Autonomic nervous system response to a solid meal and water loading in healthy children: its relation to gastric...

Area of Science:

• Pediatric Gastroenterology
• Autonomic Nervous System Physiology
• Bioelectrical Signal Analysis

Background:

• Gastric myoelectrical activity (EGG) plays a crucial role in digestion.
• Autonomic nervous system (ANS) regulates gastrointestinal functions.
• Understanding the interplay between EGG and ANS in children is vital for pediatric health.

Purpose of the Study:

• To investigate the correlation between gastric myoelectrical activity and autonomic function in healthy children.
• To determine the impact of a solid meal and water loading on EGG and heart rate variability (HRV).

Main Methods:

• Simultaneous recordings of electrogastrography (EGG) and electrocardiogram (ECG) in healthy children.
• Assessment of autonomic activity using spectral analysis of heart rate variability (HRV).
• Measurements taken before and after a solid meal and water loading.

Main Results:

• A solid meal significantly increased EGG dominant frequency, dominant power, and percentage of normal slow waves.
• Water loading led to a significant increase in EGG dominant power only.
• Postprandial heart rate variability showed increased low-frequency (LF) power and decreased high-frequency (HF) power after a meal.
• Postprandial LF was positively correlated with EGG dominant power, while HF was negatively correlated.

Conclusions:

• Gastric myoelectrical activity in children is modulated by both vagal and sympathetic pathways.
• The autonomic nervous system plays a significant role in regulating gastric electrical activity postprandially.
• These findings contribute to understanding pediatric gastrointestinal physiology and autonomic regulation.