Celiac ganglia

The celiac ganglion ( " Bauchhöhlenganglion ", from Greek Koilia for " cave " ) is a sympathetic ganglion in the upper ( in animals: front ) abdominal cavity. It lies at the origin of the celiac trunk from the aorta in humans at the same level right and left of the aorta. The celiac ganglion is the largest of the prevertebral ganglia ( ganglia prevertebralia ).

Origin of the nerve fibers

The cell body of the presynaptic sympathetic neurons are located mainly in the chest portion of the spinal cord. From here, pull the axons ( axons ) to the sympathetic trunk, but not in the sympathetic chain ganglia ( ganglia paravertebralia ) switched. The neurons accumulate the major splanchnic nerve, which runs parallel to the sympathetic trunk in the abdominal cavity. From the lumbar splanchnic nerves also consider minores ( lumbar ) to the celiac ganglion. Most of these nerve fibers there then switched to the second, post-synaptic neuron.

Solar plexus

The secondary neurons form the artery of a braid, the celiac plexus. Through numerous connections to the braid of closely adjacent superior mesenteric ganglion ( in animals: cranial mesenteric ganglion ) both are grouped together as the solar plexus ( solar plexus or solar plexus). In the solar plexus and the parasympathetic fibers of the vagus nerve radiate a.

Draw from the solar plexus, the sympathetic and parasympathetic nerve fibers accompanied blood vessels to the organs of the upper abdomen ( in animals: the front of the abdominal cavity). There is usually more organ plexuses ( plexus gastricus, hepatic, splenic ... ) in which the remaining part of the primary neurons are switched.

Function

The fibers from the celiac ganglion are both afferent and efferent. The afferent fibers conduct viszerosensible information of the abdominal organs. In the ganglion, there are connections to the efferent neurons. The ganglion acts already as the first central processing station outside the CNS, where it amplifies afferent impulses or inhibits efferent impulses and corresponding triggers. In addition, impulses from various parts of organs go, so that a coordination of the enteric nervous system - a part of the vegetative nervous system - and thus the intestinal motility ( peristalsis) is possible.

The sympathetic nerve fibers act on the blood vessels and thus regulate blood flow to the organs. In addition, they have an inhibitory effect on the function of the gastrointestinal tract.

• Neurobiology
• Autonomic Nervous System
• Digestive Disorders
• Ganglion