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Author Spotlight: Investigating the Impact of Emotional Prosodies on Voice Recognition and Perception

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Probing sensorimotor memory through the human speech-audiomotor system.

Nishant Rao^1,2, David J Ostry^1,2

¹Yale Child Study Center, Yale School of Medicine, Yale University, New Haven, Connecticut, United States.

Journal of Neurophysiology

|December 31, 2024

Summary

This summary is machine-generated.

Human speech-motor learning shows strong retention over time. Two parallel memory modes coexist, switching based on auditory feedback, demonstrating distinct sensorimotor memory systems.

Keywords:

auditory perception contextual memory retrieval implicit adaptation speech memory retention speech motor learning

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Area of Science:

Neuroscience
Cognitive Science
Speech Science

Background:

Human sensorimotor learning is primarily studied using limb movements in a visuospatial context.
The speech-auditory system offers a unique, functionally independent workspace for studying sensorimotor memory.

Purpose of the Study:

To investigate the retention and characteristics of speech-acoustical sensorimotor memory.
To determine if speech-motor memory is functionally independent of visuospatial memory.

Main Methods:

Adaptation to altered auditory feedback was used to assess speech-acoustical memory.
Memory durability was tested after 8- and 24-hour delays.
Memory retrieval was examined under conditions with and without auditory feedback.

Main Results:

Extensive retention of speech-motor learning (around 70%) was observed.
Speech-acoustical memory was insensitive to the method of acquisition (abrupt vs. gradual).
Two parallel speech production modes (adapted and habitual) coexist and can be rapidly switched via auditory feedback.

Conclusions:

The human speech-auditory system serves as a distinct workspace for characterizing sensorimotor memory.
Speech-motor learning exhibits extensive persistence and context-specific retrieval.
These findings suggest functional independence between speech-auditory and visuospatial sensorimotor memory systems.