Evaluation of normal neurological development of human fetuses from 21 to 30 weeks' gestation through fetal auditory evoked response
Autor(a) principal: | |
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Data de Publicação: | 2009 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFRGS |
Texto Completo: | http://hdl.handle.net/10183/149755 |
Resumo: | Objectives: To evaluate the neurological maturation of fetuses between 21 and 30 weeks’ gestation by the auditory evoked response. Methods: The auditory evoked responses of 25 normal singleton fetuses were observed once a week from 21 to 30 weeks’ gestation. The stimulus consisted of five pulses of sinusoidal waves, for 2 s, at 1500 cycles/s, with a sound pressure of 125 dB. Results: Fetal auditory evoked response increased with neurological maturation, presenting two main points of positive discontinuity. The two points in the heart response were detected between the 24th/25th and the 27th/28th week. From the 27th week on, fetal motor response (FMR) was always present. Initial fetal heart response presented a fluctuation pattern between the 21st and the 30th week, with a tendency to increase as gestational age advanced. Fetal heart response also increased with gestational age. Late response (LR) fluctuated until the 29th week, and was always present after that period. Conclusions: The maturation of the fetal nervous system is clearly demonstrated by changes in the auditory evoked responses in different gestational ages, and presents some discontinuity points. |
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Luz, Sérgio HeckerVasconcellos, Fabiano C.Kreling, TatianaPacheco, Fernanda SilvaChaves, Marcia Lorena Fagundes2016-11-19T02:16:54Z20091619-3997http://hdl.handle.net/10183/149755001005434Objectives: To evaluate the neurological maturation of fetuses between 21 and 30 weeks’ gestation by the auditory evoked response. Methods: The auditory evoked responses of 25 normal singleton fetuses were observed once a week from 21 to 30 weeks’ gestation. The stimulus consisted of five pulses of sinusoidal waves, for 2 s, at 1500 cycles/s, with a sound pressure of 125 dB. Results: Fetal auditory evoked response increased with neurological maturation, presenting two main points of positive discontinuity. The two points in the heart response were detected between the 24th/25th and the 27th/28th week. From the 27th week on, fetal motor response (FMR) was always present. Initial fetal heart response presented a fluctuation pattern between the 21st and the 30th week, with a tendency to increase as gestational age advanced. Fetal heart response also increased with gestational age. Late response (LR) fluctuated until the 29th week, and was always present after that period. Conclusions: The maturation of the fetal nervous system is clearly demonstrated by changes in the auditory evoked responses in different gestational ages, and presents some discontinuity points.application/pdfengJournal of perinatal medicine. Berlin. Vol. 37, n. 3 (May 2009), p. 270–275Desenvolvimento fetalGravidezPotenciais evocadosEstudos prospectivosCardiotocographyCentral nervous systemCohort studiesEvoked potentialsAuditoryFetal developmentFetal monitoringFetal movementFetus/physiologyNeurological examinationPregnancy trimester secondProspective studiesEvaluation of normal neurological development of human fetuses from 21 to 30 weeks' gestation through fetal auditory evoked responseEstrangeiroinfo: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:UFRGSORIGINAL001005434.pdf001005434.pdfTexto completo (inglês)application/pdf78618http://www.lume.ufrgs.br/bitstream/10183/149755/1/001005434.pdf669613f2eca72555938e8afbf74fec1bMD51TEXT001005434.pdf.txt001005434.pdf.txtExtracted Texttext/plain27684http://www.lume.ufrgs.br/bitstream/10183/149755/2/001005434.pdf.txtd88661f957aa252b137e7f14ac54a95bMD52THUMBNAIL001005434.pdf.jpg001005434.pdf.jpgGenerated Thumbnailimage/jpeg2155http://www.lume.ufrgs.br/bitstream/10183/149755/3/001005434.pdf.jpg11fd6ddbd1d4ad268742f9bd93e79a1dMD5310183/1497552018-10-29 09:22:58.781oai:www.lume.ufrgs.br:10183/149755Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2018-10-29T12:22:58Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false |
dc.title.pt_BR.fl_str_mv |
Evaluation of normal neurological development of human fetuses from 21 to 30 weeks' gestation through fetal auditory evoked response |
title |
Evaluation of normal neurological development of human fetuses from 21 to 30 weeks' gestation through fetal auditory evoked response |
