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Related Experiment Video

Updated: Aug 14, 2025

A Lateralized Odor Learning Model in Neonatal Rats for Dissecting Neural Circuitry Underpinning Memory Formation
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Learning-Induced Odor Modulation of Neuronal Activity in Auditory Cortex.

Omri David Gilday1, Adi Mizrahi2,3

  • 1The Edmond and Lily Safra Center for Brain Sciences, The Hebrew University of Jerusalem, Jerusalem 91904, Israel.

The Journal of Neuroscience : the Official Journal of the Society for Neuroscience
|January 17, 2023
PubMed
Summary

Mice learn to associate odors with sounds, using these olfactory cues to predict auditory trials. This learning alters neural activity in the auditory cortex (ACx), demonstrating early multisensory integration in the brain.

Keywords:
auditory cortexbehaviorexpectationmultisensorytwo-photon

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Area of Science:

  • Neuroscience
  • Sensory Processing
  • Auditory Cortex Research

Background:

  • Sensory cortices exhibit multisensory interactions, not purely unisensory processing.
  • Experience shapes how disparate sensory information becomes behaviorally relevant.

Purpose of the Study:

  • To investigate how learned odor-sound associations impact neural activity in the auditory cortex (ACx).
  • To explore the role of olfactory cues in modulating auditory discrimination and expectation in mice.

Main Methods:

  • Developed a novel auditory discrimination task for mice using olfactory cues to manipulate trial expectations.
  • Employed two-photon calcium imaging to record single-neuron activity in the ACx during the task.
  • Analyzed behavioral performance and neural responses in relation to learned odor-sound associations.

Main Results:

  • Female mice learned to exploit odor-mediated expectations for decision-making in a auditory task.
  • Olfactory cues induced significant modulation of neuronal activity in the ACx, correlating with behavioral effects.
  • Neural activity modulation varied based on individual cell response preferences, with some consistent with predictive coding.

Conclusions:

  • Learning novel odor-sound associations induces changes in the auditory cortex (ACx).
  • Behaviorally relevant multisensory environments can mediate contextual effects as early as the auditory cortex.
  • These findings suggest early integration of olfactory and auditory information in the sensory cortex following learning.