Block 6 Anatomy Stomach Spleen Umich W Expl

1. During a full workup on a 2-month-old infant with a history of intermittent gastrointestinal pain and vomiting, physicians discovered that the cause was lack of emptying of the stomach. They immediately suspected that the cause was a spasmodic contraction of which of the following parts of the stomach?

Cardiac notch

Fundus

Lesser curvature

Pylorus

Rugae

Pyloric stenosis is a congenital disorder in which the pylorus is thickened causing obstruction of the gastric outlet to the duodenum. This problem is more commonly seen in males. Symptoms like projectile vomiting appear several weeks after birth.

Explanation

Pyloric stenosis is a congenital disorder in which the pylorus is thickened causing obstruction of the gastric outlet to the duodenum. This problem is more commonly seen in males. Symptoms like projectile vomiting appear several weeks after birth.

2. A twenty-year-old woman was broad-sided on the driver side by an SUV and was taken to the hospital emergency room. Examination showed low blood pressure and tenderness on the left mid-axillary line. Also, a large swelling was felt protruding downward and medially below the left costal margin. X-rays revealed that her 9th and 10th ribs were fractured near their angles on the left side. The abdominal organ most likely to be injured by the fracture is:

Descending colon

Left kidney

Pancreas

Spleen

Stomach

The spleen is usually well protected by the 9th through 12th ribs on the left side. But, if one or more of these ribs gets fractured, the spleen is the first organ to be ruptured. The spleen can also be damaged if there is blunt trauma to the abdomen or a sudden increase in intraabdominal pressure. This patient has several symptoms of a ruptured spleen--she has tenderness on the left posterior axillary line and hypotension. (Because of its spongy parenchyma and thin capsule, a ruptured spleen will bleed profusely and a patient may become hypotensive.) The stomach, splenic flexure of the colon, tail of the pancreas, left kidney, and suprarenal gland are in the same quadrant of the abdomen, and they are also at risk for injury. But, you should remember that the spleen is at greatest risk because of its close relationship with the 9th through 12th ribs.

Explanation

The spleen is usually well protected by the 9th through 12th ribs on the left side. But, if one or more of these ribs gets fractured, the spleen is the first organ to be ruptured. The spleen can also be damaged if there is blunt trauma to the abdomen or a sudden increase in intraabdominal pressure. This patient has several symptoms of a ruptured spleen--she has tenderness on the left posterior axillary line and hypotension. (Because of its spongy parenchyma and thin capsule, a ruptured spleen will bleed profusely and a patient may become hypotensive.) The stomach, splenic flexure of the colon, tail of the pancreas, left kidney, and suprarenal gland are in the same quadrant of the abdomen, and they are also at risk for injury. But, you should remember that the spleen is at greatest risk because of its close relationship with the 9th through 12th ribs.

3. A patient was diagnosed with bleeding ulcer of the lesser curvature of the stomach. Which artery is most likely involved?

Gastroduodenal

Left gastric

Left gastro-omental (epiploic)

Right gastro-omental (epiploic)

Short gastric

The left gastric artery is the artery that supplies the lesser curvature of the stomach (along with the right gastric artery.) These two arteries would be most likely to cause bleeding at the lesser curvature of the stomach. The left gastric is one of the three arteries that comes off of the celiac trunk. The left and right gastro-omental arteries are the two arteries that supply the greater curvature of the stomach. The gastroduodenal artery is a branch off the common hepatic artery that supplies the duodenum, head of the pancreas, and the greater curvature of the stomach. The short gastric arteries are 4 or 5 small arteries from the splenic artery that supply the fundus of the stomach.

Explanation

The left gastric artery is the artery that supplies the lesser curvature of the stomach (along with the right gastric artery.) These two arteries would be most likely to cause bleeding at the lesser curvature of the stomach. The left gastric is one of the three arteries that comes off of the celiac trunk. The left and right gastro-omental arteries are the two arteries that supply the greater curvature of the stomach. The gastroduodenal artery is a branch off the common hepatic artery that supplies the duodenum, head of the pancreas, and the greater curvature of the stomach. The short gastric arteries are 4 or 5 small arteries from the splenic artery that supply the fundus of the stomach.

