“All disease begins in the gut…Bad digestion is the root of all evil.” Hippocrates (c. 400 BC)
What is neurogastroenterological disease?
Neurogastroenterological disease refers to a range of conditions where the nervous system and gastrointestinal (GI) system intersect, impacting the body’s ability to digest, absorb, and transport food. While we often think of the gut as having a “mind of its own,” it actually relies on an intricate communication system between its own nervous network (the enteric nervous system) and the brain.
Principles of neurogastroenterology
The goal of neurogastroenterological function is to sense the presence of an ingested bolus of food (chewed food mixed with saliva that is ready to be swallowed) or fluid and then to elicit an orderly contractile sequence of activity that transports the bolus distally (toward the end of the digestive tract) so that nutrient absorption may occur at the proper time and place and unabsorbed materials efficiently excreted.
While the neuroanatomical components of the GI tract vary by region, all parts possess a multilayered visceral wall composed of muscle fibers (typically longitudinal and circular), interspersed with networks of myenteric and submucosal nerves, enteric glial cells, interstitial cells of Cajal, and immune cells.
Together, these regulate sensory and motor activity that makes coordinated digestion possible. Under healthy conditions, this occurs with remarkable spatial and temporal precision. In disease states, that control is often lost.
Each Region Of The GI Tract Demonstrates A Signature Form Of Neurogastroenterological Structure & Regulation:
- Oropharynx – Coordinates ingestion, chewing, and safe transfer of food and fluid into the esophagus.
- Esophagus – Uses wave-like muscle contractions to propel contents distally, including regulated opening of the lower esophageal sphincter into the stomach.
- Stomach & Small Intestine – The proximal stomach relaxes to accommodate incoming food, followed by distal contractions that grind and deliver chyme to the small intestine. There, motility integrates with hormonal signals to support absorption and motility.
- Colon & Anorectum – The colon absorbs water and electrolytes and consolidates stool, while the distal colon and pelvic floor work in tandem to regulate defecation.
This anatomical and physiological foundation helps explain why motility dysfunction can take so many forms, and why localized symptoms often reflect a broader system-level disruption.
What are the symptoms of neurogastroenterological disease?
Symptoms vary depending on where in the GI tract the dysfunction occurs, but common complaints include:
- Difficulty swallowing (dysphagia) – Food feels stuck in the throat or chest
- Gastroparesis – Delayed stomach emptying leading to nausea, vomiting, pain, bloating, weight loss
- Reflux & heartburn – Food and acid back up into the esophagus
- Chronic constipation or diarrhea – Unpredictable motility issues affecting the colon
- Severe distension – Indicative of an underlying intestinal motility problem
Clinical areas of neurogastroenterological disease
Clinical focus includes the diagnosis and management of complex gastrointestinal motility disorders, including:
- Difficulty swallowing (oropharyngeal and esophageal dysmotility)
- Esophageal motility disorders (including dysmotility related to gastroesophageal reflux and achalasia)
- Gastroparesis and stomach motility disorders
- Intestinal dysmotility (small bowel and colon function issues)
- Pelvic floor disorders affecting bowel function
While conventional diagnostic tests (imaging, endoscopy) can provide useful information, they often fail to capture the underlying mechanism of the dysfunction, especially when symptoms stem from subtle or poorly understood disruptions in the nervous system’s control over the gut. Such conditions require an approach that combines clinical judgment with advanced concepts and techniques to personalize care based on each patient’s unique pathophysiology.
