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Pre-attentive and attentive processing of temporal and frequency characteristics within long sounds.
Brain Res Cogn Brain Res. 2005 Dec; 25(3):711-21.BR

Abstract

Attention effects on the processing of deviations in the duration and the frequency dimension of a long sound were investigated in three conditions: (1) when auditory stimuli were ignored, (2) when they were attended and frequency dimension was task-relevant, and (3) when they were attended and duration dimension was task-relevant. The mismatch negativity (MMN) of the event-related potential (ERP) to infrequent shortenings of a sound (600 ms vs. 1000 ms) and to infrequent frequency modulations at one of nine possible intervals within the sound (change from 440 Hz to 480 Hz and back to 440 Hz, e.g. in the 600-650 ms interval) was measured. Duration MMN was slightly enhanced when directing attention towards the frequency dimension but notably enhanced when attention was focused on duration. The early phase of frequency-modulated MMN was of equal amplitude in all three conditions, and the late phase was equally enlarged in both attend conditions. Interestingly, MMN to frequency-modulated deviants decreased the later the deviation occurred within the sound; there was no indication for an MMN being present in Ignore condition when frequency modulations occurred 400 ms after sound onset or later. Thus, with increasing temporal distance between the onset of a sound and the onset of a deviation within the sound (e.g. frequency modulation or sound offset), MMN for frequency modulations and duration shortenings decreases. This suggests that the initial part of a sound (approximately 300 ms) contributes more to the unitary sound representation underlying MMN than the later parts.

Authors+Show Affiliations

Kognitive einschl. Biologische Psychologie, Institut für Psychologie I, Universität Leipzig, Seeburgstr. 14-20, 04103 Leipzig, Germany. grimms@uni-leipzig.deNo affiliation info available

Pub Type(s)

Clinical Trial
Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

16253485

Citation

Grimm, Sabine, and Erich Schröger. "Pre-attentive and Attentive Processing of Temporal and Frequency Characteristics Within Long Sounds." Brain Research. Cognitive Brain Research, vol. 25, no. 3, 2005, pp. 711-21.
Grimm S, Schröger E. Pre-attentive and attentive processing of temporal and frequency characteristics within long sounds. Brain Res Cogn Brain Res. 2005;25(3):711-21.
Grimm, S., & Schröger, E. (2005). Pre-attentive and attentive processing of temporal and frequency characteristics within long sounds. Brain Research. Cognitive Brain Research, 25(3), 711-21.
Grimm S, Schröger E. Pre-attentive and Attentive Processing of Temporal and Frequency Characteristics Within Long Sounds. Brain Res Cogn Brain Res. 2005;25(3):711-21. PubMed PMID: 16253485.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Pre-attentive and attentive processing of temporal and frequency characteristics within long sounds. AU - Grimm,Sabine, AU - Schröger,Erich, Y1 - 2005/10/25/ PY - 2005/02/02/received PY - 2005/09/02/revised PY - 2005/09/02/accepted PY - 2005/10/29/pubmed PY - 2006/2/16/medline PY - 2005/10/29/entrez SP - 711 EP - 21 JF - Brain research. Cognitive brain research JO - Brain Res Cogn Brain Res VL - 25 IS - 3 N2 - Attention effects on the processing of deviations in the duration and the frequency dimension of a long sound were investigated in three conditions: (1) when auditory stimuli were ignored, (2) when they were attended and frequency dimension was task-relevant, and (3) when they were attended and duration dimension was task-relevant. The mismatch negativity (MMN) of the event-related potential (ERP) to infrequent shortenings of a sound (600 ms vs. 1000 ms) and to infrequent frequency modulations at one of nine possible intervals within the sound (change from 440 Hz to 480 Hz and back to 440 Hz, e.g. in the 600-650 ms interval) was measured. Duration MMN was slightly enhanced when directing attention towards the frequency dimension but notably enhanced when attention was focused on duration. The early phase of frequency-modulated MMN was of equal amplitude in all three conditions, and the late phase was equally enlarged in both attend conditions. Interestingly, MMN to frequency-modulated deviants decreased the later the deviation occurred within the sound; there was no indication for an MMN being present in Ignore condition when frequency modulations occurred 400 ms after sound onset or later. Thus, with increasing temporal distance between the onset of a sound and the onset of a deviation within the sound (e.g. frequency modulation or sound offset), MMN for frequency modulations and duration shortenings decreases. This suggests that the initial part of a sound (approximately 300 ms) contributes more to the unitary sound representation underlying MMN than the later parts. SN - 0926-6410 UR - https://www.unboundmedicine.com/medline/citation/16253485/Pre_attentive_and_attentive_processing_of_temporal_and_frequency_characteristics_within_long_sounds_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0926-6410(05)00262-4 DB - PRIME DP - Unbound Medicine ER -