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Decoding Concurrent Representations of Pitch and Location in Auditory Working Memory.

Stefan Czoschke1,2, Cora Fischer1,2, Tara Bahador1,2

  • 1Institute of Medical Psychology, Medical Faculty, Goethe University, Frankfurt am Main 60528, Germany.

The Journal of Neuroscience : the Official Journal of the Society for Neuroscience
|April 13, 2021
PubMed
Summary
This summary is machine-generated.

This study shows that the brain can simultaneously store pitch and location information for sounds in working memory (WM). These auditory features are represented together in sensory and higher cortical areas, aiding feature integration.

Keywords:
auditorydecodingfunctional magnetic resonance imagingmultivariate pattern analysisworking memory

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Area of Science:

  • Neuroscience
  • Cognitive Neuroscience
  • Auditory Perception

Background:

  • Working memory (WM) research often focuses on single features, neglecting concurrent storage of multiple object attributes.
  • Auditory WM representations are less understood compared to visual WM.
  • The neural basis for integrating multiple features of a single auditory object in WM is unclear.

Purpose of the Study:

  • To investigate the concurrent neural representation of two distinct features (pitch and location) of a single auditory stimulus in working memory.
  • To determine if these features are maintained in separate or overlapping brain regions.
  • To explore the role of auditory cortex and higher-order brain regions in auditory feature integration within WM.

Main Methods:

  • Functional magnetic resonance imaging (fMRI) was used to decode hemodynamic signals during auditory working memory tasks.
  • Participants memorized both pitch and location of sounds and were cued to recall one feature.
  • Region of interest (ROI)-based decoding analyses were performed on fMRI data.

Main Results:

  • Both pitch and location of memorized sounds were decodable from auditory cortex and superior parietal lobule.
  • The superior parietal lobule showed higher decoding accuracy for location than pitch.
  • Location was also decodable from angular, supramarginal, and frontal gyri; pitch showed a trend in frontal regions.

Conclusions:

  • The brain concurrently stores multiple features of a single auditory object in working memory.
  • Auditory and parietal regions play a role in maintaining and potentially integrating these features.
  • Findings suggest representation formats that allow for feature integration within shared anatomical brain regions.