Peristalsis


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Related to Peristalsis: Reverse peristalsis

peristalsis

 [per″ĭ-stal´sis]
the wormlike movement by which the alimentary canal or other tubular organs with both longitudinal and circular muscle fibers propel their contents, consisting of a wave of contraction passing along the tube. adj., adj peristal´tic.

When food is swallowed, it passes into the esophagus. Muscular contractions in the wall of the esophagus work the food downward, pushing it into the stomach. Here peristaltic contractions not only move the food in small amounts into the intestine but also aid in the disintegration of the food and help mix it with gastric juice. Peristalsis forces the food into and through the intestine for further digestion until the food waste finally reaches the rectum, from which it is periodically discharged from the body. The waves of peristalsis are irregular; they are stronger at some times than at others. They are also weaker in some people, notably the elderly.

Although the normal peristaltic wave is downward, it is sometimes reversed. Reverse peristaltic action may be triggered by mild digestive upsets or more serious disorders, such as an obstruction in the stomach or intestines.

per·i·stal·sis

(per'i-stal'sis),
The movement of the intestine or other tubular structure, characterized by waves of alternate circular contraction and relaxation of the tube by which the contents are propelled onward.
Synonym(s): vermicular movement
[peri- + G. stalsis, constriction]

peristalsis

(pĕr′ĭ-stôl′sĭs, -stăl′-)
n. pl. peristal·ses (-sēz)
The wavelike muscular contractions of the digestive tract or other tubular structures by which contents are forced onward toward the opening.

per′i·stal′tic (-stôl′tĭk, -stăl′-) adj.
per′i·stal′ti·cal·ly adv.

per·i·stal·sis

(per'i-stal'sis)
The movement of the intestine or other tubular structure, characterized by waves of alternate circular contraction and relaxation of the tube by which the contents are propelled onward.
Synonym(s): vermicular movement.
[peri- + G. stalsis, constriction]

peristalsis

A coordinated succession of contractions and relaxations of the muscular wall of a tubular structure, such as the OESOPHAGUS, small intestine or the URETER, producing a wave-like pattern whose effect is to move the contents along.

peristalsis

the alternate contraction and relaxation of circular and longitudinal muscle which produces waves that pass along the intestine (and other tubular systems) of animals, moving the tube contents in one direction.

Peristalsis

A sequence of muscle contractions that progressively squeeze one small section of the digestive tract and then the next to push food along the tract, something like pushing toothpaste out of its tube.
References in periodicals archive ?
Naloxone stimulates peristalsis in the PNS GI tract, but it impairs the analgesic effect of the opioid in the CNS (Drewes et al., 2016; Sharma & Jamal, 2013).
A high BLOSP is a supportive evidence for a diagnosis of achalasia, and not a defining manometric feature for this condition, which, in turn, is an incomplete LOS relaxation and failure of peristalsis. A reduced BLOSP is rare in achalasia and so is a normal BLOSP.
Smooth muscles in the walls of the ureters send the urine in small spurts into the bladder, in a process called peristalsis. After the urine enters the bladder from the ureters, small folds in the bladder mucosa act like valves to prevent the backward flow of urine (Lumen Learning, 2016).
There was no significant change after ESD in CFV and DL (which evaluate contraction wave pattern), IBP and IRP (which evaluate EGJ relaxation), or PB (which indicates peristalsis deficit length; Table 3).
noted that while identifying dilated bowel loops is essential, there is an increased likelihood for diagnostic accuracy when there is also abnormal peristalsis. This study also reported that sonography has the potential to be used as an alternative method to identify SBO [15].
The indicators such as duration of operation, intraoperative blood loss, time to recovery of peristalsis and pain score in the observation group were superior to those of the control group, and the difference had statistical significance (P<0.05; Table-I).
Non-lead point intussusceptions are assumed to be secondary to dysrhythmic peristalsis and are commonly seen in patients with inflammatory bowel disease.
Due to its close proximity with the pharyngeal muscles, there is a probability that it augments the pharyngeal muscles and thereby pharyngeal peristalsis. However, the effectiveness of modified Shaker exercise in improving pharyngeal peristalsis is not studied so far.
The flow of urine is partially achieved through peristalsis along with hydrostatic pressure [1].
However, it is believed that the process starts when a lesion in the intestinal wall or an irritant in the lumen changes the intestinal peristalsis [3-5].
First, impaired ureteral peristalsis resulting in inadequate urine drainage might be the reason.
Suggestions including Gastro Telegraph, Endomanifesto, G-Tract, Tums-Bums, Digestum, Peristalsis, The Digest, Gastrograph and Inner Voyage.