Auditory discrimination learning differentially modulates neural representation in auditory cortex subregions and...

Area of Science:

• Neuroscience
• Auditory Neuroscience
• Systems Neuroscience

Background:

• Auditory cortex (ACtx) neural responses change during learning.
• The specific alterations in ACtx subregions and their interactions during auditory learning remain unclear.

Purpose of the Study:

• To investigate how learning modifies neural responses across different ACtx subregions.
• To understand the changes in functional connectivity between ACtx areas during auditory learning.

Main Methods:

• Developed an automated training and widefield imaging system for longitudinal tracking of mouse ACtx neural activity.
• Utilized a tone discrimination task to study auditory learning.

Main Results:

• Primary ACtx responses were consistently informative of learned stimuli and behavioral outcomes.
• Representations of behavioral outcomes and learned stimuli were enhanced in higher-order ACtx fields with training.
• Inter-regional correlations between primary and higher-order ACtx areas increased during learning.
• ACtx response changes varied across stimuli and synchronized with the learning rate.

Conclusions:

• Auditory learning induces region-specific modulations within the ACtx.
• Functional connections between ACtx subregions are altered by learning.
• Behavioral information is propagated from primary to higher-order ACtx areas during learning.