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Multi-structure Cortical States Deduced From Intracellular Representations of Fixed Tactile Input Patterns
Johanna Norrlid1, Jonas M D Enander1, Hannes Mogensen1
1Neural Basis of Sensorimotor Control, Department of Experimental Medical Science, Lund University, Lund, Sweden.
Frontiers in Cellular Neuroscience
|July 1, 2021
Summary
The brain
Area of Science:
- Neuroscience
- Sensory Processing
- Computational Neuroscience
Background:
- The brain's internal activity shapes sensory perception.
- Understanding how external stimuli interact with internal brain states is crucial.
Purpose of the Study:
- To investigate the interaction between reproducible tactile inputs and neocortical neuron activity.
- To characterize how internal brain dynamics influence sensory processing.
Main Methods:
- Intracellular recordings from rat neocortical neurons.
- Application of reproducible, time-varying touch-related sensory inputs.
- Analysis of synaptic responses to repeated tactile stimulation.
Main Results:
- Synaptic responses to identical tactile inputs varied significantly.
- Responses sorted into specific, neuron-unique, time-evolving patterns.
- Response patterns were dependent on local subnetwork states, not global cortical state.
- Recurrent response types suggest a non-continuous solution landscape for tactile inputs.
Conclusions:
- Sensory inputs and internal brain dynamics interact to select perceptual attractor states.
- Neuron-specific response types indicate subnetworks represent components of these attractor states.
- Cortical internal states offer richer resolution of external input impact than previously understood.
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