S. Kosslyn, W. L. Thompson, I. J. Kim, and N. M. Alpert, "Topographical representations of mental images in primary visual cortex," Nature 378, 496--498 (1995).  Home/Search   Document Not in Database   Summary   Related Articles   Check

....in the model also provide a convenient substrate for realizing visual imagery as illustrated by the top down reconstructed images in Figure 3. Indeed, recent PET studies have shown that imagery shares some of the same neural substrates as perception and can activate even the lowest visual areas [Kosslyn et al. 1995] . Equation 34 allows the effects of intrinsic neuronal noise to be modeled via the additive noise term . By assuming a probability distribution for this term and sampling from this distribution in Equation 34,the computation of the recognition state estimates can be made stochastic. ....

S.M. Kosslyn, W.L. Thompson, I.J. Kim, and N.M. Alpert. Topographical representations of mental images in primary visual cortex. Nature, 378:496--498, 1995.

.... with inputs in the form of a topographic display, like the one that is assumed to be normally provided by the eyes in other words we generate a display that is laid out in a spatial or depictive form (i.e. like a two dimensional picture) This interpretation was also supported by the finding (Kosslyn et al. 1995) that smaller images generated more activity in the posterior part of the medial occipital region and larger images generated more activity in the anterior parts of the region, a pattern that is similar to the activation produced by small and large retinal images, respectively. Draft of ....

Kosslyn, S. M., Thompson, W. L., Kim, I. J., & Alpert, N. M. (1995). Topographical representations of mental images in primary visual conrtex. Nature, 378(Nov 30), 496-498.

....around 80 100 ms after stimulus onset al..lows for feedback from extrastriate cortices, including IT [46] to impose more abstract and global constraints to the processing of information in V1. Consistent with this feedback hypothesis, psychophysical studies [47] and PET and NMR imaging studies [48] have also shown that V1 activity can be modulated by various top down influences, including mental imagery. Recent neurophysiological studies have shown that V1 neurons can be modulated by attention [49,50] and preliminary deactivation experimental results also suggested that some ....

Kosslyn S, Thompson WL, Kim IJ, Alpert NM. Topographical representations of mental images in primary visual cortex. Nature 1995;378:496 -- 8.

....features. 2. In mental rotation tasks with abstract figures (e.g. Shepard Metzler, 1971) subjects show delays proportional to angle of rotation, as if they are rotating a real image spatially. 3. The V1 area of primary visual cortex has been shown to become active during mental imagery (Kosslyn et al. 1995). In a domain in which compelling evidence is hard to come by, this is certainly strong evidence for some non propositional, sensorimotor component to higher cognition. Proponents of propositional views argue that the experience of a mental image is a constructed byproduct of some types of ....

Kosslyn, S.M., Thompson, W.L., Kim, I.J., & Alpert, N.M. (1995). Topographical representations of mental images in primary visual cortex. Nature, 378, 496-498.

....in the model also provide a convenient substrate for realizing visual imagery as illustrated by the top down reconstructed images in Figure 3. Indeed, recent PET studies have shown that imagery shares some of the same neural substrates as perception and can activate even the lowest visual areas [Kosslyn et al. 1995] . Equation 34 allows the effects of intrinsic neuronal noise to be modeled via the additive noise term n(t) By assuming a probability distribution for this term and sampling from this distribution in Equation 34,the computation of the recognition state estimates can be made stochastic. An ....

S.M. Kosslyn, W.L. Thompson, I.J. Kim, and N.M. Alpert. Topographical representations of mental images in primary visual cortex. Nature, 378:496--498, 1995.

.... developing an artificial preattentive visual architecture as an independent image processing system is inconsistent with current knowledge of the mammalian visual system, for which there is evidence proving the existence of a feed back loop between the preattentive and the attentive visual stages [67]. Our current implementation of the SAR segmentation scheme requires only one userdefined parameter to process different SAR images. This parameter is a contrast threshold provided with a clear physical meaning and belonging to the normalized range (0,1) Thus, the proposed segmentation scheme is ....

S. M. Kosslyn, W. L. Thompson, I. J. Kim and N. M. Alpert, "Topographical representations of mental images in primary visual cortex," Nature, vol. 378, pp. 496-497, 1995. xxxix

....share common underlying brain structures. The involvement of cortical structures common to visual imagery and perception is supported by studies on evoked potentials (Farah et al. 1988) regional cerebral blood flow (Goldenberg et al. 1989) positron emission tomography (Kosslyn et al. 1993; Kosslyn et al. 1995; Roland et al. 1987; Roland and Gulyas, 1995) and functional magnetic resonance imaging (Bihan et al. 1993) Neuropsychological case studies provide support for the hypothesis that visual imagery and perception share the same neural substrate (Bisiach and Luzzatti, 1978; Mehta et al. 1992) ....

.... that the visual areas subserving visual imagery are a subset of those active in visual perception (Behrmann et al. 1992; Jankowiak et al. 1992) Data indicating activity in early visual areas during visual imagery suggest that identical visual areas subserve both systems (Bihan et al. 1993; Kosslyn et al. 1995). However, these areas are not activated during visual imagery in all subjects, and are activated mainly by tasks that require high resolution images (Roland and Gulyas, 1994; Sakai and Miyashita, 1994) The effect of visual imagery on visual perception is controversial. Many studies show that ....

Kosslyn, S., Thompson, W., Kim, I., and Alpert, N. (1995). Topographical representations of mental images in primary visual cortex. Nature, 378:496--498.

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Kosslyn, S.M., Thompson, W.L., Kim, I.J. and Alpert, N.M., (1995) Topographical representations of mental images in primary visual cortex, Nature 378, 496-498

No context found.

S. Kosslyn, W. L. Thompson, I. J. Kim, and N. M. Alpert, "Topographical representations of mental images in primary visual cortex," Nature 378, 496--498 (1995).

No context found.

S. Kosslyn, W.L. Thompson, I.J. Kim, N.M. Alpeft, (1995). "Topographical represen- tations of mental images in primary visual cortex," Nature, 378, 496-498 (1995).

No context found.

S. Kosslyn, W.L. Thompson, I.J. Kim, N.M. Alpeft, (1995). "Topographical represen- tations of mental images in primary visual cortex," Nature 378, 496-498 (1995).

No context found.

Kosslyn, S.M. et al. (1995) Topographical representations of mental images in primary visual cortex Nature 378, 496--498

No context found.

Kosslyn SM, Thompson WL, Kim IJ, Alpert NM (1995) Topographical representations of mental images in primary visual cortex. Nature 378:496-498.

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