Chapter 7 part two
... location in absence of stimulus, and level of activity is related to level of attention so it could bias earlier areas. Ventromedial areas maintain activity during active attention to objects. Bloodflow studies provide best evidence, but need good designs to be convincing. Best control is exogenous ...
... location in absence of stimulus, and level of activity is related to level of attention so it could bias earlier areas. Ventromedial areas maintain activity during active attention to objects. Bloodflow studies provide best evidence, but need good designs to be convincing. Best control is exogenous ...
Spatial Spread Measurements in HR 90K users
... • Symmetric biphasic pulses, pulse width of 32 μs (cathodic pulse first) • Stimuli were given at patient’s Most Comfortable Level • Two-sided exponential decay curve • Width values at 80% of the peak of each fitted curve ...
... • Symmetric biphasic pulses, pulse width of 32 μs (cathodic pulse first) • Stimuli were given at patient’s Most Comfortable Level • Two-sided exponential decay curve • Width values at 80% of the peak of each fitted curve ...
Difficulty (part of the hypothesis)
... Motivation: Attention related areas show similar responses to attentional tasks. We would like to know how FEF and IPS play functionally distinct roles. ...
... Motivation: Attention related areas show similar responses to attentional tasks. We would like to know how FEF and IPS play functionally distinct roles. ...
bcs513_lecture_week9_class1
... possession by the mind in clear and vivid form, of one out of what seem several simultaneously possible objects or trains of thought...It implies withdrawal from some things in order to deal effectively with others, and is a condition which has a real opposite in the confused, dazed, scatterbrained ...
... possession by the mind in clear and vivid form, of one out of what seem several simultaneously possible objects or trains of thought...It implies withdrawal from some things in order to deal effectively with others, and is a condition which has a real opposite in the confused, dazed, scatterbrained ...
Summary
... In chapter 3 we investigated the relation between the coding of attention and reward in area V1 with a curve-tracing task where we varied the amounts of reward associated with the curves. Similar to previous studies (Platt & Glimcher 1999; Leon & Shadlen 1999; Ikeda & Hikosaka 2003; Sugrue et al 20 ...
... In chapter 3 we investigated the relation between the coding of attention and reward in area V1 with a curve-tracing task where we varied the amounts of reward associated with the curves. Similar to previous studies (Platt & Glimcher 1999; Leon & Shadlen 1999; Ikeda & Hikosaka 2003; Sugrue et al 20 ...
Document
... pinholes and holding them in exact coincidence, and yet at the same time he can concentrate his attention on any part of the dark field he likes, so that when the spark comes, he will get an impression about objects in that particular region only. In this experiment the attention is entirely indepen ...
... pinholes and holding them in exact coincidence, and yet at the same time he can concentrate his attention on any part of the dark field he likes, so that when the spark comes, he will get an impression about objects in that particular region only. In this experiment the attention is entirely indepen ...
Chapter 6: Summary and Discussion
... propose that the propagation of enhanced responses in early visual cortex (including V1) can explain the spread of attention the psychological level of description. In chapter 3 we investigated the relation between the coding of attention and reward in area V1 with a curve-tracing task where we vari ...
... propose that the propagation of enhanced responses in early visual cortex (including V1) can explain the spread of attention the psychological level of description. In chapter 3 we investigated the relation between the coding of attention and reward in area V1 with a curve-tracing task where we vari ...
The Cerebral Association Cortex
... known as the attentional blink, that is we behave as if our eyes are closed while attention is processing an object. Attention can be drawn from below by things that pop out from the background. In early visual areas, like or similar objects are inhibited and have a reduced influence while different ...
... known as the attentional blink, that is we behave as if our eyes are closed while attention is processing an object. Attention can be drawn from below by things that pop out from the background. In early visual areas, like or similar objects are inhibited and have a reduced influence while different ...
Are We Paying Attention Yet?
... Attention and eye movements are tightly related During saccade preparation, oculomotor system controls location selection even if attention is directed elsewhere Direction of attention is dissociable from eye position during fixations Findings are do not rule out interdependence or identity hypothes ...
