PMID- 17223265
OWN - NLM
STAT- MEDLINE
DCOM- 20070508
LR  - 20070223
IS  - 0304-3940 (Print)
IS  - 0304-3940 (Linking)
VI  - 414
IP  - 2
DP  - 2007 Mar 6
TI  - Mismatch negativity on the cone of confusion.
PG  - 178-82
AB  - 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.
FAU - Rottger, Stefan
AU  - Rottger S
AD  - Technische Universitat Berlin, Institute for Psychology and Ergonomics, Sekr. F7, 
      Marchstrasse 12, 10587 Berlin, Germany. stefan.roettger@tu-berlin.de
FAU - Schroger, Erich
AU  - Schroger E
FAU - Grube, Manon
AU  - Grube M
FAU - Grimm, Sabine
AU  - Grimm S
FAU - Rubsamen, Rudolf
AU  - Rubsamen R
LA  - eng
PT  - Journal Article
DEP - 20061223
PL  - Ireland
TA  - Neurosci Lett
JT  - Neuroscience letters
JID - 7600130
SB  - IM
MH  - Acoustic Stimulation
MH  - Auditory Pathways/*physiology
MH  - Auditory Threshold/physiology
MH  - Brain/*physiology
MH  - Cognition/physiology
MH  - Confusion/etiology/*psychology
MH  - Cues
MH  - Evoked Potentials/*physiology
MH  - Functional Laterality/*physiology
MH  - Humans
MH  - Neural Pathways/physiology
MH  - Orientation
MH  - Reaction Time/physiology
MH  - Sound Localization/*physiology
MH  - Space Perception/physiology
EDAT- 2007/01/16 09:00
MHDA- 2007/05/09 09:00
CRDT- 2007/01/16 09:00
PHST- 2006/08/16 00:00 [received]
PHST- 2006/11/22 00:00 [revised]
PHST- 2006/12/14 00:00 [accepted]
PHST- 2007/01/16 09:00 [pubmed]
PHST- 2007/05/09 09:00 [medline]
PHST- 2007/01/16 09:00 [entrez]
AID - S0304-3940(06)01337-1 [pii]
AID - 10.1016/j.neulet.2006.12.023 [doi]
PST - ppublish
SO  - Neurosci Lett. 2007 Mar 6;414(2):178-82. doi: 10.1016/j.neulet.2006.12.023. Epub 
      2006 Dec 23.