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	Provedor de dados 56 (2) Autor Infantosi,A.F.C. (2) Melges,D.B. (2) Miranda de Sá,A.M.F.L. (1) Tierra-Criollo,C.J. (1) Palavra-chave Magnitude-squared coherence (2) Somatosensory response detection (2) Tibial nerve (2) Gamma oscillations (1) Topography (1) Tipo do documento Info:eu-repo/semantics/article (2) Ano 2008 (1) 2006 (1) País Brazil (2) Idioma Inglês (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última Use of magnitude-squared coherence to identify the maximum driving response band of the somatosensory evoked potential 56 Infantosi,A.F.C.; Melges,D.B.; Tierra-Criollo,C.J.. The present study proposes to apply magnitude-squared coherence (MSC) to the somatosensory evoked potential for identifying the maximum driving response band. EEG signals, leads [Fpz'-Cz'] and [C3'-C4'], were collected from two groups of normal volunteers, stimulated at the rate of 4.91 (G1: 26 volunteers) and 5.13 Hz (G2: 18 volunteers). About 1400 stimuli were applied to the right tibial nerve at the motor threshold level. After applying the anti-aliasing filter, the signals were digitized and then further low-pass filtered (200 Hz, 6th order Butterworth and zero-phase). Based on the rejection of the null hypothesis of response absence (MSC(f) > 0.0060 with 500 epochs and the level of significance set at a = 0.05), the beta and gamma bands, 15-66 Hz,... Tipo: Info:eu-repo/semantics/article Palavras-chave: Gamma oscillations; Somatosensory response detection; Tibial nerve; Magnitude-squared coherence. Ano: 2006 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2006001200011 Topographic distribution of the tibial somatosensory evoked potential using coherence 56 Melges,D.B.; Infantosi,A.F.C.; Miranda de Sá,A.M.F.L.. The objective of the present study was to determine the adequate cortical regions based on the signal-to-noise ratio (SNR) for somatosensory evoked potential (SEP) recording. This investigation was carried out using magnitude-squared coherence (MSC), a frequency domain objective response detection technique. Electroencephalographic signals were collected (International 10-20 System) from 38 volunteers, without history of neurological pathology, during somatosensory stimulation. Stimuli were applied to the right posterior tibial nerve at the rate of 5 Hz and intensity slightly above the motor threshold. Response detection was based on rejecting the null hypothesis of response absence (significance level α= 0.05 and M = 500 epochs). The best detection rates... Tipo: Info:eu-repo/semantics/article Palavras-chave: Somatosensory response detection; Magnitude-squared coherence; Tibial nerve; Topography. Ano: 2008 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2008001200004 Registros recuperados: 2 Primeira ... 1 ... Última

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