4. The spleen contacts all of the following organs EXCEPT:

Jejunum

Kidney

Left colic flexure

Tail of the pancreas

Stomach

The spleen is not in contact with the jejunum. The jejunum lies medial and inferior to the spleen. The kidney is in contact with the posteromedial surface of the spleen. The left colic flexure is in contact with the inferomedial surface of the spleen. The tail of the pancreas touches the hilum of the spleen. The stomach is in contact with the anteromedial surface of the spleen. See Netter Plate 289 for a picture of the different impressions on the spleen.

Explanation

The spleen is not in contact with the jejunum. The jejunum lies medial and inferior to the spleen. The kidney is in contact with the posteromedial surface of the spleen. The left colic flexure is in contact with the inferomedial surface of the spleen. The tail of the pancreas touches the hilum of the spleen. The stomach is in contact with the anteromedial surface of the spleen. See Netter Plate 289 for a picture of the different impressions on the spleen.

5. A patient presented with a swollen spleen, which protruded medially toward the umbilicus in the abdomen. A vertical and downward expansion of the spleen was resisted by the:

Tail of the pancreas

Left colic flexure

Left kidney

Left renal artery

Stomach

The left colic flexure, also called the splenic flexure, is the point where the colon takes a sharp downward turn. This flexure is the point where the transverse colon ends and the descending colon begins. It is located immediately inferior to the spleen, so an enlarged spleen must move medially to avoid this colic flexure. The stomach lies medial to the speen, and the tail of the pancreas inserts into the hilum of the spleen. These organs would not prevent the spleen from descending inferiorly. The kidney and left renal artery are retroperitoneal organs; they would not obstruct movement of the spleen.

Explanation

The left colic flexure, also called the splenic flexure, is the point where the colon takes a sharp downward turn. This flexure is the point where the transverse colon ends and the descending colon begins. It is located immediately inferior to the spleen, so an enlarged spleen must move medially to avoid this colic flexure. The stomach lies medial to the speen, and the tail of the pancreas inserts into the hilum of the spleen. These organs would not prevent the spleen from descending inferiorly. The kidney and left renal artery are retroperitoneal organs; they would not obstruct movement of the spleen.

6. A 60-year-old male executive who had a history of a chronic duodenal ulcer was admitted to the ER exhibiting signs of a severe internal hemorrhage. He was quickly diagnosed with perforation of the posterior wall of the first part of the duodenum and erosion of an artery behind it by the gastric expellent. The artery is most likely the:

Common hepatic

Gastroduodenal

Left gastric

Proper hepatic

Superior mesenteric

For a good understanding of this question, take a look at Netter Plate 290. The gastroduodenal artery is a branch of the common hepatic artery; it descends behind the first part of the duodenum. So, if an ulcer destroyed the posterior wall of the duodenum, gastric juices could escape and destroy the gastroduodenal artery. The common hepatic artery is a branch of the celiac trunk found superior to the duodenum. The left gastric artery is a branch of the celiac trunk which supplies the left side of the lesser curvature of the stomach. The proper hepatic artery is a branch of the common hepatic artery; it travels superiorly from the common hepatic artery to give off the right, middle, and left hepatic arteries. Finally, the superior mesenteric artery originates from the aorta at the bottom of the L1 level, posterior to the pancreas. It travels over the 3rd part of the duodenum and supplies the intestines, up to the last third of the transverse colon.

Explanation

For a good understanding of this question, take a look at Netter Plate 290. The gastroduodenal artery is a branch of the common hepatic artery; it descends behind the first part of the duodenum. So, if an ulcer destroyed the posterior wall of the duodenum, gastric juices could escape and destroy the gastroduodenal artery. The common hepatic artery is a branch of the celiac trunk found superior to the duodenum. The left gastric artery is a branch of the celiac trunk which supplies the left side of the lesser curvature of the stomach. The proper hepatic artery is a branch of the common hepatic artery; it travels superiorly from the common hepatic artery to give off the right, middle, and left hepatic arteries. Finally, the superior mesenteric artery originates from the aorta at the bottom of the L1 level, posterior to the pancreas. It travels over the 3rd part of the duodenum and supplies the intestines, up to the last third of the transverse colon.

