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Habitual night waking associates with dynamics of waking cortical theta power in infancy

Louisa K Gossé1, Frank Wiesemann2, Clare E Elwell3

  • 1Centre for Brain and Cognitive Development, Birkbeck, University of London, London, UK.

Developmental Psychobiology
|November 25, 2022
PubMed

Insights

Infant night waking is linked to altered daytime brain activity, specifically higher theta power and reduced theta modulation. This suggests potential impacts on learning and cognitive development in infants with disrupted sleep.

Area of Science:

  • Neuroscience
  • Developmental Psychology
  • Sleep Science

Background:

  • Individual differences in infant sleep are significant but their impact on early brain development is not well understood.
  • Daytime brain activity, measured by electroencephalogram (EEG) theta power and its modulation, is associated with later cognitive development.
  • Understanding the relationship between sleep quality and brain function in infants is crucial for identifying potential developmental risks.

Purpose of the Study:

  • To investigate the association between infant night sleep quality and daytime brain activity, specifically EEG theta power and its dynamic modulation.
  • To explore how habitual sleep patterns, including night waking, relate to neural processing during cognitive tasks in infants.
  • To determine if sleep disruptions in infancy may signal altered learning and memory consolidation processes.

Main Methods:

  • A longitudinal study involving 76 typically developing infants (4-14 months) with multiple lab visits over 6 months.
  • Habitual sleep was assessed using sleep diaries, actigraphy, and the Brief Infant Sleep Questionnaire.
  • Twenty-channel EEG was recorded during video مشاهده (nursery rhymes), analyzing theta power and its modulation during novel stimuli.

Main Results:

  • Both objective and subjective sleep measures indicated that increased night waking correlated with higher overall theta power.
  • Infants with more night waking exhibited reduced dynamic modulation of theta power in response to novel video stimuli.
  • These findings suggest a link between disrupted sleep and altered neural processing during learning-related tasks.

Conclusions:

  • Disrupted infant sleep, characterized by frequent night waking, is associated with measurable differences in daytime brain activity.
  • Altered theta power and modulation may reflect impaired learning and memory consolidation in infants with poor sleep quality.
  • These sleep-related brain activity changes could have long-term implications for infant cognitive development.

Keywords:
EEGactigraphyinfantnight wakingtheta powertheta power change

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