Neural mechanisms of involuntary attention to acoustic novelty and change

Carles Escera, Kimmo Alho, I. Winkler, Risto Näätänen

Research output: Contribution to journalArticle

599 Citations (Scopus)

Abstract

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 forced-choice visual RT task where subjects were to discriminate between odd and even numbers. Each visual stimulus was preceded bp 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 significantly 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 probably 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 reflected in the N1 and a stimulus-change detector mechanism activated by deviant tunes and novel sounds and reflected 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.

Original languageEnglish
Pages (from-to)590-604
Number of pages15
JournalJournal of Cognitive Neuroscience
Volume10
Issue number5
DOIs
Publication statusPublished - 1998

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Acoustics
Reaction Time
Scalp
Evoked Potentials
Brain

ASJC Scopus subject areas

  • Behavioral Neuroscience
  • Experimental and Cognitive Psychology
  • Cognitive Neuroscience

Cite this

Neural mechanisms of involuntary attention to acoustic novelty and change. / Escera, Carles; Alho, Kimmo; Winkler, I.; Näätänen, Risto.

In: Journal of Cognitive Neuroscience, Vol. 10, No. 5, 1998, p. 590-604.

Research output: Contribution to journalArticle

Escera, Carles ; Alho, Kimmo ; Winkler, I. ; Näätänen, Risto. / Neural mechanisms of involuntary attention to acoustic novelty and change. In: Journal of Cognitive Neuroscience. 1998 ; Vol. 10, No. 5. pp. 590-604.
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