7. You are observing an operation to remove the left suprarenal gland. To expose the gland the surgeon mobilizes the descending colon by cutting along its lateral attachment to the body wall and dissecting medialward in the fusion fascia behind it. Suddenly the operative field is filled with blood. The surgeon realizes he has failed to cut a mesenteric attachment between the left colic flexure and another organ. As a result of the traction, the surface of the organ tore. Which organ was injured?

Duodenum

Kidney

Liver

Spleen

Suprarenal gland

The spleen is a peritonealized organ that is attached to the left colic flexure. It could tear if there was too much traction while pulling the descending colon away from the body wall. Another clue in this scenario that points to a ruptured spleen is the large amount of blood that fills the operative field. The spleen is covered by a very thin capsule, and it has a soft and pulpy parenchyma. So, when it is ruptured, the spleen bleeds profusely. The duodenum and liver are not associated with the left colic flexure. The kidney and suprarenal glands are retroperitoneal organs that are not associated with any mesenteric attachment.

Explanation

The spleen is a peritonealized organ that is attached to the left colic flexure. It could tear if there was too much traction while pulling the descending colon away from the body wall. Another clue in this scenario that points to a ruptured spleen is the large amount of blood that fills the operative field. The spleen is covered by a very thin capsule, and it has a soft and pulpy parenchyma. So, when it is ruptured, the spleen bleeds profusely. The duodenum and liver are not associated with the left colic flexure. The kidney and suprarenal glands are retroperitoneal organs that are not associated with any mesenteric attachment.

8. Which is not a boundary of the epiploic (omental) foramen?

Aorta

Caudate lobe of the liver

First part of the duodenum

Hepatoduodenal ligament

The epiploic (omental) foramen is a passageway between the greater peritoneal sac and the lesser peritoneal sac. It is located posterior to the hepatoduodenal ligament and the first part of the duodenum. The caudate lobe of the liver forms the posterior wall of the epiploic foramen. The aorta is retroperiteoneal, and it does not form a boundary of this foramen

Explanation

The epiploic (omental) foramen is a passageway between the greater peritoneal sac and the lesser peritoneal sac. It is located posterior to the hepatoduodenal ligament and the first part of the duodenum. The caudate lobe of the liver forms the posterior wall of the epiploic foramen. The aorta is retroperiteoneal, and it does not form a boundary of this foramen

9. The spleen:

Develops in the dorsal mesogastrium

Develops in the ventral mesogastrium

Develops in both the dorsal and ventral mesogastria

Is always retroperitoneal

Becomes retroperitoneal during its development

The spleen and pancreas develop behind the stomach in the dorsal mesogastrium; the liver develops in the ventral mesogastrium. The spleen is not a retroperitoneal organ--it is covered by visceral peritoneum on all its surfaces.

Explanation

The spleen and pancreas develop behind the stomach in the dorsal mesogastrium; the liver develops in the ventral mesogastrium. The spleen is not a retroperitoneal organ--it is covered by visceral peritoneum on all its surfaces.

10. Which of the following structures does not lie at least partially in the retroperitoneum?

Adrenal gland

Duodenum

Kidney

Pancreas

Spleen

The spleen is the only organ listed which is covered entirely by visceral peritoneum. About the other organs... The kidney and suprarenal glands are retroperitoneal organs. This is different than the secondarily retroperitoneal organs that started out in a mesentery and then got pushed against the posterior wall. The kidneys and the suprarenal glands began developing in the retroperitoneum and stayed there. The duodenum and pancreas are partially peritonealized and partially retroperitoneal. The first two centimeters of the superior duodenum is peritonealized, but the rest of the duodenum, until the duodenojejunal junction, is retroperitoneal. For the most part, the pancreas is secondarily retroperitoneal, although the tail of the pancreas is peritonealized, lying within the splenorenal ligament.

