Diverse Neuronal Activity in Barrel Cortex During Self-Grooming and Whisking in Mice

Area of Science:

• Neuroscience
• Sensory Processing
• Motor Control

Background:

• The primary somatosensory barrel cortex (S1BF) is crucial for sensory perception and sensorimotor feedback.
• Understanding single-neuron activity during complex behaviors like self-grooming and whisking is essential but remains challenging.
• Distinct activation patterns of S1BF neurons during sensory and motor processing require further investigation.

Purpose of the Study:

• To investigate whether S1BF neurons exhibit distinct activation patterns during self-grooming and whisking.
• To identify and characterize neuron types based on their activity during these specific behaviors at the single-cell level.

Main Methods:

• Utilized miniature two-photon imaging (mini-2P) to monitor calcium transients in S1BF neurons.
• Recorded neuronal activity during self-grooming and exploratory whisking behaviors in rodents.
• Classified neurons based on their temporal activation patterns relative to behavioral events.

Main Results:

• Identified four distinct neuron types: initiation-specific (GIA, WIA) and sustained-response (GDA, WDA).
• GDA neurons were active during both self-grooming and whisking.
• WIA and WDA neurons exhibited whisking-specific activity, being inactive during self-grooming.

Conclusions:

• The S1BF displays differential neuronal responses during self-grooming and whisking.
• Specific neuronal populations within the S1BF are tuned to distinct aspects of sensory and motor information processing.
• These findings contribute to understanding the neural basis of complex sensorimotor behaviors.