Synchronization and propagation of global sleep spindles
Autor(a) principal: | |
---|---|
Data de Publicação: | 2016 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFRGS |
Texto Completo: | http://hdl.handle.net/10183/165352 |
Resumo: | Sleep spindles occur thousands of times during normal sleep and can be easily detected by visual inspection of EEG signals. These characteristics make spindles one of the most studied EEG structures in mammalian sleep. In this work we considered global spindles, which are spindles that are observed simultaneously in all EEG channels.We propose a methodology that investigates both the signal envelope and phase/frequency of each global spindle. By analysing the global spindle phase we showed that 90% of spindles synchronize with an average latency time of 0.1 s. We also measured the frequency modulation (chirp) of global spindles and found that global spindle chirp and synchronization are not correlated. By investigating the signal envelopes and implementing a homogeneous and isotropic propagation model, we could estimate both the signal origin and velocity in global spindles. Our results indicate that this simple and non-invasive approach could determine with reasonable precision the spindle origin, and allowed us to estimate a signal speed of 0.12 m/s. Finally, we consider whether synchronization might be useful as a non-invasive diagnostic tool. |
id |
UFRGS-2_b37e674c173cdf8228bef7c0e5c3bad0 |
---|---|
oai_identifier_str |
oai:www.lume.ufrgs.br:10183/165352 |
network_acronym_str |
UFRGS-2 |
network_name_str |
Repositório Institucional da UFRGS |
repository_id_str |
|
spelling |
Souza, Rafael Toledo Fernandes deGerhardt, Gunther Johannes LewczukSchonwald, Suzana VeigaRybarczyk Filho, José LuizLemke, Ney2017-08-16T02:35:56Z20161932-6203http://hdl.handle.net/10183/165352001044504Sleep spindles occur thousands of times during normal sleep and can be easily detected by visual inspection of EEG signals. These characteristics make spindles one of the most studied EEG structures in mammalian sleep. In this work we considered global spindles, which are spindles that are observed simultaneously in all EEG channels.We propose a methodology that investigates both the signal envelope and phase/frequency of each global spindle. By analysing the global spindle phase we showed that 90% of spindles synchronize with an average latency time of 0.1 s. We also measured the frequency modulation (chirp) of global spindles and found that global spindle chirp and synchronization are not correlated. By investigating the signal envelopes and implementing a homogeneous and isotropic propagation model, we could estimate both the signal origin and velocity in global spindles. Our results indicate that this simple and non-invasive approach could determine with reasonable precision the spindle origin, and allowed us to estimate a signal speed of 0.12 m/s. Finally, we consider whether synchronization might be useful as a non-invasive diagnostic tool.application/pdfengPLoS ONE. San Francisco. Vol. 11, no. 3 (Mar. 2016), e0151369, 18 p.EletroencefalografiaSonoSynchronization and propagation of global sleep spindlesEstrangeiroinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFRGSinstname:Universidade Federal do Rio Grande do Sul (UFRGS)instacron:UFRGSORIGINAL001044504.pdf001044504.pdfTexto completo (inglês)application/pdf6368011http://www.lume.ufrgs.br/bitstream/10183/165352/1/001044504.pdfe63458b57cda770500553fc03628166bMD51TEXT001044504.pdf.txt001044504.pdf.txtExtracted Texttext/plain50631http://www.lume.ufrgs.br/bitstream/10183/165352/2/001044504.pdf.txt4590825ef8a8be6ad509b5dc2a7167fdMD52THUMBNAIL001044504.pdf.jpg001044504.pdf.jpgGenerated Thumbnailimage/jpeg1992http://www.lume.ufrgs.br/bitstream/10183/165352/3/001044504.pdf.jpgbcfac9956cc86c721b54654e261aec9cMD5310183/1653522023-05-17 03:27:47.698645oai:www.lume.ufrgs.br:10183/165352Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2023-05-17T06:27:47Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false |
