Auditory cortical activity drives feedback-dependent vocal control in marmosets.

Area of Science:

• Neuroscience
• Animal Behavior
• Auditory Processing

Background:

• Vocal communication relies on auditory self-monitoring for error correction.
• Human speech production rapidly adapts to altered auditory feedback.
• The precise function of the auditory cortex in vocal feedback control remains unclear.

Purpose of the Study:

• To investigate the role of the auditory cortex in feedback-dependent vocal control.
• To examine neural activity in the auditory cortex during vocal self-monitoring.
• To determine if the auditory cortex causally influences vocal production.

Main Methods:

• Recorded neural activity in the auditory cortex of marmoset monkeys during vocalization.
• Manipulated auditory feedback to observe vocal compensatory changes.
• Used electrical microstimulation of the auditory cortex to assess its causal impact on vocalizations.

Main Results:

• Marmosets demonstrate feedback control of vocal acoustics, mirroring human responses.
• Auditory cortex neuronal activity correlates with compensatory vocal adjustments.
• Electrical microstimulation of the auditory cortex elicits rapid vocal changes.

Conclusions:

• The auditory cortex plays a causal role in vocal self-monitoring and feedback-dependent control.
• Findings provide insights into the neural mechanisms underlying vocal production.
• This research has implications for understanding human speech motor control.