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The esophageal hiatus is an oval opening [1] in (sources differ) the right crus of the diaphragm [1] /left crus of the diaphragm, with fibres of the right crus looping around the hiatus to form a sling (upon inspiration, this sling would constrict the esophagus, forming a functional (not anatomical) sphincter that prevents gastric contents from refluxing up the esophagus when intra-abdominal ...
Definition of diaphragm in Blount's 1707 Glossographia Anglicana Nova. The diaphragm is an upward curved, c-shaped structure of muscle and fibrous tissue that separates the thoracic cavity from the abdomen. [6] The superior surface of the dome forms the floor of the thoracic cavity, and the inferior surface the roof of the abdominal cavity. [7]
A hiatal hernia or hiatus hernia [2] is a type of hernia in which abdominal organs (typically the stomach) slip through the diaphragm into the middle compartment of the chest. [1] [3] This may result in gastroesophageal reflux disease (GERD) or laryngopharyngeal reflux (LPR) with symptoms such as a taste of acid in the back of the mouth or heartburn.
The crus of diaphragm (pl.: crura), refers to one of two tendinous structures that extends below the diaphragm to the vertebral column. There is a right crus and a left crus, which together form a tether for muscular contraction. They take their name from their leg-shaped appearance – crus meaning leg in Latin.
The aortic hiatus is a midline [1]: 185 opening in the posterior part of the diaphragm giving passage to the descending aorta as well as the thoracic duct, and variably the azygos and hemiazygos veins. [2] It is the lowest and most posterior of the large apertures. [citation needed]
The diaphragm separates the chest from the abdomen. The esophagus (swallowing tube) passes through the hiatal opening in the diaphragm to reach the stomach. With a hiatal hernia, part of the stomach is displaced upwards into the chest (Figure 1). Large hiatal hernias may cause chronic gastrointestinal blood loss leading to iron deficiency anemia.
To the left is the abdomen, where part of the liver and the gall bladder can be seen. The diaphragm is in the middle. To the right is the thorax. The largest object seen in the thorax is the rest of the liver. Just to the right of that is the heart. The liver was connected to itself through a small hole in the diaphragm (not seen). Specialty
The upper limb attaches the esophagus to the superior surface of the diaphragm and the lower limb attaches the cardia region of the stomach to the inferior surface of the diaphragm at the cardiac notch of stomach. The ligament allows independent movement of the diaphragm and esophagus during respiration and swallowing.