Advertisement

Paired Tone Presentation Enhances Responses of Human Auditory Cortex to Rare Frequency Changes

  • Josi Rif
  • Riitta Hari
  • Jari Tiihonen

Abstract

An ‘oddball paradigm’, where monotonously repeated ‘standard’ sounds are randomly replaced by physically different ‘deviants’, has been recently used in several neuromagnetic studies. For example, a rare change in tone frequency evokes a special response, ‘mismatch field’ (MMF), with the source area close to that of the 100-ms response (N100m) to stimulus onset (Hari et al., 1984; Sams et al., 1985). The functional relation between the sources of N100m and MMF is still an unsolved question.

Keywords

Current Dipole Oddball Paradigm Equivalent Current Dipole Equivalent Dipole Paired Tone 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. Hari, R., Hämäläinen, M., Ilmoniemi, R., Kaukoranta, E., Reinikainen, K., Salminen, J., Alho, K., Näätänen, R., and Sams, M., 1984, Responses of the primary auditory cortex to pitch changes in a sequence of tone pips: neuromagnetic recordings in man, Neurosci. Lett., 50:127.PubMedCrossRefGoogle Scholar
  2. Knuutila, J., Ahlfors, S., Ahonen, A., Hällström, J., Kajola, M., Lounasmaa, OV., Vilkman, V., and Tesche, C., 1987, A large-area low noise seven-channel DC SQUID magnetometer for brain research, Rev. Sci. Instr., 58:2145.CrossRefGoogle Scholar
  3. Lounasmaa, O.V., Hari, R., Joutsiniemi, S-I., and Hämäläinen, M., 1989, Multi-SQUID recordings of human cerebral magnetic fields may give information about memory processes, Europhys. Lett., 9:603.CrossRefGoogle Scholar
  4. Loveless, N., Hari, R., Hämäläinen, M., Tiihonen, J., 1989, Evoked responses of human auditory cortex may be enchanced by preceding stimuli, Electroenceph. Clin. Neurophysiol., 74:217.PubMedCrossRefGoogle Scholar
  5. Näätänen, R. and Picton, T., 1987, The N1 wave of the human electric and magnetic response to sound: a review and an analysis of the component structure, Psychophysiol., 24:375.CrossRefGoogle Scholar
  6. Sams, M., Hämäläinen, M., Anervo, A., Kaukoranta, E., Reinikainen, L., Hari, R., 1985, Cerebral neuromagnetic responses evoked by short auditory stimuli, Electroenceph. clin. Neurophysiol., 61:245.CrossRefGoogle Scholar

Copyright information

© Plenum Press, New York 1989

Authors and Affiliations

  • Josi Rif
    • 1
  • Riitta Hari
    • 1
  • Jari Tiihonen
    • 1
  1. 1.Low Temperature LaboratoryHelsinki University of TechnologyEspooFinland

Personalised recommendations