... Attention and eye movements are tightly related During saccade preparation, oculomotor system controls location selection even if attention is directed elsewhere Direction of attention is dissociable from eye position during fixations Findings are do not rule out interdependence or identity hypothes ...
1. What different types of attention exist? Name and describe at least
... 1. What different types of attention exist? Name and describe at least four types of attention. Exogenous or bottom-up attention: type of attention associated with sensory stimuli “popping out” of the background withouth cognitive input, e.g., a flash of light in the darkness, a loud sound in quietn ...
... 1. What different types of attention exist? Name and describe at least four types of attention. Exogenous or bottom-up attention: type of attention associated with sensory stimuli “popping out” of the background withouth cognitive input, e.g., a flash of light in the darkness, a loud sound in quietn ...
11 Attention
... Concentrate on one object in visual field B. Selectively attend to information (while ignoring other information) C. Preferential processing of sensory information Attention-deficit hyperactivity disorder Demonstrates critical nature of intact attentional mechanisms Brain imaging studies Show that c ...
... Concentrate on one object in visual field B. Selectively attend to information (while ignoring other information) C. Preferential processing of sensory information Attention-deficit hyperactivity disorder Demonstrates critical nature of intact attentional mechanisms Brain imaging studies Show that c ...
The Integrative Role of Posterior Parietal Cortex and related Clinical S
... We will present to follow some disturbs related to the deficit in the spatial cognition or on the use of that as an aid to some other superior function (language, spatial orientation, attention orientation, etc.). The accurate correlation between each one of those syndromes and the subjacent anatomi ...
... We will present to follow some disturbs related to the deficit in the spatial cognition or on the use of that as an aid to some other superior function (language, spatial orientation, attention orientation, etc.). The accurate correlation between each one of those syndromes and the subjacent anatomi ...
Slide 1
... May be that attentional mechanisms can modulate the responses of MT neurons more effectively with reference to a combination of direction and space (Treue and Maunsell) than to space alone (this study) • Feature-based attentional mechanisms (direction of motion as feature) may contribute to the a ...
... May be that attentional mechanisms can modulate the responses of MT neurons more effectively with reference to a combination of direction and space (Treue and Maunsell) than to space alone (this study) • Feature-based attentional mechanisms (direction of motion as feature) may contribute to the a ...
E(R) - Consciousness Online
... Limited explanatory power In natural behavior, attention and eye movements are not directly rewarded Attentional decisions are endogenous, even when they support behavioral goals. LIP/FEF neurons encode covertly attended objects. ...
... Limited explanatory power In natural behavior, attention and eye movements are not directly rewarded Attentional decisions are endogenous, even when they support behavioral goals. LIP/FEF neurons encode covertly attended objects. ...
Localization of Cognitive Operations
... used cues to direct attention covertly to areas of the visual field without eye movements (15). Attention is measured by changes in the efficiency of processing targets at the cued location in comparison with other uncued locations in the visual field. These studies have found systematic deficits in ...
... used cues to direct attention covertly to areas of the visual field without eye movements (15). Attention is measured by changes in the efficiency of processing targets at the cued location in comparison with other uncued locations in the visual field. These studies have found systematic deficits in ...
The neural mechanisms of top- down attentional control
... of hemodynamic activity15 correlated with distinct aspects of complex-task performance. Here we used event-related fMRI methods to determine which brain regions were involved in attentional-control processes and to distinguish these from areas involved in subsequent selective processing of target st ...
... of hemodynamic activity15 correlated with distinct aspects of complex-task performance. Here we used event-related fMRI methods to determine which brain regions were involved in attentional-control processes and to distinguish these from areas involved in subsequent selective processing of target st ...
21 June 2001
... is in principle comparable and functionally homologous in both species, directly coding space for action. Methods Clinical investigation Patients were classified as having spatial neglect when they showed the typical clinical behaviour such as spontaneous deviation of the head and eyes toward the ip ...
... is in principle comparable and functionally homologous in both species, directly coding space for action. Methods Clinical investigation Patients were classified as having spatial neglect when they showed the typical clinical behaviour such as spontaneous deviation of the head and eyes toward the ip ...
