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From objective to subjective: pitch representation in the human auditory cortex

I Winkler1, M Tervaniemi, M Huotilainen

  • 1Department of Psychophysiology, Hungarian Academy of Sciences, Budapest.

Neuroreport
|November 27, 1995
PubMed
Summary

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The brain forms subjective pitch perception from objective sound features before auditory memory storage. This pitch change detection and memory likely occur in the auditory cortex.

Area of Science:

  • Neuroscience
  • Auditory Perception
  • Cognitive Science

Background:

  • The mismatch response (MMR) is a brain signal indicating detection of infrequent auditory changes.
  • Understanding how the brain forms and stores auditory features like pitch is crucial for cognitive neuroscience.

Purpose of the Study:

  • To investigate the neural basis of pitch perception and its representation in auditory sensory memory.
  • To determine if pitch deviation detection and memory storage involve the auditory cortex.

Main Methods:

  • Magnetoencephalography (MEG) was used to record magnetic brain responses.
  • Complex sounds with infrequent pitch changes were presented to participants.
  • Stimuli were designed to elicit the mismatch response only if perceived pitch was in memory.

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Main Results:

  • Subjective pitch perception is formed from objective spectral parameters before acoustic memory storage.
  • Pitch deviation was detected within the auditory cortex, indicated by magnetic brain responses.
  • Evidence suggests pitch memory may also be located in the auditory cortex.

Conclusions:

  • The auditory cortex processes objective sound features to create subjective pitch representations.
  • The auditory cortex is a likely location for both the detection of pitch deviations and the storage of pitch information in memory.