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Updated: Mar 1, 2026

Morphological and Functional Evaluation of Ribbon Synapses at Specific Frequency Regions of the Mouse Cochlea
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Population coding for visual and auditory quantity in human numerotopic maps.

Garam Jeong1, Joram Soch2, Robert Trampel3

  • 1Research Group Learning in Early Childhood, Max Planck Institute for Human Cognitive and Brain Sciences, Leipzig, Germany.

Communications Biology
|February 27, 2026
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Summary
This summary is machine-generated.

Scientists found a universal coding scheme for visual and auditory quantity processing in the human brain. This discovery reveals how the brain processes numerical information across different senses, aiding survival.

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Last Updated: Mar 1, 2026

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Area of Science:

  • Neuroscience
  • Cognitive Science
  • Sensory Processing

Background:

  • Neural populations extract quantitative information across senses for survival.
  • Understanding cross-sensory quantity encoding is limited.

Purpose of the Study:

  • Identify an overarching coding scheme for visual and auditory numerosity in humans.
  • Investigate the neural basis of multisensory numerical information processing.

Main Methods:

  • Utilized high-field functional magnetic resonance imaging (7 Tesla) in humans.
  • Employed a neurobiologically plausible model informed by electrophysiological data.

Main Results:

  • Discovered hemodynamic responses showing logarithmic Gaussian tuning to numerosity in both visual and auditory domains.
  • Identified topographically organized numerotopic maps for both visual and auditory quantity.
  • Located visual maps in association cortices and auditory maps in superior temporal and premotor cortices.

Conclusions:

  • The human brain employs a shared coding scheme for visual and auditory numerosity.
  • This finding illuminates the multisensory foundations of numerical processing.
  • Opens new research directions for cross-species, cross-modal quantity detection.