Explanation

The spleen is the only organ listed which is covered entirely by visceral peritoneum. About the other organs... The kidney and suprarenal glands are retroperitoneal organs. This is different than the secondarily retroperitoneal organs that started out in a mesentery and then got pushed against the posterior wall. The kidneys and the suprarenal glands began developing in the retroperitoneum and stayed there. The duodenum and pancreas are partially peritonealized and partially retroperitoneal. The first two centimeters of the superior duodenum is peritonealized, but the rest of the duodenum, until the duodenojejunal junction, is retroperitoneal. For the most part, the pancreas is secondarily retroperitoneal, although the tail of the pancreas is peritonealized, lying within the splenorenal ligament.

11. During emergency surgery, it was found that a chronic gastric ulcer had perforated the posterior wall of the stomach and eroded a large artery running immediately posterior to the stomach. The artery is the:

Gastroduodenal

Common hepatic

Left gastroepiploic

Splenic

Superior mesenteric

Netter Plate 288 will help you to understand this answer. The splenic artery is a branch of the celiac trunk. It passes deep to the stomach and sends branches to the pancreas before reaching the spleen. If the posterior wall of the stomach eroded, gastric juices could damage the splenic artery. The gastroduodenal artery lies behind the first portion of the duodenum. An ulcer in this portion of the duodenum might jeopardize the gastroduodenal artery. The common hepatic artery is a branch of the celiac trunk which runs superior to the lesser curvature of the stomach. The left gastroepiploic artery runs on the left side of the greater curvature of the stomach. Finally, the superior mesenteric artery arises from the aorta at the L1 level, posterior to the pancreas. It crosses over the third portion of the duodenum.

Explanation

Netter Plate 288 will help you to understand this answer. The splenic artery is a branch of the celiac trunk. It passes deep to the stomach and sends branches to the pancreas before reaching the spleen. If the posterior wall of the stomach eroded, gastric juices could damage the splenic artery. The gastroduodenal artery lies behind the first portion of the duodenum. An ulcer in this portion of the duodenum might jeopardize the gastroduodenal artery. The common hepatic artery is a branch of the celiac trunk which runs superior to the lesser curvature of the stomach. The left gastroepiploic artery runs on the left side of the greater curvature of the stomach. Finally, the superior mesenteric artery arises from the aorta at the L1 level, posterior to the pancreas. It crosses over the third portion of the duodenum.

12. The fundus of the stomach receives its arterial supply from the:

Common hepatic

Inferior phrenic

Left gastroepiploic

Right gastric

Splenic

As it enters the hilum of the spleen, the splenic artery gives off short gastric arteries which supply blood to the fundus of the stomach. These short gastric arteries travel in the gastrosplenic ligament to reach the fundus. The common hepatic artery does not directly supply the stomach--it gives off the gastroduodenal artery, which supplies the right portion of the greater curvature of the stomach with the right gastro-omental artery. The inferior phrenic artery is a branch of the aorta which supplies blood to the diaphragm. The left gastro-omental artery is a branch of the splenic artery which supplies the left half of the greater curvature. The right gastric artery is a branch of the proper hepatic artery which supplies the right half of the lesser curvature. See Netter Plate 290 to get a good picture of these arteries and their areas of distribution.

Explanation

As it enters the hilum of the spleen, the splenic artery gives off short gastric arteries which supply blood to the fundus of the stomach. These short gastric arteries travel in the gastrosplenic ligament to reach the fundus. The common hepatic artery does not directly supply the stomach--it gives off the gastroduodenal artery, which supplies the right portion of the greater curvature of the stomach with the right gastro-omental artery. The inferior phrenic artery is a branch of the aorta which supplies blood to the diaphragm. The left gastro-omental artery is a branch of the splenic artery which supplies the left half of the greater curvature. The right gastric artery is a branch of the proper hepatic artery which supplies the right half of the lesser curvature. See Netter Plate 290 to get a good picture of these arteries and their areas of distribution.