Visual and oculomotor selection: links, causes and
... Figure 2. Microstimulation of the SC. Two recent studies examined the effect of subthreshold SC microstimulation (left) on covert spatial attention. (a) One study used a change-blindness task in which monkeys were trained to detect peripheral changes in a visual display. During each trial the animal ...
... Figure 2. Microstimulation of the SC. Two recent studies examined the effect of subthreshold SC microstimulation (left) on covert spatial attention. (a) One study used a change-blindness task in which monkeys were trained to detect peripheral changes in a visual display. During each trial the animal ...
2320Lecture20
... • Posner and colleagues – Use cue-target paradigm to investigate attentional abilities of parietal lesion patients – Prediction: stimuli in ipsilesional field always faster than stimuli in contralesional field and cues don’t matter ...
... • Posner and colleagues – Use cue-target paradigm to investigate attentional abilities of parietal lesion patients – Prediction: stimuli in ipsilesional field always faster than stimuli in contralesional field and cues don’t matter ...
Neural coding of behavioral relevance in parietal cortex
... dots, when they were directed in advance to attend to the appropriate or inappropriate patch. Withdrawing attention from the stimulus decreased the animals’ ability to detect the change in motion coherence, and also reduced neuronal responses in MT and VIP. Interestingly, the changes in neuronal res ...
... dots, when they were directed in advance to attend to the appropriate or inappropriate patch. Withdrawing attention from the stimulus decreased the animals’ ability to detect the change in motion coherence, and also reduced neuronal responses in MT and VIP. Interestingly, the changes in neuronal res ...
2320lecture22
... Disorders of Orienting • Lesions to parietal cortex can produce some strange behavioural consequences – patients fail to notice events on the contralesional side – Patients behave as if they are blind in the contralesional hemifield but they are not blind ...
... Disorders of Orienting • Lesions to parietal cortex can produce some strange behavioural consequences – patients fail to notice events on the contralesional side – Patients behave as if they are blind in the contralesional hemifield but they are not blind ...
The Physiology of the Senses Lecture 5
... processing such as face recognition and geometry. It excels in tasks that are spatial or intuitive, (C resembles O as I resembles L), and music. Although one side may dominate for a particular function, recent evidence suggests that the other cortex is also activated, although less, in the same func ...
... processing such as face recognition and geometry. It excels in tasks that are spatial or intuitive, (C resembles O as I resembles L), and music. Although one side may dominate for a particular function, recent evidence suggests that the other cortex is also activated, although less, in the same func ...
Background Presentation
... Visual Attention • Attention is the ability to select objects of interest from the surrounding environment • A reliable measure of attention is eye movement during object (target) selection • Early studies show that there are specific brain regions that are involved in the process of target selecti ...
... Visual Attention • Attention is the ability to select objects of interest from the surrounding environment • A reliable measure of attention is eye movement during object (target) selection • Early studies show that there are specific brain regions that are involved in the process of target selecti ...
Attention
... tasks. Discuss how attention can alter the speed of visual processing, assuming attention to visual objects does not have a direct effect on visual transduction or motor coding. 7. Explain the concept of shifting attention. Discuss the effects on the brain of shifting attention from one task to ano ...
... tasks. Discuss how attention can alter the speed of visual processing, assuming attention to visual objects does not have a direct effect on visual transduction or motor coding. 7. Explain the concept of shifting attention. Discuss the effects on the brain of shifting attention from one task to ano ...
Eagleman Ch 8. Attention and Consciousness
... Hemineglect: A Disorder of Attention and Awareness The attentional deficit covers multiple sensory modalities Pointing out the deficits to the patient does not help resolve the problem for more than a brief time. The unattended stimuli do activate the primary sensory cortices, but the activatio ...
... Hemineglect: A Disorder of Attention and Awareness The attentional deficit covers multiple sensory modalities Pointing out the deficits to the patient does not help resolve the problem for more than a brief time. The unattended stimuli do activate the primary sensory cortices, but the activatio ...
