nerve supply of liver
Reading File
Finding Sources
Finding Sources
Reading File
Reading File
Reading File
Here is a comprehensive account of the nerve supply of the liver:
Nerve Supply of the Liver
Source: Hepatic Plexus
The liver receives exclusively autonomic (involuntary) innervation via the hepatic plexus, which is a continuation of the celiac (solar) plexus.
The hepatic plexus travels along the hepatic artery and portal vein within the hepatoduodenal ligament to reach the porta hepatis.
— Color Atlas of Human Anatomy, Vol. 2
Sympathetic Supply
| Component | Detail |
|---|---|
| Preganglionic fibers | Spinal cord segments T5–T10 |
| Route | Via greater splanchnic nerve → celiac ganglia → celiac plexus → hepatic plexus |
| Distribution | Primarily to hepatic arteries (vasomotor control) |
The hepatic arteries are principally supplied by sympathetic fibers.
— Sabiston Textbook of Surgery; Miller's Anesthesia
Parasympathetic Supply
| Component | Detail |
|---|---|
| Source | Vagus nerve (CN X) — both left and right vagal trunks |
| Route | Vagal branches → hepatic branches → hepatic plexus |
| Function | Hepatic glucose metabolism regulation; bile secretion modulation |
The vagus nerve supplies parasympathetic innervation to the liver, gallbladder, and extrahepatic bile ducts. Signals via vagal afferents and efferents participate in hepatic glucose production — efferent vagal fibers act via N-methyl-D-aspartate (NMDA)-dependent glutamatergic neurotransmission to reduce hepatic glucose output.
— Guyton & Hall Textbook of Medical Physiology; Sleisenger & Fordtran's GI and Liver Disease
Summary Table (Autonomic Innervation)
| Type | Origin | Route |
|---|---|---|
| Sympathetic (motor + sensory) | T5–T10 | Greater splanchnic nerve → celiac plexus → hepatic plexus |
| Parasympathetic | Vagus nerve (CN X) | Hepatic branches of vagus → hepatic plexus |
Clinical Points
- Pain from liver distension: Acute stretching of the liver capsule (Glisson's capsule) causes right upper quadrant pain, which may be referred to the right shoulder via phrenic nerve innervation of the diaphragmatic peritoneum (C3–C5).
- Gallbladder and bile ducts: Unlike the hepatic arteries (sympathetic only), the gallbladder and extrahepatic bile ducts receive both sympathetic and parasympathetic innervation.
- The hepatic plexus accompanies branches of the portal triad into the liver parenchyma, influencing vascular tone, bile flow, and metabolic activity.
— Sabiston Textbook of Surgery; Miller's Anesthesia
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