13. Which ligament is a derivative of the dorsal mesogastrium?

Coronary

Falciform

Hepatoduodenal

Hepatogastric

Gastrocolic

Structures involving the spleen and posterior part of the developing stomach (which becomes the greater curvature) are derived from the dorsal mesogastrium. This includes the gastrocolic ligament (including the omental apron), gastrophrenic ligament, gastrosplenic ligament, and the splenorenal ligament. The liver develops in the ventral mesogastrium. This means that any structures involving the liver and its attachment to the lesser curvature of the stomach or the body wall will be derivatives of the ventral mesogastrium. This includes the coronary ligament, the falciform ligament, the left and right triangular ligaments, the hepatogastric ligament, and the hepatoduodenal ligament.

Explanation

Structures involving the spleen and posterior part of the developing stomach (which becomes the greater curvature) are derived from the dorsal mesogastrium. This includes the gastrocolic ligament (including the omental apron), gastrophrenic ligament, gastrosplenic ligament, and the splenorenal ligament. The liver develops in the ventral mesogastrium. This means that any structures involving the liver and its attachment to the lesser curvature of the stomach or the body wall will be derivatives of the ventral mesogastrium. This includes the coronary ligament, the falciform ligament, the left and right triangular ligaments, the hepatogastric ligament, and the hepatoduodenal ligament.

14. Which is a derivative of the dorsal mesogastrium?

Falciform ligament

Hepatoduodenal ligament

Hepatogastric ligament

Greater omentum

Lesser omentum

During the development of the gut, there are two mesogastria attaching to the developing stomach: the dorsal mesogastrium and the ventral mesogastrium. Different organs begin to develop in each mesogastrium--the spleen and pancreas develop in the dorsal mesogastrium and the liver develops in the ventral mesogastrium. So, the structures involving the spleen and the posterior part of the developing stomach (which becomes the greater curvature) are derived from the dorsal mesogastrium. These include: the greater omentum (gastrophrenic ligament, gastrosplenic ligament, gastrocolic ligament) and splenorenal ligament. The structures involved with the liver and its attachment to the stomach wall form the ventral mesogastrium. These include the lesser omentum (hepatogastric ligament, hepatoduodenal ligament) and the ligaments of the liver (falciform ligament, coronary ligaments, right and left triangular ligaments). Of the answer choices, only the greater omentum is part of the dorsal mesogastrium.

Explanation

During the development of the gut, there are two mesogastria attaching to the developing stomach: the dorsal mesogastrium and the ventral mesogastrium. Different organs begin to develop in each mesogastrium--the spleen and pancreas develop in the dorsal mesogastrium and the liver develops in the ventral mesogastrium. So, the structures involving the spleen and the posterior part of the developing stomach (which becomes the greater curvature) are derived from the dorsal mesogastrium. These include: the greater omentum (gastrophrenic ligament, gastrosplenic ligament, gastrocolic ligament) and splenorenal ligament. The structures involved with the liver and its attachment to the stomach wall form the ventral mesogastrium. These include the lesser omentum (hepatogastric ligament, hepatoduodenal ligament) and the ligaments of the liver (falciform ligament, coronary ligaments, right and left triangular ligaments). Of the answer choices, only the greater omentum is part of the dorsal mesogastrium.

15. While performing emergency surgery to control hemorrhage brought on by arterial erosion caused by a duodenal ulcer, surgeons ligated the badly damaged gastroduodenal artery near its origin, which affected all of its branches as well. Assuming "average anatomy", in which of the following arteries would blood now flow in retrograde fashion (backwards) from collateral sources?

