Électroencéphalographie du nouveau-né prématuré et à terme. Aspects maturatifs et glossaire

Lamblin, Marie‐Dominique; André, M; Challamel, Marie‐Josèphe; Curzi‐Dascalova, Lilia; Am, D'Allest; Giovanni, E. De; Moussalli-Salefranque, F.; Navelet, Y; Plouin, Perrine; Radvanyi-Bouvet, Marie-France; Samson-Dollfus, D; Vecchierini-Blineau, M.F.

doi:10.1016/s0987-7053(99)80051-3

Cited by 171 publications

(58 citation statements)

References 34 publications

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“…The salient slow component is practically lost after filtering with the typical aEEG/CFM bandwidth (around 2-15 Hz). The response can be still fairly well identified from traces where the high-pass filter has been set to conventional EEG settings at 0.3-1.0 Hz (17). Hence, although visual identification of the SERs from a raw EEG is easy even without knowing the exact timing of stimulation, the stimulation time marks (triggers) must be precise to be able to analyze SERs from a trace that has been distorted by filters.…”

Section: Resultsmentioning

confidence: 99%

An Easy and Practical Method for Routine, Bedside Testing of Somatosensory Systems in Extremely Low Birth Weight Infants

Vanhatalo

Jousmäki²,

Andersson

et al. 2009

Pediatr Res

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This study was set out to develop and describe a novel, simple, and safe method for routine bedside testing of somatosensory system in very early preterm infants. We recorded electroencephalogram (EEG) activity after tactile stimulation of hand (palm) and foot (sole) by a soft hairbrush stimulator in extremely low birth weight infants (n ϭ 10; GA, 24 -28, recording at conceptional age 30 -32 wk) and compared with the raw EEG responses to those seen by one-or two-channel brain monitors. In every subject, single tactile stimuli produced prominent (100 -350 V) somatosensory evoked responses (SERs) that were readily identified in the ongoing EEG signal. The maximal SER was in the contralateral hemisphere at around the corresponding somatosensory representation areas. Conventional EEG filtering did significantly reduce the SERs, but they could still be identified in the routine brain monitor setting widely available in NICUs. The method described here is directly applicable to assessment of integrity of somatosensory system in the early preterm period. It needs minimal training and requires an EEG system or a brain monitor device that is available in most units. Thus, the technique is likely to open a novel window to neurologic assessment of these babies. (Pediatr Res 66: 710-713, 2009)

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Section: Resultsmentioning

confidence: 99%

An Easy and Practical Method for Routine, Bedside Testing of Somatosensory Systems in Extremely Low Birth Weight Infants

Vanhatalo

Jousmäki²,

Andersson

et al. 2009

Pediatr Res

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“…20 EEG background was classified into 5 patterns as previously described 21,22 : 1) normal pattern for gestational age, including recordings with transient periods of discontinuous activity occupying less than 50% of the recording, with presence of distinct state changes; 2) excessively discontinuous, with persistence of discontinuous activity occupying more than 50% of the recording and consisting of bursts of normal activity separated by abnormally long, interburst intervals of more than 6 seconds duration, and amplitude Ͻ25 and Ͼ5 V, with poor state changes; 3) depressed and undifferentiated, with persistently low-voltage background activity with amplitude between 5 and 15 V and without normal features; 4) burst suppression (BS), invariant and unreactive pattern of bursts of paroxysmal activity with mixed features but no age-appropriate activity lasting less than 10 seconds alternating with periods of marked voltage attenuation with amplitude Յ5 V; 5) extremely low voltage, invariant and unreactive pattern, with amplitude Ͻ5 V or with no discernible cerebral activity.…”

Section: Methods Consecutive Newborns With Hie Who Underwentmentioning

confidence: 99%

Video-EEG monitoring in newborns with hypoxic-ischemic encephalopathy treated with hypothermia

Nash¹,

Bonifacio²,

Glass³

et al. 2011

Neurology

169

128

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“…TST have been studied by many authors either in normal or high risk newborns 6,9,14-17 .There is a consensus that these transients are normal features of neonatal EEG and are related to preterm newborns, although some authors have described their appearance in term or near term newborns with different morphologies 7,8 .…”

