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Learning-induced changes of auditory receptive fields

N M Weinberger1

  • 1Center for the Neurobiology of Learning and Memory, Bonney Center, University of California, Irvine 92717-3800.

Current Opinion in Neurobiology
|August 1, 1993
PubMed
Summary
This summary is machine-generated.

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Classical conditioning rapidly and specifically alters auditory cortex receptive fields to favor a tone's frequency. This brain plasticity, potentially involving muscarinic receptors, can be long-lasting and occurs even under anesthesia.

Area of Science:

  • Neuroscience
  • Auditory Neuroscience
  • Neuroplasticity

Background:

  • Auditory receptive fields in the brain process sound frequencies.
  • Classical conditioning is a form of associative learning.
  • Understanding the mechanisms of auditory plasticity is crucial for neuroscience research.

Purpose of the Study:

  • To investigate how classical conditioning affects receptive fields in auditory cortical areas.
  • To determine the specificity and characteristics of this learned plasticity.
  • To explore potential neural mechanisms, including thalamic involvement.

Main Methods:

  • Classical conditioning paradigms were applied to auditory stimuli.
  • Receptive field properties of auditory cortical neurons were measured.

Related Experiment Videos

  • Investigated plasticity under different physiological conditions (e.g., anesthesia).

    • Main Results:

    • Classical conditioning induced specific receptive field modifications in primary and secondary auditory cortices.
    • Tuning shifts favored the conditioned tone frequency.
    • Plasticity was rapid, associative, specific, and maintained long-term, even under anesthesia.
    • Non-lemniscal thalamic nuclei also showed receptive field plasticity.

    Conclusions:

    • Classical conditioning drives significant and specific neuroplasticity in the auditory cortex.
    • This plasticity involves rapid, enduring changes in frequency tuning.
    • Thalamic nuclei may play a role in supporting cortical auditory plasticity.