Left hepatic

Right gastroepiploic

Short gastric

Left gastric

Omental branches

If the gastroduodenal artery and its branches were ligated, blood would flow in a retrograde direction from the left gastroepiploic artery, which is a branch of the splenic artery, to the right gastroepiploic artery, a ligated branch of the gastroduodenal artery. This flow from the left to right gastroepiploic artery would allow blood to reach the entire greater curvature of the stomach. Remember--there are many anastomoses around the stomach that will allow this organ to receive blood even if one branch is ligated.
The left hepatic artery is a branch of the proper hepatic artery; it supplies blood to the left and quadrate lobes of the liver, as well as part of the caudate lobe. The short gastric arteries are branches of the splenic artery which supply the fundus of the stomach. The left gastric artery is a branch of the celiac trunk which supplies the left portion of the lesser curvature. Omental branches are branches of the left and right gastroomental arteries which supply the greater omentum.

Explanation

If the gastroduodenal artery and its branches were ligated, blood would flow in a retrograde direction from the left gastroepiploic artery, which is a branch of the splenic artery, to the right gastroepiploic artery, a ligated branch of the gastroduodenal artery. This flow from the left to right gastroepiploic artery would allow blood to reach the entire greater curvature of the stomach. Remember--there are many anastomoses around the stomach that will allow this organ to receive blood even if one branch is ligated.
The left hepatic artery is a branch of the proper hepatic artery; it supplies blood to the left and quadrate lobes of the liver, as well as part of the caudate lobe. The short gastric arteries are branches of the splenic artery which supply the fundus of the stomach. The left gastric artery is a branch of the celiac trunk which supplies the left portion of the lesser curvature. Omental branches are branches of the left and right gastroomental arteries which supply the greater omentum.

16. Which of the following is NOT in contact with the spleen?

Colon

Diaphragm

Duodenum

Pancreas

Stomach

The duodenum is not in contact with the spleen. The inferior portion of the spleen contacts the left colic flexure. The superior portion of the spleen contacts the diaphragm--the spleen is convexly curved to fit the concavity of the diaphragm. The tail of the pancreas inserts into the hilum of the spleen. The stomach contacts the anteriomedial portion of the spleen. You should really know what organs contact the spleen and where these organs contact the spleen!

Explanation

The duodenum is not in contact with the spleen. The inferior portion of the spleen contacts the left colic flexure. The superior portion of the spleen contacts the diaphragm--the spleen is convexly curved to fit the concavity of the diaphragm. The tail of the pancreas inserts into the hilum of the spleen. The stomach contacts the anteriomedial portion of the spleen. You should really know what organs contact the spleen and where these organs contact the spleen!

17. While performing a splenectomy (removal of the spleen) following an automobile accident, the surgeons were especially attentive to locate and preserve the tail of the pancreas which is closely associated with the spleen. This they found in the:

Gastrocolic ligament

Gastrosplenic ligament

Phrenicocolic ligament

Splenorenal ligament

Transverse mesocolon

The splenorenal ligament is the peritoneal structure that connects the spleen to the posterior abdominal wall over the left kidney. It also contains the tail of the pancreas. The gastrocolic ligament connects the greater curvature of the stomach with the transverse colon. The gastrosplenic ligament connects the greater curvature of the stomach with the hilum of the spleen. The phrenicolic ligament connects the splenic flexure of the colon to the diaphragm. Finally, the transverse mesocolon connects the transverse colon to the posterior abdominal wall.

Explanation

The splenorenal ligament is the peritoneal structure that connects the spleen to the posterior abdominal wall over the left kidney. It also contains the tail of the pancreas. The gastrocolic ligament connects the greater curvature of the stomach with the transverse colon. The gastrosplenic ligament connects the greater curvature of the stomach with the hilum of the spleen. The phrenicolic ligament connects the splenic flexure of the colon to the diaphragm. Finally, the transverse mesocolon connects the transverse colon to the posterior abdominal wall.

