That happen to be not restricted to chosen subregions inside the extrastriate ventrotemporal cortex but are rather extensively distributed and overlapping.In other words, the extrastriate ventrotemporal cortex is capable to generate an infinite number of neural response patterns certain for each category of objects being viewed (Haxby et al).Indeed, response patterns were so particular that it was attainable to predict what the subject was actually looking at.Furthermore, the specificity in the patterns changed only minimally even when the voxels together with the maximal response to a given category had been removed in the evaluation, indicating that the specificity in the neural response is really distributed within the extrastriate ventrotemporal cortex and is just not resulting from activity within a restricted location that drives the correlation.The functional architecture proposed by this model, named “object kind topology,” embodies the capacity on the inferior surface in the temporal lobe to produce distinctive representations to get a virtually limitless quantity of object categories.does visuAl Cortex call for vision to create And funCtionThe demonstration that the representation of a face or object is Eledoisin manufacturer sustained by a widely distributed neural activity within the ventral temporal cortex raises further questions.Is object kind topology in these cortical places strictly visual or does it represent a more abstract, supramodal, functional organization Subsequent, is visual knowledge a mandatory prerequisite for this functional organization to develop To address these questions, we utilised fMRI to measure brain responses within a group of blindfolded sighted subjects even though they performed nonvisual object recognition tasks.Tactile recognition of facemasks and manmade objects of every day use elicited distinct categoryspecific patterns of neural response inside the extrastriate ventral temporal cortex, that were comparable to these elicited by visual recognition (Haxby et al) in the similar object categories (Figure A; Pietrini et al).In addition, the neural response patterns elicited by tactile perception of bottles or footwear, the two manmade object categories in the study, correlated substantially with these evoked by visual perception with the same object category, indicating that these neural response patterns are supramodal in nature; that is, that they are not merely restricted to visual perception (Pietrini et alFigure Supramodal neural response patterns inside the human brain.(A,B) Supramodal neural response in extrastriate ventral temporal cortex.Beneath, examples of stimuli (life masks of faces, plastic bottles, and shoes) used throughout tactile and visual recognition of unique object categories in sighted and congenitally blind subjects.Brain regions that responded throughout tactile andor visual object perception in sighted subjects and during tactile perception in blind people.The inferior temporal (IT) and ventral temporal (VT) regions activated by tactile and visual object perception are indicated.The tactilevisual overlap map shows the regions activated by each tactile and visual perception (shown in yellow), as well as the regions activated only by tactile (red) and visual (green) perception.The white lines correspond to the places on the sagittal and axial slices.(C,D) Supramodal neural response in hMT cortex.Braillelike dot patterns moved on a plastic surface to provide translational and rotational tactile flow stimulation.Subjects’ hands lay around the PubMed ID:http://www.ncbi.nlm.nih.gov/pubmed/21541725 table with the index and middle fingers touching the plastic s.