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Oesophageal motor activity and sleep state in the newborn human infant
D J Manning1, P J Bowden, M K Hathorn
1Dept. of Physiology, London Hospital Medical College, Whitechapel, U.K.
Insights
Healthy neonates exhibit more esophageal contractions during active sleep than quiet sleep. These contractions, including those linked to breathing and swallowing, decrease as active sleep transitions to quiet sleep.
Area of Science:
- Neonatal physiology
- Sleep studies
- Respiratory control
Background:
- Understanding neonatal sleep patterns is crucial for identifying potential health issues.
- Esophageal pressure monitoring provides insights into respiratory and swallowing mechanisms in infants.
- Differentiating between active and quiet sleep states is essential for interpreting physiological data.
Purpose of the Study:
- To investigate the occurrence and characteristics of esophageal contractions during different sleep states in healthy neonates.
- To determine if sleep state influences esophageal motility and its relation to breathing and swallowing events.
- To compare findings in neonates with and without periodic breathing.
Main Methods:
- Oesophageal pressure and ventilation were recorded in healthy full-term neonates during sleep.
- Sleep state was defined using combined behavioral and electroencephalographic criteria or behavioral criteria alone.
- Esophageal contractions were analyzed in relation to sleep state, sighs, breathing interruptions, and swallowing events.
Main Results:
- Spontaneous esophageal contractions were frequent during active sleep and rare during quiet sleep in all infants.
- The transition from active to quiet sleep showed a gradual decrease in esophageal contraction frequency.
- Esophageal contractions associated with sighs and potential swallowing were significantly more common in active sleep.
- Similar sleep-state differences in esophageal contractions were observed in infants with periodic breathing.
Conclusions:
- Neonatal esophageal motility is significantly influenced by sleep state, with higher activity during active sleep.
- Sleep state plays a role in coordinating esophageal contractions with respiratory and swallowing reflexes.
- The observed patterns suggest distinct physiological mechanisms underlying esophageal function in active versus quiet sleep in neonates.
Abstract:
Oesophageal pressure and ventilation were recorded during sleep in healthy full-term neonates with sleep state defined by one of two methods; in 35 infants by combined behavioural and electroencephalographic criteria, and in a further 13 infants by behavioural criteria alone. Spontaneous oesophageal contractions occurred in all infants during active sleep but rarely during quiet sleep. The transition from active to quiet sleep was accompanied by a gradual reduction in the frequency of these contractions. Oesophageal contractions associated with sighs and contractions shortly following interruption of breathing suggestive of swallowing were also significantly more common in active sleep. In 13 infants who showed periodic breathing the same differences in prevalence of spontaneous oesophageal contractions in each sleep state were observed.