Abstract
Uncovering the principle of neural coding is essential for understanding how our mysterious brain works. Recent studies have reported the laminar differences of alpha-beta and gamma rhythms in the sensory cortex, yet it remains unclear about the underlying function role of frequency-dependent interlaminar interactions in neural coding. Using a rate-based network model to simulate the cortical laminar under the external time-varying stimuli, we showed that the physiological specificity of rhythms for layers enables the cortical laminae to preferentially encode information in different frequency ranges. The interplay of the supragranular layer and infragranular layer contributes significantly to improving the neural representation of external time-varying input at the population level. Further investigations revealed the essential role of recurrent connections of the cortical laminae in regulating the population rate coding. In particular, the laminar network optimally encodes the time-varying input at intermediate strengths of intralaminar excitatory–inhibitory circuits and interlaminar connections. Additionally, we verified the crucial role of adaptation in improving population coding by introducing slow dynamics and suppressing the noise-like excitatory activity in the laminar network. These findings highlight the crucial role of frequency-dependent interlaminar interactions in encoding time-varying stimuli and may shed light on the underlying function of cortical structural specificity in neural information processing.
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The datasets generated during and/or analyzed during the current study are available from the corresponding author on reasonable request.
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Funding
This work is partly supported by National Natural Science Foundation of China (Grant Nos.31771149 and 61933003) and is partly supported by Sichuan Science and Technology Program (Grant No. 2018HH0003). Note that the data have been presented previously in abstract from [54] .
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Wu, S., Cao, H., Zhang, G. et al. Layer-specific population rate coding in a local cortical model with a laminar structure. Nonlinear Dyn 109, 1107–1121 (2022). https://doi.org/10.1007/s11071-022-07461-z
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DOI: https://doi.org/10.1007/s11071-022-07461-z