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Behavioral/Systems/Cognitive

Controlling Bursting in Cortical Cultures with Closed-Loop Multi-Electrode Stimulation

Daniel A. Wagenaar, Radhika Madhavan, Jerome Pine and Steve M. Potter
Journal of Neuroscience 19 January 2005, 25 (3) 680-688; DOI: https://doi.org/10.1523/JNEUROSCI.4209-04.2005
Daniel A. Wagenaar
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Radhika Madhavan
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Jerome Pine
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Steve M. Potter
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Abstract

One of the major modes of activity of high-density cultures of dissociated neurons is globally synchronized bursting. Unlike in vivo, neuronal ensembles in culture maintain activity patterns dominated by global bursts for the lifetime of the culture (up to 2 years). We hypothesize that persistence of bursting is caused by a lack of input from other brain areas. To study this hypothesis, we grew small but dense monolayer cultures of cortical neurons and glia from rat embryos on multi-electrode arrays and used electrical stimulation to substitute for afferents. We quantified the burstiness of the firing of the cultures in spontaneous activity and during several stimulation protocols. Although slow stimulation through individual electrodes increased burstiness as a result of burst entrainment, rapid stimulation reduced burstiness. Distributing stimuli across several electrodes, as well as continuously fine-tuning stimulus strength with closed-loop feedback, greatly enhanced burst control. We conclude that externally applied electrical stimulation can substitute for natural inputs to cortical neuronal ensembles in transforming burst-dominated activity to dispersed spiking, more reminiscent of the awake cortex in vivo. This nonpharmacological method of controlling bursts will be a critical tool for exploring the information processing capacities of neuronal ensembles in vitro and has potential applications for the treatment of epilepsy.

  • bursting
  • dissociated culture
  • cortex
  • epilepsy
  • distributed stimulation
  • multi-electrode array
  • deep brain stimulation
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The Journal of Neuroscience: 25 (3)
Journal of Neuroscience
Vol. 25, Issue 3
19 Jan 2005
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Controlling Bursting in Cortical Cultures with Closed-Loop Multi-Electrode Stimulation
Daniel A. Wagenaar, Radhika Madhavan, Jerome Pine, Steve M. Potter
Journal of Neuroscience 19 January 2005, 25 (3) 680-688; DOI: 10.1523/JNEUROSCI.4209-04.2005

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Controlling Bursting in Cortical Cultures with Closed-Loop Multi-Electrode Stimulation
Daniel A. Wagenaar, Radhika Madhavan, Jerome Pine, Steve M. Potter
Journal of Neuroscience 19 January 2005, 25 (3) 680-688; DOI: 10.1523/JNEUROSCI.4209-04.2005
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