dc.title.pt_BR.fl_str_mv |
Synchronization and propagation of global sleep spindles |
title |
Synchronization and propagation of global sleep spindles |
spellingShingle |
Synchronization and propagation of global sleep spindles Souza, Rafael Toledo Fernandes de Eletroencefalografia Sono |
title_short |
Synchronization and propagation of global sleep spindles |
title_full |
Synchronization and propagation of global sleep spindles |
title_fullStr |
Synchronization and propagation of global sleep spindles |
title_full_unstemmed |
Synchronization and propagation of global sleep spindles |
title_sort |
Synchronization and propagation of global sleep spindles |
author |
Souza, Rafael Toledo Fernandes de |
author_facet |
Souza, Rafael Toledo Fernandes de Gerhardt, Gunther Johannes Lewczuk Schonwald, Suzana Veiga Rybarczyk Filho, José Luiz Lemke, Ney |
author_role |
author |
author2 |
Gerhardt, Gunther Johannes Lewczuk Schonwald, Suzana Veiga Rybarczyk Filho, José Luiz Lemke, Ney |
author2_role |
author author author author |
dc.contributor.author.fl_str_mv |
Souza, Rafael Toledo Fernandes de Gerhardt, Gunther Johannes Lewczuk Schonwald, Suzana Veiga Rybarczyk Filho, José Luiz Lemke, Ney |
dc.subject.por.fl_str_mv |
Eletroencefalografia Sono |
topic |
Eletroencefalografia Sono |
description |
Sleep spindles occur thousands of times during normal sleep and can be easily detected by visual inspection of EEG signals. These characteristics make spindles one of the most studied EEG structures in mammalian sleep. In this work we considered global spindles, which are spindles that are observed simultaneously in all EEG channels.We propose a methodology that investigates both the signal envelope and phase/frequency of each global spindle. By analysing the global spindle phase we showed that 90% of spindles synchronize with an average latency time of 0.1 s. We also measured the frequency modulation (chirp) of global spindles and found that global spindle chirp and synchronization are not correlated. By investigating the signal envelopes and implementing a homogeneous and isotropic propagation model, we could estimate both the signal origin and velocity in global spindles. Our results indicate that this simple and non-invasive approach could determine with reasonable precision the spindle origin, and allowed us to estimate a signal speed of 0.12 m/s. Finally, we consider whether synchronization might be useful as a non-invasive diagnostic tool. |
publishDate |
2016 |
dc.date.issued.fl_str_mv |
2016 |
dc.date.accessioned.fl_str_mv |
2017-08-16T02:35:56Z |
dc.type.driver.fl_str_mv |
Estrangeiro info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10183/165352 |
dc.identifier.issn.pt_BR.fl_str_mv |
1932-6203 |
dc.identifier.nrb.pt_BR.fl_str_mv |
001044504 |
identifier_str_mv |
1932-6203 001044504 |
url |
http://hdl.handle.net/10183/165352 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.ispartof.pt_BR.fl_str_mv |
PLoS ONE. San Francisco. Vol. 11, no. 3 (Mar. 2016), e0151369, 18 p. |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.source.none.fl_str_mv |
reponame:Repositório Institucional da UFRGS instname:Universidade Federal do Rio Grande do Sul (UFRGS) instacron:UFRGS |
instname_str |
Universidade Federal do Rio Grande do Sul (UFRGS) |
instacron_str |
UFRGS |
institution |
UFRGS |
reponame_str |
Repositório Institucional da UFRGS |
collection |
Repositório Institucional da UFRGS |
bitstream.url.fl_str_mv |
http://www.lume.ufrgs.br/bitstream/10183/165352/1/001044504.pdf http://www.lume.ufrgs.br/bitstream/10183/165352/2/001044504.pdf.txt http://www.lume.ufrgs.br/bitstream/10183/165352/3/001044504.pdf.jpg |
bitstream.checksum.fl_str_mv |
e63458b57cda770500553fc03628166b 4590825ef8a8be6ad509b5dc2a7167fd bcfac9956cc86c721b54654e261aec9c |
bitstream.checksumAlgorithm.fl_str_mv |
MD5 MD5 MD5 |
repository.name.fl_str_mv |
Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS) |
repository.mail.fl_str_mv |
|
_version_ |
1801224926422630400 |