Cooperation and biased competition model can explain attentional
... Focused attention task and inattentional blindness We model a visual attentional experiment, performed by Everling et al. (2002), that monitors the activity level of single neurons in the prefrontal cortex (PFC) of awake behaving monkeys engaged in a focused attention task. In this experiment, a mon ...
... Focused attention task and inattentional blindness We model a visual attentional experiment, performed by Everling et al. (2002), that monitors the activity level of single neurons in the prefrontal cortex (PFC) of awake behaving monkeys engaged in a focused attention task. In this experiment, a mon ...
Predictive Coding as a Model of Biased Competition in Visual
... between linear mechanisms of excitation and inhibition (Reynolds and Chelazzi, 2004), several physiological mechanisms have been identified that could allow cortical feedback to have a direct modulatory effect on neural responses (Friston, 2005; Larkum et al., 2004; Spruston, 2008; Sripati and Johns ...
... between linear mechanisms of excitation and inhibition (Reynolds and Chelazzi, 2004), several physiological mechanisms have been identified that could allow cortical feedback to have a direct modulatory effect on neural responses (Friston, 2005; Larkum et al., 2004; Spruston, 2008; Sripati and Johns ...
ATTENTIONAL MODULATION OF VISUAL PROCESSING John H
... Single-unit recording studies in the monkey have provided detailed, quantitative descriptions of how attention alters visual cortical neuron responses. When attention is directed to a location inside the receptive field (RF), the neuron’s contrast-response threshold is reduced, enabling it to respon ...
... Single-unit recording studies in the monkey have provided detailed, quantitative descriptions of how attention alters visual cortical neuron responses. When attention is directed to a location inside the receptive field (RF), the neuron’s contrast-response threshold is reduced, enabling it to respon ...
urn_nbn_fi_jyu-20
... anything happening in our surroundings while being absorbed in the inspection of something; focusing our attention on a certain object may happen to such an extent that we cannot perceive other objects placed in the peripheral parts of our visual fields, although the light rays they emit arrive comp ...
... anything happening in our surroundings while being absorbed in the inspection of something; focusing our attention on a certain object may happen to such an extent that we cannot perceive other objects placed in the peripheral parts of our visual fields, although the light rays they emit arrive comp ...
Relative timing: from behaviour to neurons
... tactile stimuli than for visual stimuli, and thus presumably more reliable from trial to trial. The comparable TOJ thresholds between visual and non-visual modalities suggest that the reliability of TOJs are likely limited by central processes, or even that TOJs for different sensory modalities coul ...
... tactile stimuli than for visual stimuli, and thus presumably more reliable from trial to trial. The comparable TOJ thresholds between visual and non-visual modalities suggest that the reliability of TOJs are likely limited by central processes, or even that TOJs for different sensory modalities coul ...
Full Article - CIHR Research Group in Sensory
... surprise that identical conditions can yield different results from one subject to the next. By examining the different strategies and their associated outcomes, we may gain valuable new insights into the neural mechanisms underlying this behaviour. The current study takes advantage of different beh ...
... surprise that identical conditions can yield different results from one subject to the next. By examining the different strategies and their associated outcomes, we may gain valuable new insights into the neural mechanisms underlying this behaviour. The current study takes advantage of different beh ...
Tuning Curve Shift by Attention Modulation in Cortical Neurons: a
... quantity is positive (negative), the shift is towards (away from) attention. In a few cases (Fig. 4C) we also tried systematically another measure of RF shift based on a Gaussian fit to ensure that our conclusions are not dependent on the particular measure of shift used. Specifically, we fitted a Gaus ...
... quantity is positive (negative), the shift is towards (away from) attention. In a few cases (Fig. 4C) we also tried systematically another measure of RF shift based on a Gaussian fit to ensure that our conclusions are not dependent on the particular measure of shift used. Specifically, we fitted a Gaus ...
Paying attention to consciousness - What is Neuro
... scious experience. The tactic of this paper is therefore initially to concentrate on attention and only afterwards explore how consciousness might arise from inside the resulting neural model of attention. We will be able to use the qualitative features of consciousness, mentioned under the first th ...
... scious experience. The tactic of this paper is therefore initially to concentrate on attention and only afterwards explore how consciousness might arise from inside the resulting neural model of attention. We will be able to use the qualitative features of consciousness, mentioned under the first th ...
The Physiology of the Senses Lecture 6 Visually Guided Actions
... foveal location and B to a less peripheral location. In V1 this is where B would have been coded were it visible. ...
