Neural Comput - Predicting single-neuron activity in locally connected networks.

Tópicos

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Resumo

The characterization of coordinated activity in neuronal populations has received renewed interest in the light of advancing experimental techniques that allow recordings from multiple units simultaneously. Across both in vitro and in vivo preparations, nearby neurons show coordinated responses when spontaneously active and when subject to external stimuli. Recent work (Truccolo, Hochberg, & Donoghue, 2010 ) has connected these coordinated responses to behavior, showing that small ensembles of neurons in arm-related areas of sensorimotor cortex can reliably predict single-neuron spikes in behaving monkeys and humans. We investigate this phenomenon using an analogous point process model, showing that in the case of a computational model of cortex responding to random background inputs, one is similarly able to predict the future state of a single neuron by considering its own spiking history, together with the spiking histories of randomly sampled ensembles of nearby neurons. This model exhibits realistic cortical architecture and displays bursting episodes in the two distinct connectivity schemes studied. We conjecture that the baseline predictability we find in these instances is characteristic of locally connected networks more broadly considered.

Resumo Limpo

character coordin activ neuron popul receiv renew interest light advanc experiment techniqu allow record multipl unit simultan across vitro vivo prepar nearbi neuron show coordin respons spontan activ subject extern stimuli recent work truccolo hochberg donoghu connect coordin respons behavior show small ensembl neuron armrel area sensorimotor cortex can reliabl predict singleneuron spike behav monkey human investig phenomenon use analog point process model show case comput model cortex respond random background input one similar abl predict futur state singl neuron consid spike histori togeth spike histori random sampl ensembl nearbi neuron model exhibit realist cortic architectur display burst episod two distinct connect scheme studi conjectur baselin predict find instanc characterist local connect network broad consid

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