Aan u verzonden door Sander via Google Reader:
PLoS One. 2011; 6(10): e26154
De Stefani E, Pinello L, Campana G, Mazzarolo M, Lo Giudice G, Casco C
Our visual percepts are not fully determined by physical stimulus inputs. Thus, in visual illusions such as the Kanizsa figure, inducers presented at the corners allow one to perceive the bounding contours of the figure in the absence of luminance-defined borders. We examined the discrimination of the curvature of these illusory contours that pass across retinal scotomas caused by macular degeneration. In contrast with previous studies with normal-sighted subjects that showed no perception of these illusory contours in the region of physiological scotomas at the optic nerve head, we demonstrated perfect discrimination of the curvature of the illusory contours over the pathological retinal scotoma. The illusion occurred despite the large scar around the macular lesion, strongly reducing discrimination of whether the inducer openings were acute or obtuse and suggesting that the coarse information in the inducers (low spatial frequency) sufficed. The result that subjective contours can pass through the pathological retinal scotoma suggests that the visual cortex, despite the loss of bottom-up input, can use low-spatial frequency information from the inducers to form a neural representation of new complex geometrical shapes inside the scotoma.
Dingen die u vanaf hier kunt doen:
- Abonneren op HubMed - ("Plos One"[Journal] or 1091-6490[ISSN] or "current biology"[journal] or "Science"[Journal] or "nature"[Journal]) and (cognitive or cognition or emotion or emotions or mind or psychological or psychological or neuroscientific or neuroscience or neuropsychological or attention or perception or vision or social) met Google Reader
- Aan de slag met Google Reader om eenvoudig al uw favoriete sites bij te houden
Geen opmerkingen:
Een reactie posten