRicciardi, E1 aVanello, N1 aDente, D1 aSgambelluri, N1 aScilingo, E. P.1 aGentili, C.1 aSani, L1 aPositano, V1 aSantarelli, M. F.1 aGuazzelli, M1 aHaxby, J V1 aLandini, L1 aBicchi, A.1 aPietrini, P uhttp://www.centropiaggio.unipi.it/publications/perception-visual-and-tactile-flow-activates-common-cortical-areas-human-brain.html