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Multiscale Investigations of Cortical Processing by Integrating Laminar Polytrodes and Optogenetics with Micro Electrocorticography in Rodents

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Published on: May 23, 2025

Texture coding in the whisker system.

Shantanu P Jadhav¹, Daniel E Feldman

¹W.M. Keck Center for Integrative Neuroscience and Department of Physiology, University of California at San Francisco, 94143, USA.

Current Opinion in Neurobiology

|March 20, 2010

Summary

This summary is machine-generated.

Rodents detect surface texture through whisker movements, encoding roughness via firing rates and slip-evoked signals in the somatosensory cortex (S1). This research advances our understanding of tactile sensation and neural coding.

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Published on: March 30, 2016

Area of Science:

Neurobiology
Sensory Systems
Somatosensation

Background:

The whisker somatosensory system in rodents is a key model for studying sensation.
Recent research explores how tactile features are detected and encoded in the somatosensory cortex (S1).

Purpose of the Study:

To summarize progress on the detection of surface texture (roughness) using rodent whiskers.
To elucidate the neural mechanisms underlying texture perception.

Main Methods:

Analysis of whisker micromotion statistics during surface exploration.
Electrophysiological recording and analysis of neural activity in the somatosensory cortex (S1).

Main Results:

Texture is inferred from whisker micromotion statistics, specifically mean speed or high-velocity slips.
Mean firing rate in S1 encodes mean speed, while synchronous spike volleys encode slips.
An alternative model of place coding via whisker resonance is less supported.

Conclusions:

Rodent whisker-based texture detection relies on processing whisker micromotion statistics.
Neural encoding in S1 involves both mean firing rate and sparse, synchronous spike volleys.
The study clarifies neural mechanisms for tactile roughness perception.