Synonyms for myenteric or Related words with myenteric
Examples of "myenteric"
The neurons of the ENS are collected into two types of ganglia:
(Auerbach's) and submucosal (Meissner's) plexuses.
plexuses are located between the inner and outer layers of the muscularis externa, while submucosal plexuses are located in the submucosa.
Sample paper from Google Scholar: [HTML] Two types of neurones in the
plexus of duodenum in the guinea-pig
Between the two muscle layers is the
plexus. This controls peristalsis. Activity is initiated by the pacemaker cells, (
interstitial cells of Cajal). The gut has intrinsic peristaltic activity (basal electrical rhythm) due to its self-contained enteric nervous system. The rate can be modulated by the rest of the autonomic nervous system.
Since many of the same neurotransmitters are found in the ENS as the brain, it follows that
neurons can express receptors for both peptide and non-peptide (amines, amino acids, purines) neurotransmitters. Generally, expression of a receptor is limited to a subset of
neurons, with probably the only exception being expression of nicotinic cholinergic receptors on all
neurons. One receptor that has been targeted for therapeutic reasons has been the 5-hydroxytryptamine (5-HT) receptor. Activating this pre-synaptic receptor enhances cholinergic neurotransmission and can stimulate gastrointestinal motility.
Achalasia is a motor disorder of the esophagus characterized by decrease in ganglion cell density in the
plexus. The cause of the lesion is unknown.
According to preclinical studies, 30% of
plexus' neurons are enteric sensory neurons, thus Auerbach's plexus has also a sensory component.
Loperamide is an opioid-receptor agonist and acts on the μ-opioid receptors in the
plexus of the large intestine. Loperamide works similarly to morphine, decreasing the activity of the
plexus, which decreases the tone of the longitudinal and circular smooth muscles of the intestinal wall. This increases the time material stays in the intestine, allowing more water to be absorbed from the fecal matter. Loperamide also decreases colonic mass movements and suppresses the gastrocolic reflex.
The submucous plexus (Meissner's plexus, plexus of the submucosa, plexus submucosus) lies in the submucosa of the intestinal wall. The nerves of this plexus are derived from the
plexus which itself is derived from the plexuses of parasympathetic nerves around the superior mesenteric artery. Branches from the
plexus perforate the circular muscle fibers to form the submucous plexus. Ganglia from the plexus extend into the muscularis mucosae and to the mucous membrane.
Biopsy, the removal of a tissue sample during endoscopy, is not typically necessary in achalasia but if performed shows hypertrophied musculature and absence of certain nerve cells of the
plexus, a network of nerve fibers that controls esophageal peristalsis.
A part of the enteric nervous system, the
plexus exists between the longitudinal and circular layers of muscularis externa in the gastrointestinal tract. It is found in the muscles of the esophagus, stomach, and intestine.
Serotonin in mammals is made by two different tryptophan hydroxylases: TPH1 produces serotonin in the pineal gland and the enterochromaffin cells, while TPH2 produces it in the Raphe nuclei and in the
plexus originates in the medulla oblongata as a collection of neurons from the ventral part of the brain stem. The vagus nerve then carries the axons to their destination in the gastrointestinal tract.
He is credited with the discovery of "Plexus myentericus Auerbachi", or Auerbach's plexus, a layer of ganglion cells that provide control of movements of the gastro-intestinal tract, also known as the "
They contain Dogiel cells. The nerve bundles of the submucous plexus are finer than those of the
plexus. Its function is to innervate cells in the epithelial layer and the smooth muscle of the muscularis mucosae.
In patients who have no response to medical or endoscopic therapy, surgery can be performed. A Heller myotomy involves an incision to disrupt the LES and the
plexus that innervates it. The Heller myotomy is used as a final treatment option in patients who do not respond to other therapies.
It arises from cells in the vagal trigone also known as the nucleus ala cinerea, the parasympathetic nucleus of origin for the tenth cranial nerve (vagus nerve), located in the medulla oblongata. The fibers are carried by both the anterior and posterior vagal nerves. The
plexus is the major nerve supply to the gastrointestinal tract and controls GI tract motility.
The interstitial cell of Cajal (ICC) is a type of interstitial cell found in the gastrointestinal tract. There are different types with different functions.
Interstitial cells of Cajal (ICC-MY) serve as a pacemaker which creates the bioelectrical slow wave potential that leads to contraction of the smooth muscle.
Achalasia is a major exception to usual pattern of dysphagia in that swallowing of fluid tends to cause more difficulty than swallowing solids. In achalasia, there is idiopathic destruction of parasympathetic ganglia of the Auerbach's (
) plexus of the entire esophagus, which results in functional narrowing of the lower esophagus, and peristaltic failure throughout its length.
plexus (or Auerbach's plexus) provides motor innervation to both layers of the muscular layer of the gut, having both parasympathetic and sympathetic input (although present ganglionar cell bodies belong to parasympathetic innervation, fibers from sympathetic innervation also reach the plexus), whereas the submucous plexus has only parasympathetic fibers and provides secretomotor innervation to the mucosa nearest the lumen of the gut.
Surrounding this is the muscular layer, which comprises both longitudinal and circular smooth muscle that also helps with continued peristalsis and the movement of digested material out of and along the gut. In between the two layers of muscle lies the
plexus (Auerbach's plexus).
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