Topography and source analysis of brain activity associated with selective spatial attention and memory search

Wijers, A.A.; Mulder, G.; Hooff, H van; Lange, Jozarni J. Dlabac-de; Peters, M.J.; Dunajski, Z.

doi:10.1007/bf01128695

Cited by 12 publications

(3 citation statements)

References 8 publications

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“…is still relatively low when based on 30 to 40 channels. Thus, for the relatively simple dipole models we used, the localization error is much less a problem and previous studies have been successful in estimating relatively simple dipole models using about 30 channels~e.g., Heslenfeld et al, 1997;Kenemans, Baas, Mangun, Lijffijt, & Verbaten, 2000;Lange, Wijers, Mulder, & Mulder, 1998Wijers, Lange, Mulder, & Mulder, 1997;Wijers, van Hooff, Lange, Peters, & Dunajski, 1993!.…”

Section: Dipole Analysismentioning

confidence: 99%

Nonspatial intermodal selective attention is mediated by sensory brain areas: Evidence from event‐related potentials

Talsma¹,

Kok²

2001

Psychophysiology

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The present study focuses on the question of whether inter-and intramodal forms of attention are reflected in activation of the same or different brain areas. ERPs were recorded while subjects were presented a random sequence of visual and auditory stimuli. They were instructed to attend to nonspatial attributes of either auditory or visual stimuli and to detect occasional target stimuli within the attended channel. An occipital selection negativity was found for intramodal attention to visual stimuli. Visual intermodal attention was also manifested in a similar negativity. A symmetrical dipole pair in the medial inferior occipital areas could account for the intramodal effects. Dipole pairs for the intermodal attention effect had a slightly more posterior location compared to the dipole pair for the intramodal effect. Auditory intermodal attention was manifested in an early enhanced negativity overlapping with the N1 and P2 components, which was localized using a symmetrical dipole pair in the lateral auditory cortex. The onset of the intramodal attention effect was somewhat later~around 200 ms!, and was reflected in a frontal processing negativity. The present results indicate that intra-and intermodal forms of attention were indeed similar for visual stimuli. Auditory data suggest the involvement of multiple brain areas. Descriptors: Nonspatial attention, Intermodal attention, ERPs, Scalp topography, Source localizationSelective attention can be seen as a collection of hierarchical filters see Hansen & Hillyard, 1983;Heslenfeld, 1998! that provide various levels of selection. The first of these levels selects information among the sensory modalities, such as the visual, auditory, or tactile modality. At the dimensional level, a given stimulus dimension, such as spatial location, color, orientation~visual modality! pitch or intensity~auditory! is selected from the relevant modality, and at the feature level one particular feature, such as a given color~e.g., the color purple! is selected from the currently selected dimension. Based on this model, one could argue that selection of a relevant modality would precede the selection of relevant stimuli within the attended modality.Recent studies have questioned such a strict hierarchy, however. Is has been shown, for example, that the judgment of the location of auditory stimuli is improved by the presence of a structured visual field~Platt & Warren, 1972!, whereas discrepant visual information causes gross errors in auditory location~a phenomenon known as the "ventriloquist" effect; Pick, Warren, & Hay, 1969!. In addition, Eimer and Schröger~1998! have demonstrated the presence of location relevance for both visual and auditory stimuli, which not only existed when presented to the attended modality, but also when these stimuli were presented to a modality which was not attended~i.e., visual stimuli presented when attention was directed to auditory stimuli!.The present article focuses on the question of whether or not nonspatial forms of intermodal attention...

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Section: Dipole Analysismentioning

confidence: 99%

Nonspatial intermodal selective attention is mediated by sensory brain areas: Evidence from event‐related potentials

Talsma¹,

Kok²

2001

Psychophysiology

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“…The frontal N1 wave reverses its polarity in multiple sclerosis, and this is interpreted as a consequence of demyelination of the fronto-occipital neurons (Gonzalez-Rosa et al 2006). In spite of the clear distinction between the two wave components, many studies have only addressed the N1b wave (Heinze et al 1990;Wijers et al 1993Wijers et al , 1997Talsma & Kok 2002;Wang & Kameda 2005;Fu et al 2008).…”

Section: Introductionmentioning

confidence: 99%

“…In spite of the clear distinction between the two wave components, many studies have only addressed the N1b wave (Heinze et al . 1990; Wijers et al . 1993, 1997; Talsma & Kok 2002; Wang & Kameda 2005; Fu et al .…”

Section: Introductionmentioning

confidence: 99%

Visual perception and frontal lobe in intellectual disabilities: a study with evoked potentials and neuropsychology

Muñoz‐Ruata

Caro-Martínez²,

Perez

et al. 2010

J intellect Disabil Res

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The systematic correlations, produced by the target stimulus in perceptual abilities tasks, with the N1a (frontal) and not with N1b (posterior), suggest that the visual perception process involves frontal participation. These correlations support the idea that the N1a and N1b are not equivalent. The relationship between frontal functions and early stages of visual perception is revised and discussed, as well as the frontal contribution with the neuropsychological tests used. A possible relationship between the frontal activity dysfunction in ID and perceptive problems is suggested. Perceptive alteration observed in persons with ID could indeed be because of altered sensory areas, but also to a failure in the frontal participation of perceptive processes conceived as elaborations inside reverberant circuits of perception-action.

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An Electrophysiological Analysis of Altered Cognitive Functions in Huntington Disease

Münte

Ridao-Alonso²,

Preinfalk³

et al. 1997

Archives of Neurology

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The results suggest marked impairments of patients with HD in early visual sensory processing (early components). Deficits in visual search might be attributed to an impairment to deploy attentional resources across the visual field and/or an inability to control eye movements. The ERPs in the memory task differed grossly from similar data obtained by others in patients with Alzheimer disease, suggesting a different neural basis for the amnesia in HD.

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Topography and source analysis of brain activity associated with selective spatial attention and memory search

Cited by 12 publications

References 8 publications

Nonspatial intermodal selective attention is mediated by sensory brain areas: Evidence from event‐related potentials

Nonspatial intermodal selective attention is mediated by sensory brain areas: Evidence from event‐related potentials

Visual perception and frontal lobe in intellectual disabilities: a study with evoked potentials and neuropsychology

An Electrophysiological Analysis of Altered Cognitive Functions in Huntington Disease

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