Delta brushes are not just a hallmark of EEG in human preterm infants

Kidokoro, Hiroyuki

doi:10.1111/ped.14420

Cited by 13 publications

(6 citation statements)

References 46 publications

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“…After the second presensory stage, there is a transition period (between 34 and 40 GW) to a sensory processing stage, marked by continuous EEG pattern and disappearance of the tracé alternant pattern. The progression that is well characterized in rodents appears to align with clinical observations on the developmental course in humans, in which delta brushes peak around 35-36 GW and disappear at term (Kidokoro, 2021).…”

Section: Transition To Early Experience-dependent Control Of Neural A...supporting

confidence: 72%

“…During this second presensory stage, sensory input (in the visual domain) comes to elicit a neurophysiological response (∼100 ms poststimulus) that precedes the delta brush. According to Colonnese and Phillips (2018), the presensory period in humans is between 25 and 28 GW, but the first presensory stage is likely earlier than 25 GW, because delta brushes can be observed around 22 GW (Kidokoro, 2021). After the second presensory stage, there is a transition period (between 34 and 40 GW) to a sensory processing stage , marked by continuous EEG pattern and disappearance of the tracé alternant pattern.…”

Section: Part 2: the Fetal Mechanisms Of Neural Arousal Prepare The N...mentioning

confidence: 99%

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Continuity and change in neural plasticity through embryonic morphogenesis, fetal activity‐dependent synaptogenesis, and infant memory consolidation

Luu,

Tucker

2023

Developmental Psychobiology

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There is an apparent continuity in human neural development that can be traced to venerable themes of vertebrate morphogenesis that have shaped the evolution of the reptilian telencephalon (including both primitive three‐layered cortex and basal ganglia) and then the subsequent evolution of the mammalian six‐layered neocortex. In this theoretical analysis, we propose that an evolutionary–developmental analysis of these general morphogenetic themes can help to explain the embryonic development of the dual divisions of the limbic system that control the dorsal and ventral networks of the human neocortex. These include the archicortical (dorsal limbic) Papez circuits regulated by the hippocampus that organize spatial, contextual memory, as well as the paleocortical (ventral limbic) circuits that organize object memory. We review evidence that these dorsal and ventral limbic divisions are controlled by the differential actions of brainstem lemnothalamic and midbrain collothalamic arousal control systems, respectively, thereby traversing the vertebrate subcortical neuraxis. These dual control systems are first seen shaping the phyletic morphogenesis of the archicortical and paleocortical foundations of the forebrain in embryogenesis. They then provide dual modes of activity‐dependent synaptic organization in the active (lemnothalamic) and quiet (collothalamic) stages of fetal sleep. Finally, these regulatory systems mature to form the major systems of memory consolidation of postnatal development, including the rapid eye movement (lemnothalamic) consolidation of implicit memory and social attachment in the first year, and then—in a subsequent stage—the non‐REM (collothalamic) consolidation of explicit memory that is integral to the autonomy and individuation of the second year of life.

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Section: Transition To Early Experience-dependent Control Of Neural A...supporting

confidence: 72%

Section: Part 2: the Fetal Mechanisms Of Neural Arousal Prepare The N...mentioning

confidence: 99%

Continuity and change in neural plasticity through embryonic morphogenesis, fetal activity‐dependent synaptogenesis, and infant memory consolidation

Luu,

Tucker

2023

Developmental Psychobiology

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“…In particular, this pattern disappears around the end of the first postnatal week. Spontaneous and evoked delta-brushes can be observed in the somatosensory cortex of premature human neonates of 28-32 weeks of postconceptional age (Milh et al, 2007;Luhmann et al, 2014Luhmann et al, , 2018Luhmann et al, , 2022Molnár et al, 2020;Shibata and Otsubo, 2020;Kidokoro, 2021). Delta brushes in preterm human infants correlate with the so-called spindle bursts, recorded in rodents during the early postnatal period Colonnese and Khazipov, 2012;Yang et al, 2016).…”

Section: The Newborn's Likelihood To Survive and The Activation Of Sp...mentioning

confidence: 95%

The Newborn's Reaction to Light as the Determinant of the Brain's Activation at Human Birth

Polese

Riccio

Fagioli

et al. 2022

Front. Integr. Neurosci.

