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Working memory is thought to result from sustained neuron spiking. However, computational models suggest complex dynamics with discrete oscillatory bursts. We analyzed local field potential (LFP) and spiking from the prefrontal cortex (PFC) of monkeys performing a working memory task. There were brief bursts of narrow-band gamma oscillations (45–100 Hz), varied in time and frequency, accompanying encoding and re-activation of sensory information. They appeared at a minority of recording sites associated with spiking reflecting the to-be-remembered items. Beta oscillations (20–35 Hz) also occurred in brief, variable bursts but reflected a default state interrupted by encoding and decoding. Only activity of neurons reflecting encoding/decoding correlated with changes in gamma burst rate. Thus, gamma bursts could gate access to, and prevent sensory interference with, working memory. This supports the hypothesis that working memory is manifested by discrete oscillatory dynamics and spiking, not sustained activity.

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Herman, Pawel -  Lundqvist, Lars Mikael -  Rose, Jonas -  Brincat, Scott Louis -  Buschman, Timothy J -  Miller, Earl K - 

Id.: 70434427

Versión: 1.0

Estado: Final

Tipo de recurso: Article  -  http://purl.org/eprint/type/JournalArticle  - 

Tipo de Interactividad: Expositivo

Nivel de Interactividad: muy bajo

Audiencia: Estudiante  -  Profesor  -  Autor  - 

Estructura: Atomic

Coste: no

Copyright: sí

: Creative Commons Attribution-NonCommercial-NoDerivs License

Requerimientos técnicos:  Browser: Any - 

Relación: [IsBasedOn] PMC
[References] http://dx.doi.org/10.1016/J.NEURON.2016.02.028
[References] Neuron

Fecha de contribución: 19-nov-2017


* 0896-6273
* 1097-4199
* Lundqvist, Mikael et al. “Gamma and Beta Bursts Underlie Working Memory.” Neuron 90, 1 (April 2016): 152–164 © 2016 Elsevier Inc

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