Archive for the ‘Neuroscience and perception’ Category

Emotional influences on attention

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By Harlan M. Fichtenholtz & Kevin S. Labar, YaleUniversity and DukeUniversity. Published In:-  The Neuroscience of Attention Ed. George R. Mangun, Oxford University Press (2012) Summary and review of the above chapter INTRODUCTION:-  Attention and emotion are argued to be parallel processes interacting at many stages in the brain. Some brain regions are more involved with emotional response and others more with attentional control. Limbic regions act so as to bias sensory processing, Read more […]

Top-down biases in short-term memory

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Mark G Stokes & Anna C Nobre, Oxford University Published In:- “The Neuroscience of Attention” Ed. George R. Mangun, Oxford University Press (2012) Summary and review of the above chapter INTRODUCTION:  Top-down influences direct visual attention, and common neural mechanisms decide the items that are held in visual short-term memory, which is in turn a crucial driver of behaviour. Cognitive functions are seen as depending on information being retained in the brain after the original signal Read more […]

Frontal Eye Field and Direction of Attention

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  A Stage Theory of Attention and Action Jeffrey D. Schall & Geoffrey F. Woodman, Vanderbilt Vision Research Centre The Neuroscience of Attention – Ed. George R. Mangun, Oxford University Press (2012) Summary & Review of this Chapter INTRODUCTION: The frontal eye field (FEF) receives converging inputs from many cortical areas, and may use visual representations in working memory to select targets for spatial attention. The decision to shift the gaze is seen as being dependent Read more […]

Frontal eye field as controller of voluntary attention

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Attention and Action in the Frontal Eye Field by Katherine M. Armstrong, Robert J. Schafer, Mindy H. Chang & Tirin Moore:  Stanford University, School of Medicine Published in The Neuroscience of Attention Ed. by George Mangun, Oxford University Press (2012) Summary and review of the above chapter INTRODUCTION:  The operation of the frontal eye field, as distinct from other brain regions, is suggested to be independent of current sensory inputs, thus functioning in purely top-down Read more […]

Rolls on visual perception

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Neuroculture: On the implications of brain science for understanding Edmund T. Rolls, Oxford Centre for Computational Neuroscience Oxford University Press (2012) pp. 65- visual perception Summary and review of the above section Keywords:  visual perception, ventral stream, dorsal stream, reward/punishers Visual perception: It is pointed out that computer vision science has not yet mastered the problem of perception. Single neurons in the primary visual cortex respond to edges or Read more […]

Two visual systems model

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Spatial coordinates and phenomenology in the two visual systems model Pierre Jacob & Frederique de Vignemont, Institut Jean Nicod & New York University In:- Perception, Action & Consciousness (2010) – Eds. – Gangopadhyay, N., Madary, M. & Spicer, F. Goodale and Milner introduced the concept of the ‘two visual systems’ model in 1992. This involves a functional distinction between vision used for perception, involving the separation of an object from its background, and Read more […]

Perception and report

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The measurement problem in consciousness research Rafael Malach, Weizmann Institute Behavioural and Brain Sciences (2007) doi: 0.1017/S0140525X0700297X Keywords: perception, reportability, neuron, consciousness, self Malach argues that studies of brain processing can differentiate conscious perception from the process of reporting the perceptions, and that conscious perception does not require some higher-order read-out system or some form of self, but can be handled by groups of neurons, Read more […]

Perception, action, consciousness

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Perception, Action and Consciousness (Chapter 1) N. Gangopadhyay, M. Madary, & F. Spicer Oxford University Press (2010) This book sets out to discuss a debate within the cognitive sciences as to the relationship of perception and action. One view is that this involves on a dual visual system driving the mainly separate functioning of perception and action. The alternative proposal is a system in which the sensory and motor systems are interactive with perception, and where consciousness Read more […]

Perception without perceiver

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Perception without perceiver Rafael Malach, Dept. of Neurobiology (in conversation with Zoran Josipovic) Journal of Consciousness Studies, 13, No. 9, pp. 57-66 (2006) In this Q&A transcription published in the Journal of Consciousness Studies, Rafael Malach again argues that, at least in some cases, conscious perception does not require any form of ‘observer’ in the prefrontal area, but needs only activation in the sensory cortex. This claim is based on fMRI studies performed by Malach Read more […]

Systems for perception and action

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Cortical visual systems for perception and action David Milner & Melvyn Goodale, University of Durham and University of Western Ontario In:- Perception, Action and Consciousness – Eds. Gangopadhyay, N., Madary, M. & Spicer, F. Keywords:  ventral stream, dorsal stream, Milner & Goodale, Aglioti, Biegstraaten The authors had previously proposed a model in which there are distinct paths for vision for perception and vision for action. This involves to pathways the ventral Read more […]