spellingShingle |
Evaluation of normal neurological development of human fetuses from 21 to 30 weeks' gestation through fetal auditory evoked response Luz, Sérgio Hecker Desenvolvimento fetal Gravidez Potenciais evocados Estudos prospectivos Cardiotocography Central nervous system Cohort studies Evoked potentials Auditory Fetal development Fetal monitoring Fetal movement Fetus/physiology Neurological examination Pregnancy trimester second Prospective studies |
title_short |
Evaluation of normal neurological development of human fetuses from 21 to 30 weeks' gestation through fetal auditory evoked response |
title_full |
Evaluation of normal neurological development of human fetuses from 21 to 30 weeks' gestation through fetal auditory evoked response |
title_fullStr |
Evaluation of normal neurological development of human fetuses from 21 to 30 weeks' gestation through fetal auditory evoked response |
title_full_unstemmed |
Evaluation of normal neurological development of human fetuses from 21 to 30 weeks' gestation through fetal auditory evoked response |
title_sort |
Evaluation of normal neurological development of human fetuses from 21 to 30 weeks' gestation through fetal auditory evoked response |
author |
Luz, Sérgio Hecker |
author_facet |
Luz, Sérgio Hecker Vasconcellos, Fabiano C. Kreling, Tatiana Pacheco, Fernanda Silva Chaves, Marcia Lorena Fagundes |
author_role |
author |
author2 |
Vasconcellos, Fabiano C. Kreling, Tatiana Pacheco, Fernanda Silva Chaves, Marcia Lorena Fagundes |
author2_role |
author author author author |
dc.contributor.author.fl_str_mv |
Luz, Sérgio Hecker Vasconcellos, Fabiano C. Kreling, Tatiana Pacheco, Fernanda Silva Chaves, Marcia Lorena Fagundes |
dc.subject.por.fl_str_mv |
Desenvolvimento fetal Gravidez Potenciais evocados Estudos prospectivos |
topic |
Desenvolvimento fetal Gravidez Potenciais evocados Estudos prospectivos Cardiotocography Central nervous system Cohort studies Evoked potentials Auditory Fetal development Fetal monitoring Fetal movement Fetus/physiology Neurological examination Pregnancy trimester second Prospective studies |
dc.subject.eng.fl_str_mv |
Cardiotocography Central nervous system Cohort studies Evoked potentials Auditory Fetal development Fetal monitoring Fetal movement Fetus/physiology Neurological examination Pregnancy trimester second Prospective studies |
description |
Objectives: To evaluate the neurological maturation of fetuses between 21 and 30 weeks’ gestation by the auditory evoked response. Methods: The auditory evoked responses of 25 normal singleton fetuses were observed once a week from 21 to 30 weeks’ gestation. The stimulus consisted of five pulses of sinusoidal waves, for 2 s, at 1500 cycles/s, with a sound pressure of 125 dB. Results: Fetal auditory evoked response increased with neurological maturation, presenting two main points of positive discontinuity. The two points in the heart response were detected between the 24th/25th and the 27th/28th week. From the 27th week on, fetal motor response (FMR) was always present. Initial fetal heart response presented a fluctuation pattern between the 21st and the 30th week, with a tendency to increase as gestational age advanced. Fetal heart response also increased with gestational age. Late response (LR) fluctuated until the 29th week, and was always present after that period. Conclusions: The maturation of the fetal nervous system is clearly demonstrated by changes in the auditory evoked responses in different gestational ages, and presents some discontinuity points. |
publishDate |
2009 |
dc.date.issued.fl_str_mv |
2009 |
dc.date.accessioned.fl_str_mv |
2016-11-19T02:16:54Z |
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Estrangeiro info:eu-repo/semantics/article |
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http://hdl.handle.net/10183/149755 |
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1619-3997 |
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001005434 |
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http://hdl.handle.net/10183/149755 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.ispartof.pt_BR.fl_str_mv |
Journal of perinatal medicine. Berlin. Vol. 37, n. 3 (May 2009), p. 270–275 |
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info:eu-repo/semantics/openAccess |
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openAccess |
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