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Preterm EEG: A Multimodal Neurophysiological Protocol
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The frontal sharp transient in newborns: An endogenous neurobiomarker concomitant to the physiological and critical

Laura Routier1,2, Mahdi Mahmoudzadeh1, Marine Panzani1

  • 1GRAMFC, INSERM UMR-S 1105, CURS, University of Picardie Jules Verne, rue René Laennec, 80054 Amiens, Cedex 1, France.

Cerebral Cortex (New York, N.Y. : 1991)
|September 6, 2022
PubMed

The frontal sharp transient (FST) consists of transient electrical activity recorded around the transitional period from the in to ex utero environment. Although its positive predictive value is assumed, nothing is known about its functionality or origin. The objectives were (i) to define its characteristics and (ii) to develop functional hypothesis. The 128-channels high-resolution electroencephalograms of 20 healthy newborns (37.1-41.6 weeks) were studied. The morphological and time-frequency characteristics of 418 FSTs were analyzed. The source localization of the FSTs was obtained using a finite element head model (5 layers and fontanels) and various source localization methods (distributed and dipolar). The characteristics (duration, slopes, and amplitude) and the localization of FSTs were not modulated by the huge developmental neuronal processes that occur during the very last period of gestation. The sources were located beneath the ventral median part of the frontal lobe around the interhemispheric fissure, suggesting that the olfactory bulbs and orbitofrontal cortex, essential in olfaction and the mother-infant attachment relationship, are likely candidates for the generation of FSTs. FSTs may contribute to the implementation of the functionalities of brain structures involved in the higher-order processing necessary for survival ahead of delivery, with a genetic fingerprint.

Keywords:
attachmenthigh-resolution EEGneurodevelopmentsource localizationtransient frontal sharp waves

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