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Articles by Xiaomo Chen
Selective control of prefrontal neural timescales by parietal cortex - Nature Communications
Abstract The frontal eye field (FEF) and posterior parietal cortex (PPC) are key hubs of the dorsal attention network, yet how parietal inputs shape prefrontal circuit temporal dynamics and attentional computations remains largely unknown. We measured intrinsic timescales of FEF neurons in male rhesus macaques and examined their changes during PPC inactivation.
Dependence of contextual modulation in macaque V1 on interlaminar signal flow
eLife Assessment The results by Zhu et al provide valuable insights into the representation of border ownership in area V1. They used neuropixel recording to demonstrate the clustering of border ownership, and compared cross-correlation functions between neurons in different layers to demonstrate that they depend on the type of stimulus.
Selective control of prefrontal neural timescales by parietal cortex
Abstract Intrinsic neural timescales quantify how long a pattern of spontaneous neuronal activity persists, thereby capturing the dynamics of its endogenous fluctuations over time. We measured the intrinsic timescales of frontal eye field (FEF) neurons and examined their changes during posterior parietal cortex (PPC) inactivation. We observed two distinct classes of FEF neurons, those with short (~25ms) or long (~100ms) timescales.
Posterior parietal cortex regulates neural timescales and stimulus-driven attentional modulation in the prefrontal cortex
Abstract Intrinsic neural timescales characterize the dynamics of endogenous fluctuations in neural activity. We measured the intrinsic timescales of prefrontal neurons and examined their changes during posterior parietal cortex (PPC) inactivation.
Posterior Parietal Cortex Regulates Intrinsic Neural Timescales and Attentional Processing in Frontal Eye Field
Abstract Intrinsic neural timescales characterize the dynamics of endogenous fluctuations in neural activity. We measured the intrinsic timescales of frontal eye field (FEF) neurons and examined changes during posterior parietal cortex (PPC) inactivation. FEF neurons exhibit a bimodal distribution of intrinsic timescales, with shorter timescale neurons processing rapid visual information and longer timescale neurons more involved in sustained attentional modulation.
Dependence of Contextual Modulation in Macaque V1 on Interlaminar Signal Flow
Abstract In visual cortex, neural correlates of subjective perception can be generated by modulation of activity from beyond the classical receptive field (CRF). In macaque V1, activity generated by nonclassical receptive field (nCRF) stimulation involves different intracortical circuitry than activity generated by CRF stimulation, suggesting that interactions between neurons across V1 layers differ under CRF and nCRF stimulus conditions.
Parietal Cortex Regulates Visual Salience and Salience-Driven Behavior
Highlights • Reversible inactivation of PPC reduces contralateral visual exploration and choices • PPC inactivation selectively reduces the coding of salience by prefrontal neurons • Encoding of salience by prefrontal LFPs is selectively reduced by PPC inactivation • PPC inactivation diminishes the influence of salience on eye movements Summary Unique stimuli stand out.
Inactivation of Medial Frontal Cortex Changes Risk Preference
(Current Biology 28, 3114–3122.e1–e4; October 8, 2018) It has come to our attention that this article’s STAR Methods section did not contain details regarding the monkey’s training and pain management, as recommended by the ARRIVE guidelines. This missing information, which does not affect our results or conclusions, has now been added in the article online. The authors apologize for the oversight. Article Info IDENTIFICATION DOI: 10.1016/j.cub.2018.10.062 Copyright © 2018 The Author(s).
Inactivation of Medial Frontal Cortex Changes Risk Preference
In general, two-tailed t tests were used for statistical tests, unless specified otherwise. Trial-by-trial data was collected during control and inactivation. We quantified the monkeys’ risk behavior using two types of risk models: risk-value models and prospective theory models. All reported p values regarding mean differences between control and inactivation conditions are results of two-tailed paired t tests. p values relating to gamble history effects are based on one-tailed paired t tests.
Dissonant Representations of Visual Space in Prefrontal Cortex during Eye Movements
Visual Spatial Information in FEF LFPs Is Differentially Distributed across Frequency Bands Alpha and High-Gamma RFs Are Retinocentrically Organized during Fixation and Spatially Correlated with Spiking Activity and Each Other RFs and Spatial Information from Alpha- and High-Gamma-Band and Spiking Activities Were Robust across Cortical Layers Dissociation of Alpha and High-Gamma RFs during Eye Movements Distribution of Visual Spatial Information across the LFP Spectrum in Prefrontal Cortex...
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