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Vocal Error Monitoring in the Primate Auditory Cortex.

Steven J Eliades¹, Joji Tsunada^2,3

¹Department of Head and Neck Surgery & Communication Sciences, Duke University School of Medicine, Durham, North Carolina 27710 steven.eliades@duke.edu.

The Journal of Neuroscience : the Official Journal of the Society for Neuroscience

|July 11, 2025

Summary

This summary is machine-generated.

Scientists found neural activity in the auditory cortex that monitors vocal errors. This brain region tracks how much vocal feedback differs from predictions, aiding in vocal control.

Keywords:

auditory cortex error signal primate sensory-motor integration vocal production vocalization

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Area of Science:

Neuroscience
Auditory Neuroscience
Motor Control

Background:

Sensory-motor control relies on integrating and monitoring behavioral feedback.
Self-monitoring involves comparing predicted sensory consequences with actual feedback, generating error signals.
While proposed for speech, direct evidence for vocal error signals in the auditory cortex is limited.

Purpose of the Study:

To investigate the presence and nature of vocal error signals in the auditory cortex.
To determine if auditory cortex activity reflects vocal feedback errors.
To explore the neural mechanisms underlying auditory feedback processing during vocalization.

Main Methods:

Recorded neural activity from the auditory cortex of nonhuman primates during vocalization.
Introduced real-time auditory feedback errors using frequency shifts.
Analyzed neural responses in relation to the magnitude and direction of feedback errors.

Main Results:

Found neural activity that scaled with the magnitude of vocal feedback errors.
Observed feedback sensitivity exceeding passive sensory responses and specific to vocal frequencies.
Demonstrated that feedback responses predicted subsequent vocal adjustments.
Identified both unit-level and population-level encoding of vocal error signals.

Conclusions:

The auditory cortex encodes vocal feedback error magnitude and direction.
Neural mechanisms for vocal error monitoring exist at both individual neuron and population levels.
These findings provide evidence for auditory cortex involvement in real-time vocal feedback-dependent control.