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Updated: May 9, 2026
Application of an Amplitude-integrated EEG Monitor (Cerebral Function Monitor) to Neonates
Published on: September 6, 2017
In and ex utero maturation of premature infants electroencephalographic indices
Eilon Shany1, Irina Meledin1, Shlomo Gilat2
1Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer Sheva, Israel; Neonatal Department, Soroka Medical Center, Beer Sheva, Israel.
Insights
Extra-uterine life does not significantly alter cerebral activity maturation in stable premature infants. Neonatal EEG indices show similar in-utero and ex-utero brain development patterns.
Area of Science:
- Neonatal Neurology
- Developmental Neuroscience
- Electroencephalography (EEG)
Background:
- Premature infants experience significant neurological development post-birth.
- Assessing brain activity maturation ex-utero is crucial for understanding developmental trajectories.
Purpose of the Study:
- To evaluate how extra-uterine life impacts the continuity and amplitude of cerebral activity in premature infants.
- To compare brain activity maturation in premature infants after birth versus soon after delivery.
Main Methods:
- Prospective recruitment of stable infants (<34 weeks gestation).
- Bi-weekly electroencephalogram (EEG) recordings analyzed for interburst intervals and wavelength amplitudes.
- Linear regression used to assess conceptional age prediction, compared to a newborn group.
Main Results:
- Conceptional age significantly predicted interburst intervals only in the newborn group.
- Delta and theta amplitudes were predicted by conceptional age in newborns and other groups.
- No significant differences in maturation were detected between groups.
Conclusions:
- Neonatal EEG indices do not readily reveal the effects of ex-utero maturation on stable premature infants' brains.
- Findings support the concept of similar in-utero and ex-utero maturation of cerebral activity in this population.
Objectives:
To assess the effect of extra uterine life on continuity and amplitude of premature infants' cerebral activity at different gestational age as compared to soon after birth.
Methods:
Stable infants less than 34weeks gestation were prospectively recruited and EEG was recorded bi-weekly. Interburst interval and different wavelength amplitudes were digitally measured during the most discontinuous and most continuous (periods with longest and shortest interburst intervals, respectively) parts of the tracings. Linear regression was used to assess conceptional age prediction of interburst interval and wavelength amplitudes. Significant regression results were compared to the group of babies recorded close to delivery (newborn group).
Results:
144 EEG tracings from 59 infants were analyzed. Interburst intervals were significantly predicted by conceptional age in the newborn group only (p⩽0.002). Delta and theta amplitudes were significantly predicted by conceptional age in the newborn group and most of the other conceptional age groups (p<0.004). No significant differences were detected between the different groups.
Conclusions:
Our data reiterates the normal maturation of cerebral activity in the premature infant and support the concept of similar in and ex-utero maturation of cerebral activity in stable premature infants.
Significance:
The effect of ex-utero maturation on the brain of stable premature infant is not readily discernible when using specific neonatal EEG indices.
