On High-Frequency Field Oscillations ( 100 Hz) and the Spectral Leakage of Spiking Activity

Scheffer-Teixeira, Robson; Belchior, Hindiael; Leão, Richardson Naves; Ribeiro, Sidarta Tollendal Gomes; Tort, Adriano Bretanha Lopes

On High-Frequency Field Oscillations ( 100 Hz) and the Spectral Leakage of Spiking Activity

Página do item simplificado Estatísticas

dc.contributor.author	Scheffer-Teixeira, Robson
dc.contributor.author	Belchior, Hindiael
dc.contributor.author	Leão, Richardson Naves
dc.contributor.author	Ribeiro, Sidarta Tollendal Gomes
dc.contributor.author	Tort, Adriano Bretanha Lopes
dc.date.accessioned	2017-05-31T17:01:21Z
dc.date.available	2017-05-31T17:01:21Z
dc.date.issued	2013-01-23
dc.description.resumo	Recent reports converge to the idea that high-frequency oscillations in local field potentials (LFPs) represent multiunit activity. In particular, the amplitude of LFP activity above 100 Hz—commonly referred to as “high-gamma” or “epsilon” band—was found to correlate with firing rate. However, other studies suggest the existence of true LFP oscillations at this frequency range that are different from the well established ripple oscillations. Using multisite recordings of the hippocampus of freely moving rats, we show here that high-frequency LFP oscillations can represent either the spectral leakage of spiking activity or a genuine rhythm, depending on recording location. Both spike-leaked, spurious activity and true fast oscillations couple to theta phase; however, the two phenomena can be clearly distinguished by other key features, such as preferred coupling phase and spectral signatures. Our results argue against the idea that all high-frequency LFP activity stems from spike contamination and suggest avoiding defining brain rhythms solely based on frequency range.	pt_BR
dc.identifier.issn	0270-6474
dc.identifier.uri	https://repositorio.ufrn.br/jspui/handle/123456789/23287
dc.language	eng	pt_BR
dc.rights	Acesso Aberto	pt_BR
dc.subject	High-Frequency Field Oscillations	pt_BR
dc.subject	Spiking Activity	pt_BR
dc.title	On High-Frequency Field Oscillations ( 100 Hz) and the Spectral Leakage of Spiking Activity	pt_BR
dc.type	article	pt_BR