Correlation dimension changes accompanying the occurrence of the mismatch negativity and the P3 event-related potential component

Molnár, Mihály; Skinner, James E.; Csépe, Valéria; Winkler, István; Karmos, G.

doi:10.1016/0013-4694(95)00039-2

Cited by 70 publications

(20 citation statements)

References 37 publications

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“…A contribution of prefrontal neurons to MMN is also suggested by hemodynamic activity caused by stimulus changes and recorded with PET [Tervaniemi et al, 1999b] and fMRI [Celsis et al, 1999]. This frontal-MMN generator is also supported by the chaos analysis of the EEG following MMN-eliciting deviant sounds [Molná r et al, 1995], by MMN attenuation in patients with lesions of the dorsolateral prefrontal cortex [Alain et al, 1998;Alho et al, 1994] and by the MEG recordings of Levänen et al [1996] who reported in some of their subjects an additional frontal source contributing to MMNm. The dorsolateral prefrontal cortex has an important role in the control of the direction of auditory attention Knight et al, 1981].…”

Section: Cerebral Generators Of Mmn and P 3amentioning

confidence: 73%

Involuntary Attention and Distractibility as Evaluated with Event-Related Brain Potentials

Escera

Alho²,

Schröger³

et al. 2000

Audiol Neurotol

613

524

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This article reviews recent event-related brain potential (ERP) studies of involuntary attention and distractibility in response to novelty and change in the acoustic environment. These studies show that the mismatch negativity, N₁ and P_3a ERP components elicited by deviant or novel sounds in an unattended sequence of repetitive stimuli index different processes along the course to involuntary attention switch to distracting stimuli. These studies used new auditory-auditory and auditory-visual distraction paradigms, which enable one to assess objectively abnormal distractibility in several clinical patient groups, such as those suffering from closed-head injuries or chronic alcoholism.

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Section: Cerebral Generators Of Mmn and P 3amentioning

confidence: 73%

Involuntary Attention and Distractibility as Evaluated with Event-Related Brain Potentials

Escera

Alho²,

Schröger³

et al. 2000

Audiol Neurotol

613

524

View full text Add to dashboard Cite

show abstract

“…1 Second, in addition to its supratemporal generators, MMN appears to get a further contribution from the frontal lobe activity (Giard et al, 1990;Molnár, Skinner, Csépe, Winkler, & Karmos, 1995), a critical structure for controlling both voluntary and involuntary attention (Fuster, 1989). Third, the MMN tends to be accompanied, especially in the beginning of the stimulus sequence, by autonomous nervous system (ANS) responses even when stimulus change is of very small magnitude (Lyytinen, Blomberg, & Näätänen, 1992).…”

Section: Introductionmentioning

confidence: 99%

Neural Mechanisms of Involuntary Attention to Acoustic Novelty and Change

Escera

Alho

Winkler

et al. 1998

Journal of Cognitive Neuroscience

797

794

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Abstractn Behavioral and event-related brain potential (ERP) measures were used to elucidate the neural mechanisms of involuntary engagement of attention by novelty and change in the acoustic environment. The behavioral measures consisted of the reaction time (RT) and performance accuracy (hit rate) in a forcedchoice visual RT task where subjects were to discriminate between odd and even numbers. Each visual stimulus was preceded by an irrelevant auditory stimulus, which was randomly either a "standard" tone (80%), a slightly, higher "deviant" tone (10%), or a natural, "novel" sound (10%). Novel sounds prolonged the RT to successive visual stimuli by 17 msec as compared with the RT to visual stimuli that followed standard tones. Deviant tones, in turn, decreased the hit rate but did not signi cantly affect the RT. In the ERPs to deviant tones, the mismatch negativity (MMN), peaking at 150 msec, and a second negativity, peaking at 400 msec, could be observed. Novel sounds elicited an enhanced N1, with a probable overlap by the MMN, and a large positive P3a response with two different subcomponents: an early centrally dominant P3a, peaking at 230 msec, and a late P3a, peaking at 315 msec with a right-frontal scalp maximum. The present results suggest the involvement of two different neural mechanisms in triggering involuntary attention to acoustic novelty and change: a transient-detector mechanism activated by novel sounds and re ected in the N1 and a stimulus-change detector mechanism activated by deviant tones and novel sounds and re ected in the MMN. The observed differential distracting effects by slightly deviant tones and widely deviant novel sounds support the notion of two separate mechanisms of involuntary attention. n

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“…Molnar et al [31 ] used this approach when investigating the MMN and P3 ERP compo nents recorded at different scalp locations in normal healthy subjects. A new algorithm, the point correlation dimension (PD2) was used for the calculation of the dimensional com plexity of the EEG which outperforms the conventional procedures used for this purpose [32].…”

Section: M N As a M Easure Of Processing Differencesmentioning

confidence: 99%

Towards the Possible Clinical Application of the Mismatch Negativity Component of Event-Related Potentials

Csépe

Molnár

1997

Audiol Neurotol

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The mismatch negativity (MMN) is an event-related potential component that signifies neurophysiological processing of fine acoustic differences. The MMN indicates attention-independent change detection, reflects auditory sensory memory and provides a physiological measure of difference sensitivity. This paper will provide an overview of current research where results gained by MMN testing in different patient groups were central to the interpretation of an assumed abnormality of processing or storing acoustic features.

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Correlation dimension changes accompanying the occurrence of the mismatch negativity and the P3 event-related potential component

Cited by 70 publications

References 37 publications

Involuntary Attention and Distractibility as Evaluated with Event-Related Brain Potentials

Involuntary Attention and Distractibility as Evaluated with Event-Related Brain Potentials

Neural Mechanisms of Involuntary Attention to Acoustic Novelty and Change

Towards the Possible Clinical Application of the Mismatch Negativity Component of Event-Related Potentials

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