... foveal location and B to a less peripheral location. In V1 this is where B would have been coded were it visible. ...
(2006) Changes in visual receptive fields with microstimulation of
... has been described in terms of its effect on the structure of receptive fields (RFs), where multiple stimuli compete to drive neural responses and ultimately behavior. We stimulated the frontal eye field (FEF) of passively fixating monkeys and produced changes in V4 responses similar to known effect ...
... has been described in terms of its effect on the structure of receptive fields (RFs), where multiple stimuli compete to drive neural responses and ultimately behavior. We stimulated the frontal eye field (FEF) of passively fixating monkeys and produced changes in V4 responses similar to known effect ...
supplemental figures
... Figure S15. Fano factor of the recorded neurons in olfactory task was correlated with sustained attention. (a) Trend of normalized fano factor in correct trials of all recorded neurons at the three TSI values aligned to the time from trigger. (b) Comparisons in fano factor among different time wind ...
... Figure S15. Fano factor of the recorded neurons in olfactory task was correlated with sustained attention. (a) Trend of normalized fano factor in correct trials of all recorded neurons at the three TSI values aligned to the time from trigger. (b) Comparisons in fano factor among different time wind ...
The relationship between executive function and attention in children
... the relationship of attention and dissociation in children. In extending this line of work, we made some methodological modifications. First, Becker-Blease and colleagues measured dissociation using a subscale of a trauma symptom checklist assessing absorption but not other symptoms of dissociation. ...
... the relationship of attention and dissociation in children. In extending this line of work, we made some methodological modifications. First, Becker-Blease and colleagues measured dissociation using a subscale of a trauma symptom checklist assessing absorption but not other symptoms of dissociation. ...
A Feedback Model of Visual Attention
... to multiplicatively modulate the synaptic strengths of inter-regional connections so that attended information can be selectively routed to higher cortical regions. Equivalent results can be achieved by using top-down signals to modulate the activity of neurons rather than weights of synapses (Salin ...
... to multiplicatively modulate the synaptic strengths of inter-regional connections so that attended information can be selectively routed to higher cortical regions. Equivalent results can be achieved by using top-down signals to modulate the activity of neurons rather than weights of synapses (Salin ...
Mechanisms of Visual Attention in the Human Cortex
... paired stimuli was reduced compared with that elicited by the single good stimulus. This result indicates that two stimuli present at the same time within a neuron’s RF are not processed independently, but rather that they interact with each other in a mutually suppressive way. This sensory suppress ...
... paired stimuli was reduced compared with that elicited by the single good stimulus. This result indicates that two stimuli present at the same time within a neuron’s RF are not processed independently, but rather that they interact with each other in a mutually suppressive way. This sensory suppress ...
The role of neuronal synchronization in selective attention
... change had occurred. This finding suggests that the processing or the signalling of a sensory change is more efficient when it is handled by an area that is engaged in enhanced gamma-band synchronization [6]. Importantly, the influence of local synchronization of behavioural responses was spatiall ...
... change had occurred. This finding suggests that the processing or the signalling of a sensory change is more efficient when it is handled by an area that is engaged in enhanced gamma-band synchronization [6]. Importantly, the influence of local synchronization of behavioural responses was spatiall ...
Modeling Visual Cognition
... The visual system has a limited number of processing resources, which must be allocated optimally when we encode visual stimuli. In Kyllingsbæk, Valla, Vanrie, and Bundesen (2007), we manipulated the spatial separation between several stimulus letters in whole report while keeping the eccentricity o ...
... The visual system has a limited number of processing resources, which must be allocated optimally when we encode visual stimuli. In Kyllingsbæk, Valla, Vanrie, and Bundesen (2007), we manipulated the spatial separation between several stimulus letters in whole report while keeping the eccentricity o ...
KISHORE Aswathy - School of Computing
... a simple coloured object, the brain stores information about it using what is called a ‘compositional representation’. Accordingly, different features of the object such as shape, texture and colour will be represented in different parts of the brain. Hence, in order to have a complete representatio ...
... a simple coloured object, the brain stores information about it using what is called a ‘compositional representation’. Accordingly, different features of the object such as shape, texture and colour will be represented in different parts of the brain. Hence, in order to have a complete representatio ...
The continuous performance test: a window on
... limbic system. The involvement of the limbic system as well as the medial and dorsolateral frontal cortex is seen as resulting from their respective inputs into the association areas, which in turn impact on the inferior parietal lobes to inhibit or facilitate attentional response. The posterior par ...
