Okay, let's tackle this question about highly selective vagotomy. The question is asking which part of the stomach's vagal supply is severed in this procedure. First, I need to recall what a highly selective vagotomy involves. From what I remember, vagotomy refers to cutting the vagus nerve, which is part of the parasympathetic nervous system. The stomach has a rich vagal innervation, and different types of vagotomies target different areas.

Highly selective vagotomy, also known as "superselective" vagotomy, is a surgical procedure that aims to treat peptic ulcer disease by removing the vagal branches that stimulate acid secretion. The vagus nerve has two main branches that innervate the stomach: the anterior and posterior vagal trunks. These trunks divide into the hepatic branch and the gastric branches. The hepatic branch goes to the liver and parts of the gallbladder, while the gastric branches go to the stomach.

In a highly selective vagotomy, the goal is to preserve the hepatic branch and the nerve of Latarjet, which innervates the proximal stomach and regulates gastric emptying. The procedure specifically targets the branches that innervate the acid-secreting cells in the distal stomach. So, the branches that are cut are those that supply the antrum and the body of the stomach, which are responsible for acid production. The nerve of Latarjet, which is part of the posterior vagus, is preserved to maintain normal gastric emptying.

Looking at the options, the correct answer should be the branches that supply the antrum and body. The other options might include the hepatic branch, the anterior vagal trunk, or the posterior vagal trunk in general. The hepatic branch is not cut in a highly selective vagotomy, so if an option mentions that, it's incorrect. The anterior vagal trunk might be part of the branches that are cut, but the key is the specificity to the acid-secreting areas.

Wait, the anterior vagal trunk divides into the hepatic branch and the gastric branches. So cutting the gastric branches of the anterior and posterior vagal trunks (excluding the hepatic branch) would be correct. The nerve of Latarjet is part of the posterior vagus, so preserving it is crucial. Therefore, the correct answer would be the branches supplying the antrum and body, which are the ones responsible for acid secretion.

The clinical pearl here is that highly selective vagotomy preserves the hepatic branch and the nerve of Latarjet to prevent complications like delayed gastric emptying. This is different from truncal vagotomy, which cuts all vagal branches and leads to more side effects. So the key is the selective cutting of only the acid-secreting branches.

**Core Concept**
Highly selective vagotomy (also called superselective vagotomy) is a surgical procedure that severs vagal branches supplying the **acid-secreting regions** of the stomach (antrum and body) while preserving those regulating gastric emptying. This targets **parietal cells** responsible for hydrochloric acid secretion, minimizing postoperative complications like delayed emptying.

**Why the Correct Answer is Right**
The vagus nerve innervates the stomach via **anterior and posterior trunks**. The **gastric branches** of these trunks (excluding the hepatic

✓ Correct Answer: B. Antrum