The curvatures of the stomach
refer to the greater and lesser curvatures. The greater curvature
of the stomach is four or five times as long as the lesser curvature
The greater curvature of the stomach forms the lower left or lateral border of the stomach
Starting from the cardiac orifice
at the incisura cardiaca
, it forms an arch backward, upward, and to the left; the highest point of the convexity is on a level with the sixth left costal cartilage
From this level it may be followed downward and forward, with a slight convexity to the left as low as the cartilage of the ninth rib; it then turns to the right, to the end of the pylorus
Directly opposite the incisura angularis of the lesser curvature the greater curvature presents a dilatation, which is the left extremity of the pyloric part; this dilatation is limited on the right by a slight groove, the sulcus intermedius
, which is about 2.5 cm, from the duodenopyloric constriction
The portion between the sulcus intermedius and the duodenopyloric constriction is termed the pyloric antrum
At its commencement the greater curvature is covered by peritoneum
continuous with that covering the front of the organ.
The left part of the curvature gives attachment to the gastrolienal ligament
, while to its anterior portion are attached the two layers of the greater omentum
, separated from each other by the gastroepiploic vessels.
There are three arteries which primarily supply the greater curvature:
* short gastric arteries
— upper part
and the gastroepiploic vessels:
* gastric branches of left gastro-omental artery
— middle part
* gastric branches of right gastro-omental artery
— lower part
The lesser curvature of the stomach forms the upper right or medial border of the stomach
The lesser curvature of the stomach travels between the cardiac
and pyloric orifice
s. It descends as a continuation of the right margin of the esophagus
in front of the fibers of the right crus of the diaphragm
, and then, turning to the right, it crosses the first lumbar vertebra
and ends at the pylorus
Nearer its pyloric than its cardiac end is a well-marked notch, the ''incisura angularis'', which varies somewhat in position with the state of distension of the viscus; it serves to separate the stomach into a right and a left portion.
The lesser curvature gives attachment to the two layers of the hepatogastric ligament
– part of the lesser omentum
, and between these two layers are the left gastric artery
and the right gastric branch of the hepatic artery
File:Slide18tata.JPG|Stomach. Lesser curvature.Deep dissection.
File:Slide20tata.JPG|Stomach. Greater curvature.Deep dissection.