Dynamic perceptual feature selectivity in primary somatosensory cortex upon reversal learning.

Area of Science:

• Neuroscience
• Sensory processing
• Perceptual learning

Background:

• Neurons in the primary sensory cortex encode stimulus features during perceptual learning.
• The stability of this acquired stimulus selectivity in different contexts is not well understood.

Purpose of the Study:

• To investigate the stability of neuronal stimulus selectivity in the primary somatosensory cortex during changes in reward contingencies.
• To identify how behavioral context influences neuronal activity and learning.

Main Methods:

• Monitoring the activity of individual neurons in the mouse primary somatosensory cortex.
• Tracking neuronal stimulus selectivity before and after altering reward-based texture discrimination rules.

Main Results:

• Identified stable and dynamic neuronal populations representing texture or behavioral choice.
• Discovered a subpopulation of value-sensitive neurons regaining texture selectivity based on reward value.
• Observed that value-sensitive neurons predict learning onset with transient activity increases.

Conclusions:

• Neuronal stimulus selectivity during perceptual learning is dynamic and context-dependent.
• Behavioral contingencies significantly shape stimulus representation in primary sensory cortex neurons.
• The findings highlight the adaptive nature of sensory cortex representations in response to learning and reward value.