Uniqueness Of The Generators Of Brain Evoked Potential Maps

Amir, Muhammad; Jewett,

doi:10.1109/iembs.1992.592753

Cited by 4 publications

(5 citation statements)

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“…Specifically, if the shape of two scalp distributions differs, then the configurations of the underlying neural generators must differ~Nunez, 1981; Srebro, 1996!. Note that the converse does not necessarily hold because distinct source configurations can produce scalp distributions with the same shape~e.g., Amir, 1994!. The standard method to compare the shape of scalp fields entails performing an ANOVA on the normalized amplitude of difference ERPs. Differences in the shape of the scalp distributions are then captured by the interaction between electrode and condition~McCarthy & Wood, 1985!, which for the analyses herein refers to time window.…”

Section: Difference Wave Analysesmentioning

confidence: 99%

Neurophysiological evidence for visual perceptual categorization of words and faces within 150 ms

1998

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The nature and early time course of the initial processing differences between visually matched linguistic and nonlinguistic images were studied with event-related potentials (ERPs). The first effect began at 90 ms when ERPs to written words diverged from other objects, including faces. By 125 ms, ERPs to words and faces were more positive than those to other objects, effects identified with the P150. The amplitude and scalp distribution of P150s to words and faces were similar. The P150 seemed to be elicited selectively by images resembling any well-learned category of visual patterns. We propose that (a) visual perceptual categorization based on long-term experience begins by 125 ms, (b) P150 amplitude varies with the cumulative experience people have discriminating among instances of specific categories of visual objects (e.g., words, faces), and (c) the P150 is a scalp reflection of letterstring and face intracranial ERPs in posterior fusiform gyrus.

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Section: Difference Wave Analysesmentioning

confidence: 99%

Neurophysiological evidence for visual perceptual categorization of words and faces within 150 ms

1998

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“…The rationale for this hypothesis is that the information processing in each state is carried out by one or more brain centers being active and when the brain enters into another micro-state these brain centers may become inactive while the information is relayed to newly activated brain centers. Consequently, as the centers are localized within the brain, each center is likely to produce a different EP topography while being active (Amir, 1994). This is reflected in the observation from several studies that the topography of an EP is usually quasi-stable for several milliseconds, before it rapidly changes into a new stable EP topography (Brandeis and Lehmann, 1989;Katayama et al, 2007;Kinoshita et al, 1995;Koenig and Lehmann, 1996;Kondakor et al, 1997;Lehmann, 1984;Lehmann et al, 2005;Michel et al, 1992;PascualMarqui et al, 1995;Strelets et al, 2003;Strik and Lehmann, 1993;Wackermann et al, 1993).…”

Section: Introductionmentioning

confidence: 93%

An automated method for micro-state segmentation of evoked potentials

Hennings

Lelic

Petrini

2009

Journal of Neuroscience Methods

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“…The simple case in which the source is represented by a finite number of dipoles is studied in Refs. [1,9,12,14], and in this case, the problem is reduced to a problem of parameter identification in finite dimension.…”

Section: Introductionmentioning

confidence: 99%

“…The analysis of inverse problem for the case of volumetric sources has been done in works [1,3,7,9,12,14], and the case of cortical sources in Refs. [4][5][6].…”

Section: Introductionmentioning

confidence: 99%