Cognitive Neuroscience of Attention 1

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Components of Attention: Setting arousal level, detecting efficiency
Tonic/Vigilant Attention
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Attention in the absence of body movements
Covert
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Attention depending on one's own intentional goal
Endogenous
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Posner, Nissen and Ogden (1978) found...
Covert attention towards cued stimulus = fast reaction time
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Spatial attention enhances activity of...
ERPs in occipital areas
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Selective attention enhances the activity of... (Moran and Desimone, 1985)
single cells
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Covert attention to peripheral location in anticipation of a stimulus = activity in... (Corbatta and Shulman, 2002)
Parietal and frontal cortex
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Brain structures responsible for visual attention and eye movement - largely overlapping activity (Corbatta et al, 1998)
parieto-frontal brain structures
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Top-down dorsal frontoparietal network
frontal eye field, intraparietal sulcus/superior parietal lobe
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Stimulus-driven ventral frontoparietal network
temporoparietal junctions, ventral frontal cortex
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Duncan, 1984 found...
Poor performance when perceiving similar attributes belonging to different objects - attention deals with one object at a time
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Which is correct... (Mueller and Kleinschmidt, 2003)
Object representation can modulate spatial attention - faster a processing uncued stimuli if it is represented within the same location as cued stimuli
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Neglect patients have a lesion of the...
Partietal/frontal lobe
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Unawareness/denial of illness
Anosagnosia
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Neglect Syndrome is...
A deficit of spatial attention causing problems in perceiving and responding to stimulation on one side
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Extinction is the characteristic where...
there is an impaired performance for contralateral side when ipsilateral information is simultaneously presented
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Common places for lesions which leads to Neglect Syndrome
right inferior-parietal cortex
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"Delayed responses for neglected side when attentional focus is opposite"
Posner et al, 1984
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Three stages in Model Attention: components of visual-spatial attention
Engage attention > Disengage attention > Shift attention between locations
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When cue and target were presented in the .... RTs were .... when an attentional shift to the .... was required
Ipsilesional, Delay, Contralesional
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Card 2

Front

Attention in the absence of body movements

Back

Covert

Card 3

Front

Attention depending on one's own intentional goal

Back

Preview of the front of card 3

Card 4

Front

Posner, Nissen and Ogden (1978) found...

Back

Preview of the front of card 4

Card 5

Front

Spatial attention enhances activity of...

Back

Preview of the front of card 5
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