... limbic system. The involvement of the limbic system as well as the medial and dorsolateral frontal cortex is seen as resulting from their respective inputs into the association areas, which in turn impact on the inferior parietal lobes to inhibit or facilitate attentional response. The posterior par ...
Perception – Gain Control
... Eagle, D. M., & Robbins, T. W. (2003). Inhibitory control in rats performing a stop-signal reaction-time task: effects of lesions of the medial striatum and d-amphetamine. Behav Neurosci, 117(6), 1302-1317. Egner, T., Delano, M., & Hirsch, J. (2007). Separate conflict-specific cognitive control mech ...
... Eagle, D. M., & Robbins, T. W. (2003). Inhibitory control in rats performing a stop-signal reaction-time task: effects of lesions of the medial striatum and d-amphetamine. Behav Neurosci, 117(6), 1302-1317. Egner, T., Delano, M., & Hirsch, J. (2007). Separate conflict-specific cognitive control mech ...
mechanisms of visual attention in the human cortex
... paired stimuli was reduced compared with that elicited by the single good stimulus. This result indicates that two stimuli present at the same time within a neuron’s RF are not processed independently, but rather that they interact with each other in a mutually suppressive way. This sensory suppress ...
... paired stimuli was reduced compared with that elicited by the single good stimulus. This result indicates that two stimuli present at the same time within a neuron’s RF are not processed independently, but rather that they interact with each other in a mutually suppressive way. This sensory suppress ...
The Neural Fate of Consciously Perceived and Missed Events in the
... in high-level scene representations, the parahippocampal place area (PPA). This PPA activation was amplified when the stimulus was consciously perceived. By contrast, the frontal cortex was activated only when scenes were successfully reported. These results suggest that medial temporal cortex permi ...
... in high-level scene representations, the parahippocampal place area (PPA). This PPA activation was amplified when the stimulus was consciously perceived. By contrast, the frontal cortex was activated only when scenes were successfully reported. These results suggest that medial temporal cortex permi ...
The cognitive neuroscience of sustained attention
... Fig. 1. Schematic illustration of the major components of a neuronal network mediating sustained attention performance. The figure combines anatomical and functional relationships and represents a conceptual summary of the evidence from human neuropsychological and imaging studies and animal experim ...
... Fig. 1. Schematic illustration of the major components of a neuronal network mediating sustained attention performance. The figure combines anatomical and functional relationships and represents a conceptual summary of the evidence from human neuropsychological and imaging studies and animal experim ...
Attention maps in the brain - Site BU
... whether spatial attention could be split to simultaneously attend to multiple distinct objects or regions of space. James23 famously defined attention as ‘the taking possession by the mind, in clear and vivid form, of one out of what seem several simultaneous objects or trains of thought’. This unif ...
... whether spatial attention could be split to simultaneously attend to multiple distinct objects or regions of space. James23 famously defined attention as ‘the taking possession by the mind, in clear and vivid form, of one out of what seem several simultaneous objects or trains of thought’. This unif ...
chelazzi et al 2012 - Emergent Attention Lab
... search for a given item will increase its attentional priority, rendering it gradually more perceptually salient over consecutive trials. Consequently, when these objects with high priority are available among other stimuli, they will automatically attract attentional resources even when their selec ...
... search for a given item will increase its attentional priority, rendering it gradually more perceptually salient over consecutive trials. Consequently, when these objects with high priority are available among other stimuli, they will automatically attract attentional resources even when their selec ...
Attention
Attention is the behavioral and cognitive process of selectively concentrating on a discrete aspect of information, whether deemed subjective or objective, while ignoring other perceivable information. Attention has also been referred to as the allocation of limited processing resources.Attention remains a major area of investigation within education, psychology, neuroscience, cognitive neuroscience, and neuropsychology. Areas of active investigation involve determining the source of the sensory cues and signals that generate attention, the effects of these sensory cues and signals on the tuning properties of sensory neurons, and the relationship between attention and other behavioral and cognitive processes like working memory and vigilance. A relatively new body of research, which expands upon earlier research within neuropsychology, is investigating the diagnostic symptoms associated with traumatic brain injuries and their effects on attention. Attention also varies across cultures.The relationships between attention and consciousness are complex enough that they have warranted perennial philosophical exploration. Such exploration is both ancient and continually relevant, as it can have effects in fields ranging from mental health and the study of disorders of consciousness to artificial intelligence and its domains of research and development.