Section: Discussionmentioning

confidence: 99%

“…It has been reported that the number and duration of TST increases until 31 weeks of CA and they tend to disappear until 34 weeks. They usually are recorded bilaterally, but asynchronously, and are more evident during REM sleep 7 .…”

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confidence: 99%

Developmental characteristics of temporal sharp transients in the EEG of normal preterm and term newborns

Nunes

Gameleira²,

Oliveira³

et al. 2003

Arq. Neuro-Psiquiatr.

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-Objective: To describe developmental characteristics, morphological aspects and incidence of temporal sharp transients (TST) in normal preterm and term newborns at matched conceptional ages (CA). Method: Neonatal EEGs from two groups of normal newborns were evaluated in order to identify and characterize TST. Group I (n=40) consisted of newborns from 34 to 40 weeks of gestational age (GA) that were submitted to a single EEG between 24 and 48 hours of life. Group II consisted of 10 preterm newborns with GA between 30-32 weeks, followed with a weekly EEG until they reached term. Morphology of TST was divided in 3 groups (temporal sawtooth, isolated transients or repetitive transients). TST index, density and total number were calculated in each polysomnography and related to sleep stages and CA. Laterality (right/ left) was also evaluated. The groups were compared at 34, 36, 38 and 40 weeks of CA. Results: TST index and density decreased with the increase of CA in both groups (p<0.0001). The temporal sawtooth feature was registered in both groups only at 34 weeks. Although rare, repetitive and isolated TST were the most prevalent morphology between 36 -40 weeks CA. Significant intragroup difference was observed in the comparison of TST density in REM and transitional sleep in GI. Moreover, isolated TST morphology was significant higher in GI at 34 weeks when compared to the others CA. No intragroup differences were observed on GII. No significant differences between the groups were observed considering TST number, index, density, morphology or laterality, at the matched CA. Conclusion: TST are normal features of neonatal EEG, as they are registered in normal newborns. Its incidence varies accordingly to morphology and they tend to disappear following the increase of CA. Temporal sawtooth appears more often in preterm newborns. Our results suggest that TST index, density and morphology variability may be a function of CA.KEY WORDS: neonatal EEG, temporal sharp waves, preterm newborn, sleep ontogenesis. Características das ondas agudas temporais no EEG de recém-nascidos normais pré-termo e a termoRESUMO -Objetivo: Descrever as características, aspectos morfológicos e incidência das ondas agudas temporais (OAT) em recém -nascido pré-termo e a termo pareados por idade concepcional (IC). Método: OAT foram identificadas e analisadas nos EEGs de dois grupos de recém -nascidos normais. O GI (n=40) foi constituído de recém -nascidos com idade gestacional (IG) de 34 a 40 semanas, submetidos a EEG com 24-48 horas de vida. O GII consistia de 10 recém -nascidos pré -termo com IG entre 30 -32 semanas, seguidos com EEG semanal até atingirem IC de 42 semanas. As OAT foram divididas de acordo com sua morfologia em serrilhada, isolada e repetitivas. O número total, índice e densidade de OAT foram calculados em cada EEG neonatal e relacionados ao estágio do sono e IC. A lateralidade (esquerda/direita) também foi analisada. Os grupos foram comparados nas seguintes semanas de IC: 34, 36,38 e 40 semanas. Resultados: O índice ...

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Électroencéphalographie du nouveau-né prématuré et à terme. Aspects maturatifs et glossaire

Cited by 171 publications

References 34 publications

An Easy and Practical Method for Routine, Bedside Testing of Somatosensory Systems in Extremely Low Birth Weight Infants

An Easy and Practical Method for Routine, Bedside Testing of Somatosensory Systems in Extremely Low Birth Weight Infants

Video-EEG monitoring in newborns with hypoxic-ischemic encephalopathy treated with hypothermia

Developmental characteristics of temporal sharp transients in the EEG of normal preterm and term newborns

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