The subesophageal is a nerve cell nodes ( ganglion ) in the nervous system of higher insects. It is located in the head below the esophagus and is characterized by two nerves, the Schlundkonnektiven, with the Oberschlundganglion and other connectives connected with the ganglia of the following segments.
The subesophageal formed from the three ganglia through which the mouthparts are supplied. It is the Mandibularganglion ( mandibular ganglion ), the Maxillarganglion ( maxillary ganglion ) and the Labialganglion ( labial ganglion ), which are still single ganglion in crustaceans and insects original. In some orders of insects the subesophageal is with the rear part of the upper pharyngeal ganglion, the tritocerebrum merged.
The term subesophageal is applied by analogy to other arthropods, but the subesophageal may include other segments as in insects there. In the prosoma of most arachnids all leg ganglia are fused into a single subesophageal connected forward a pair of short, thick Schlundkonnektive with the Oberschlundganglion.
Even with many crustaceans occur the ganglia of mouthparts ( mandibles, 1.Maxille, 2.Maxille ) together into a unified subesophageal. Trunk ganglia may be affiliated with this subesophageal. Particularly evident comes to light in crabs, where both ganglia of mouthparts as well as all body ganglia are fused into a single subesophageal, the front via a pair of long, slender Schlundkonnektive is connected to the Oberschlundganglion.