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Updated: Jul 17, 2025
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Non-Invasive Modulation and Robotic Mapping of Motor Cortex in the Developing Brain
Published on: July 1, 2019
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Rule-based modulation of a sensorimotor transformation across cortical areas
Biorxiv : the Preprint Server for Biology
|September 4, 2023
Summary
The brain uses preparatory neural activity in motor areas to flexibly switch between rules for responding to sensory cues. This allows for adaptive behavior in changing environments.
Area of Science:
- Neuroscience
- Cognitive Neuroscience
- Sensory Processing
Background:
- Flexible behavioral responses to changing environmental rules are crucial for survival.
- The neural mechanisms underlying rule encoding and its influence on sensory-guided behavior remain largely unknown.
Approach:
- Single-unit recordings were performed in mice during a cross-modal sensory selection task.
- Mice switched between tactile-to-motor and visual-to-motor rules in different trial blocks.
- Neural activity was analyzed across sensorimotor areas, including S1, S2, MM, and ALM.
Key Points:
- Neuronal activity in sensorimotor areas distinguished between rules before and during stimulus presentation.
- Pre-stimulus population activity in motor areas (ALM, MM) decoded the current task rule.
- Disrupting pre-stimulus activity in ALM and MM impaired task performance, supporting the role of preparatory states.
Conclusions:
- Motor cortical preparatory states are configured in a rule-dependent manner to guide sensory processing.
- Flexible action selection relies on the configuration of these preparatory neural states in the motor cortex.
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