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Developmental neuroscience research has not yet fully unveiled the dynamics involved in human birth. The trigger of the first breath, often assumed to be the marker of human life, has not been characterized nor has the process entailing brain modification and activation at birth been clarified yet. To date, few researchers only have investigated the impact of the extrauterine environment, with its strong stimuli, on birth. This ‘hypothesis and theory' article assumes the role of a specific stimulus activating the central nervous system (CNS) at human birth. This stimulus must have specific features though, such as novelty, efficacy, ubiquity, and immediacy. We propose light as a robust candidate for the CNS activation via the retina. Available data on fetal and neonatal neurodevelopment, in particular with reference to retinal light-responsive pathways, will be examined together with the GABA functional switch, and the subplate disappearance, which, at an experimental level, differentiate the neonatal brain from the fetal brain. In this study, we assume how a very rapid activation of retinal photoreceptors at birth initiates a sudden brain shift from the prenatal pattern of functions to the neonatal setup. Our assumption implies the presence of a photoreceptor capable of capturing and transducing light/photon stimulus, transforming it into an effective signal for the activation of new brain functions at birth. Opsin photoreception or, more specifically, melanopsin-dependent photoreception, which is provided by intrinsically photosensitive retinal ganglion cells (ipRGCs), is considered as a valid candidate. Although what is assumed herein cannot be verified in humans based on knowledge available so far, proposing an important and novel function can trigger a broad range of diversified research in different domains, from neurophysiology to neurology and psychiatry.

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“…Delta-band activity emerges from around 24 weeks gestational age as discontinuous activity at a frequency of approximately 0.5 Hz (Vecchierini et al, 2007). The delta activity arises from the early maturation of thalamocortical connections (Arichi et al, 2017; Kidokoro, 2021). From around 31 weeks gestational age, delta activity can be exogenously evoked by sound (Chipaux et al, 2013).…”

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confidence: 99%

Does Electrophysiological Maturation Shape Language Acquisition?

Menn

Männel

Meyer

2023

Perspect Psychol Sci

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Infants master temporal patterns of their native language at a developmental trajectory from slow to fast: Shortly after birth, they recognize the slow acoustic modulations specific to their native language before tuning into faster language-specific patterns between 6 and 12 months of age. We propose here that this trajectory is constrained by neuronal maturation—in particular, the gradual emergence of high-frequency neural oscillations in the infant electroencephalogram. Infants’ initial focus on slow prosodic modulations is consistent with the prenatal availability of slow electrophysiological activity (i.e., theta- and delta-band oscillations). Our proposal is consistent with the temporal patterns of infant-directed speech, which initially amplifies slow modulations, approaching the faster modulation range of adult-directed speech only as infants’ language has advanced sufficiently. Moreover, our proposal agrees with evidence from premature infants showing maturational age is a stronger predictor of language development than ex utero exposure to speech, indicating that premature infants cannot exploit their earlier availability of speech because of electrophysiological constraints. In sum, we provide a new perspective on language acquisition emphasizing neuronal development as a critical driving force of infants’ language development.

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Delta brushes are not just a hallmark of EEG in human preterm infants

Cited by 13 publications

References 46 publications

Continuity and change in neural plasticity through embryonic morphogenesis, fetal activity‐dependent synaptogenesis, and infant memory consolidation

Continuity and change in neural plasticity through embryonic morphogenesis, fetal activity‐dependent synaptogenesis, and infant memory consolidation

The Newborn's Reaction to Light as the Determinant of the Brain's Activation at Human Birth

Does Electrophysiological Maturation Shape Language Acquisition?

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