18. During an emergency splenectomy, the surgeon accidentally tore the gastrosplenic ligament and its contents. The artery (ies) likely to be damaged in this event is (are) the:

Left gastric

Splenic

Short gastric

Middle colic

Caudal pancreatic

The short gastric arteries branch from the splenic artery near the hilum of the spleen. They travel in the gastrosplenic ligament to supply the fundus of the stomach. So, these arteries might be damaged if the gastrosplenic ligament was disrupted. The left gastric artery is a branch of the celiac trunk which supplies the left half of the lesser curvature. The splenic artery travels deep to the stomach to reach the hilum of the spleen. Although its branches travel in the gastrosplenic ligament, the splenic artery passes within the splenorenal ligament to reach the splenic hilum, and it would not be damaged by an incision in gastrosplenic ligament. The middle colic artery is a branch of the superior mesenteric artery which supplies the transverse colon. The caudal pancreatic artery is a branch of the splenic artery which supplies the tail of the pancreas. It, along with most of the pancreas, is retroperitoneal.

Explanation

The short gastric arteries branch from the splenic artery near the hilum of the spleen. They travel in the gastrosplenic ligament to supply the fundus of the stomach. So, these arteries might be damaged if the gastrosplenic ligament was disrupted. The left gastric artery is a branch of the celiac trunk which supplies the left half of the lesser curvature. The splenic artery travels deep to the stomach to reach the hilum of the spleen. Although its branches travel in the gastrosplenic ligament, the splenic artery passes within the splenorenal ligament to reach the splenic hilum, and it would not be damaged by an incision in gastrosplenic ligament. The middle colic artery is a branch of the superior mesenteric artery which supplies the transverse colon. The caudal pancreatic artery is a branch of the splenic artery which supplies the tail of the pancreas. It, along with most of the pancreas, is retroperitoneal.

19. In order to do a vagotomy (section of vagal nerve trunks) to reduce the secretion of acid by cells of the stomach mucosa in patients with peptic ulcers, one needs to cut the gastric branches and retain vagal innervation to other abdominal organs. Where would a surgeon look for these branches in relation to the stomach?

Along the gastroepiploic vessels

Along the greater curvature

Along the lesser curvature

In the base of the omental apron

In the gastrocolic ligament

The vagal branches to the stomach are found on the lesser curvature. The anterior vagal branches are derived from the left vagal nerve and the posterior vagal branches are derived from the right vagal nerve. This makes sense, since during the rotation of the gut, the left side of the stomach rotated to become the ventral aspect of the stomach. Vagotomies are done to reduce the acid secretion of the stomach, since the vagus sends one of the signals that stimulates the parietal cells of the stomach to release HCl.

Explanation

The vagal branches to the stomach are found on the lesser curvature. The anterior vagal branches are derived from the left vagal nerve and the posterior vagal branches are derived from the right vagal nerve. This makes sense, since during the rotation of the gut, the left side of the stomach rotated to become the ventral aspect of the stomach. Vagotomies are done to reduce the acid secretion of the stomach, since the vagus sends one of the signals that stimulates the parietal cells of the stomach to release HCl.

20. In order to approach the area posterior to the stomach, a surgeon decided to go through the lesser omentum. Before incising the mesentery she was careful to find and preserve a nerve lying in the upper portion of the hepatogastric ligament, i.e., the

Celiac branch of the anterior vagal trunk

Celiac branch of the posterior vagal trunk

Greater splanchnic branch to the right suprarenal gland

Hepatic branch of the anterior vagal trunk

Hepatic branch of the posterior vagal trunk

The hepatic branch of the anterior vagal trunk travels in the upper portion of the hepatogastric ligament. The posterior vagal trunk supplies a celiac branch deep to the hepatogastric ligament. The greater thoracic splanchnic branches to the suprarenal glands come off the greater thoracic splanchnic nerves as they pass through the diaphragm. Then, the greater thoracic splanchnic nerves continue on to synapse in the celiac ganglia.

Explanation

The hepatic branch of the anterior vagal trunk travels in the upper portion of the hepatogastric ligament. The posterior vagal trunk supplies a celiac branch deep to the hepatogastric ligament. The greater thoracic splanchnic branches to the suprarenal glands come off the greater thoracic splanchnic nerves as they pass through the diaphragm. Then, the greater thoracic splanchnic nerves continue on to synapse in the celiac ganglia.