人間の食道運動の数学モデル

Takashi Miura¹, Hiroshi Ishii², Yoshitaka Hata³

¹Department of Anatomy and Cell Biology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Fukuoka Prefecture, Japan.

Royal Society open science

|August 22, 2025

まとめ

この研究は,人間の食道運動の数学モデルを導入し,正常な機能と障害をシミュレートします. このモデルは食道内静止症とその病理的パターンを理解するのに役立ちます.

科学分野:

胃腸内科
コンピュータ生物学
神経科学

背景:

食道内静止症とその疾患には独特の特徴がありますが運動パターンの統一的な枠組みは欠けています
消化管の機能における神経と筋肉の複雑な相互作用を理解することは極めて重要です

研究の目的:

人間の食道運動の単純な数学モデルを提案する.
計算方法を使用して正常および病的な食道運動パターンを分析し,再現する.

主な方法:

中枢神経系信号,腸内神経系ニューロン,食道の滑らかな筋肉を組み込んだ数学的モデルを開発した.
食道体の活性化ダイナミクスを導入し,食道下部スフィンクターの切り替えダイナミクスを導入した.
局所信号伝達と"腸の法則"の原則を組み込んだ.

主要な成果:

消化器の抑制とスフィンクターの機能を含む正常な食道内静脈の生理学的動態を成功裏に再現した.
モデルパラメータを調整することで,シカゴ分類の様々な病理的運動パターンを複製した.
食道運動障害の病原性についての洞察を提供するモデルの能力を実証した.

結論:

提案された数学的モデルは食道運動を理解するための枠組みを提供します.
このモデルは正常な生理機能と様々な病理的なパターンを成功裏にシミュレートします.
この計算的アプローチは食道運動障害の根本的なメカニズムを解明する可能性があります.

キーワード:

高解像度マノメトリー数学的モデリング食道運動性

さらに関連する動画

14:13

Coordinate Mapping of Hyolaryngeal Mechanics in Swallowing

Published on: May 6, 2014

18.3K

12:00

Spatiotemporal Mapping of Motility in Ex Vivo Preparations of the Intestines

Published on: January 27, 2016

10.5K

関連する概念動画

01:16

Gastric Motility

1.2K

Gastric motility is the coordinated contraction and relaxation of stomach muscles that convert ingested food into chyme, a semi-liquid substance ready for further digestion in the intestines. The process begins with the vagus nerve inducing the relaxation of the smooth muscles in the fundus and body of the stomach, allowing these regions to expand and accommodate up to approximately 1.5 liters of food and liquid.
Peristaltic Waves and Chyme Formation
Upon food entry, the stomach initiates...

1.2K

01:30

Typical Model Studies

440

Fluid mechanics model studies often utilize scaled-down systems to predict fluid behavior in full-scale environments, such as river flows, dam spillways, and structures interacting with open surfaces. Maintaining Froude number similarity in river models is crucial, as it replicates surface flow features like wave patterns and velocities.

440

00:57

Physiological Pharmacokinetic Models: Blood Flow-Limited Versus Diffusion-Limited Models

142

Physiological pharmacokinetic models, often called flow-limited or perfusion models, typically assume a swift drug distribution between tissue and venous blood, creating a rapid drug equilibrium. This premise is based on the idea that drug diffusion is extremely fast, and the cell membrane presents no barrier to drug permeation. In this scenario, where no drug binding occurs, the drug concentration in the tissue equals that of the venous blood leaving the tissue. This greatly simplifies the...

142

01:15

Model Approaches for Pharmacokinetic Data: Physiological Models

109

Physiological models in pharmacokinetics are instrumental in understanding the distribution and elimination of drugs within the body. These models describe the drug concentration within target organs, influenced by factors such as drug uptake, tissue volume, and blood flow. Drug uptake is governed by the partition coefficient, which signifies the drug concentration ratio in tissue to that in the blood. The blood flow rate to a specific tissue is expressed as Qt, and the rate of change in tissue...

109

01:20

Gastrointestinal Motility Disorders

594

Gastrointestinal or GI motility disorders are characterized by irregular gastrointestinal tract movements, disrupting food transit from the mouth to the anus. They are caused by damage or dysfunction in gut muscles or nerves. These disorders can cause symptoms such as severe constipation, diarrhea, abdominal pain, and swallowing difficulties. Disorders can affect any segment of the GI tract and range widely in severity, from common conditions like GERD to life-threatening conditions like...

594

01:24

Esophagus

1.3K

The esophagus, a muscular conduit linking the pharynx and stomach, measures roughly 10 inches (25.4 cm) and sits behind the trachea. It remains collapsed when not swallowing. The esophagus follows a predominantly straight path through the thoracic mediastinum and enters the abdominal cavity through a diaphragmatic opening known as the esophageal hiatus.
The movement of edibles from the pharynx into the esophagus is facilitated by the upper esophageal sphincter, which is formed primarily by the...