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Mismatch negativity on the cone of confusion.
Neurosci Lett. 2007 Mar 06; 414(2):178-82.NL

Abstract

Localization of sounds by the auditory system is based on the analysis of three sources of information: interaural level differences (ILD, caused by an attenuation of the sound as it travels to the more distant ear), interaural time differences (ITD, caused by the additional amount of time it takes for the sound to arrive at the more distant ear), and spectral cues (caused by direction-specific spectral filter properties of the pinnae). Although in a number of psychophysiological studies cortical processes of ITD and ILD analysis were investigated, there is hitherto no evidence on the cortical processing of spectral cues for sound localization. The objective of the present experiment was to test whether it is possible to observe electrophysiological correlates of sound localization based on spectral cues. In an auditory oddball experiment, 80 ms of broadband noise from varying free field locations were presented to inattentive participants. Mismatch negativities (MMNs) were observed for pairs of standards and location deviants located symmetrically with respect to the interaural axis. As interaural time and level differences are identical for such pairs of sounds, the observed MMNs most likely reflect cognitive processes of sound localization utilizing the spectral filter properties of the pinnae. MMN latencies suggest that sound localization based on spectral cues is slower than ITD- or ILD-based localization.

Authors+Show Affiliations

Technische Universität Berlin, Institute for Psychology and Ergonomics, Sekr. F7, Marchstrasse 12, 10587 Berlin, Germany. stefan.roettger@tu-berlin.deNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article

Language

eng

PubMed ID

17223265

Citation

Röttger, Stefan, et al. "Mismatch Negativity On the Cone of Confusion." Neuroscience Letters, vol. 414, no. 2, 2007, pp. 178-82.
Röttger S, Schröger E, Grube M, et al. Mismatch negativity on the cone of confusion. Neurosci Lett. 2007;414(2):178-82.
Röttger, S., Schröger, E., Grube, M., Grimm, S., & Rübsamen, R. (2007). Mismatch negativity on the cone of confusion. Neuroscience Letters, 414(2), 178-82.
Röttger S, et al. Mismatch Negativity On the Cone of Confusion. Neurosci Lett. 2007 Mar 6;414(2):178-82. PubMed PMID: 17223265.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Mismatch negativity on the cone of confusion. AU - Röttger,Stefan, AU - Schröger,Erich, AU - Grube,Manon, AU - Grimm,Sabine, AU - Rübsamen,Rudolf, Y1 - 2006/12/23/ PY - 2006/08/16/received PY - 2006/11/22/revised PY - 2006/12/14/accepted PY - 2007/1/16/pubmed PY - 2007/5/9/medline PY - 2007/1/16/entrez SP - 178 EP - 82 JF - Neuroscience letters JO - Neurosci Lett VL - 414 IS - 2 N2 - Localization of sounds by the auditory system is based on the analysis of three sources of information: interaural level differences (ILD, caused by an attenuation of the sound as it travels to the more distant ear), interaural time differences (ITD, caused by the additional amount of time it takes for the sound to arrive at the more distant ear), and spectral cues (caused by direction-specific spectral filter properties of the pinnae). Although in a number of psychophysiological studies cortical processes of ITD and ILD analysis were investigated, there is hitherto no evidence on the cortical processing of spectral cues for sound localization. The objective of the present experiment was to test whether it is possible to observe electrophysiological correlates of sound localization based on spectral cues. In an auditory oddball experiment, 80 ms of broadband noise from varying free field locations were presented to inattentive participants. Mismatch negativities (MMNs) were observed for pairs of standards and location deviants located symmetrically with respect to the interaural axis. As interaural time and level differences are identical for such pairs of sounds, the observed MMNs most likely reflect cognitive processes of sound localization utilizing the spectral filter properties of the pinnae. MMN latencies suggest that sound localization based on spectral cues is slower than ITD- or ILD-based localization. SN - 0304-3940 UR - https://www.unboundmedicine.com/medline/citation/17223265/Mismatch_negativity_on_the_cone_of_confusion_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0304-3940(06)01337-1 DB - PRIME DP - Unbound Medicine ER -