Secondary peristalsis is a peristaltic contraction of the esophageal circular muscle which begins without swallowing. Tertiary waves are defined as contractions which occur simultaneously at different levels of the esophagus [1].his secondary wave originates in the esophagus as a result of distension and gives a similar manometric pattern as primary peristalsis. In much of a digestive tract such as the human gastrointestinal tract, smooth muscle tissue contracts in sequence to produce a peristaltic wave, which propels a ball of food (called a bolus while in the esophagus and upper gastrointestinal tract and chyme in the stomach) along the tract.
Secondary peristalsis is a peristaltic contraction of the esophageal circular muscle which begins without swallowing. This secondary wave originates in the esophagus as a result of distension and gives a similar manometric pattern as primary peristalsis. Tertiary waves are defined as contractions which occur simultaneously at different levels of the esophagus [1]. Peristalsis is used to describe the movement of food through the digestive tract. In simplistic terms, it means moving food and liquids within the body from one place to another. These rhythmic, wave-like movements are created by peristaltic muscle contractions which are located within the walls of your digestive tract. 1 First, there is a primary peristaltic wave, which occurs when the bolus enters the esophagus during swallowing. 2  The primary peristaltic wave forces the bolus down the esophagus and into the stomach in a wave lasting about 8–9 seconds. 1 The primary peristaltic wave forces the bolus down the esophagus and into the stomach in a wave lasting about 8–9 seconds. 2  The wave travels down to the stomach even if the bolus of food descends at a greater rate than the wave itself, and continues even if for some reason the bolus gets stuck further up the esophagus. 23. Peristaltic waves are ________. D) waves of muscular contractions that propel contents from one point to another. 24. Gastrin is a digestive hormone that is responsible for the stimulation of acid secretions in the. stomach. These secretions are stimulated by the presence of ________. A time-space diagram of a peristaltic wave after a water swallow. High pressure values are red, zero pressure is blue-green. The ridge in the upper part of the picture is the high pressure of the upper esophageal sphincter which only opens for a short time to let water pass. Peristalsis is a radially symmetrical contraction and relaxation of muscles that propagates in a wave down a tube, in an anterograde direction. 1 The primary peristaltic wave forces the bolus down the esophagus and into the stomach in a wave lasting about 8–9 seconds. 2  The wave travels down to the stomach even if the bolus of food descends at a greater rate than the wave itself, and continues even if for some reason the bolus gets stuck further up the esophagus. In much of a digestive tract such as the human gastrointestinal tract, smooth muscle tissue contracts in sequence to produce a peristaltic wave, which propels a ball of food (called a bolus while in the esophagus and upper gastrointestinal tract and chyme in the stomach) along the tract. 1 The primary peristaltic wave forces the bolus down the esophagus and into the stomach in a wave lasting about 8–9 seconds. 2  The wave travels down to the stomach even if the bolus of food descends at a greater rate than the wave itself, and continues even if for some reason the bolus gets stuck further up the esophagus. Gastrointestinal motility refers to the contraction of the smooth muscles of the gastrointestinal tract. The gastrointestinal tract is commonly divided into 5 parts: the mouth, esophagus, stomach, small intestine, and large intestine (colon). GI Motitility In the Stomach. 1  Two types of movement (motility) occur in the stomach: peristalsis and segmentation (mixing). 2  The contractions occur about every 20 seconds and proceed from the body of the stomach toward the pyloric sphincter. 3  About 20% of the contractions in the stomach are peristaltic waves. A) Churning movements of the gastrointestinal tract B) Waves of muscular contractions that propel contents from one point to another C) Segmental regions of the gastrointestinal tract OR D) Pendular movements of the gastrointestinal tract. As a result, visible peristaltic waves may roll across the abdomen. Typically, these waves appear suddenly and vanish quickly because increased peristalsis overcomes the obstruction or the GI tract becomes atonic. Where Does Peristalsis Occur. Peristalsis occurs throughout the digestive tract. It begins with the primary peristaltic wave in the esophagus as you swallow food from your mouth to the stomach. As food enters your stomach these muscular movements continue right through to your anus, where waste is eliminated from the body. In simplistic terms, it means moving food and liquids within the body from one place to another. These rhythmic, wave-like movements are created by peristaltic muscle contractions which are located within the walls of your
http://www.hon.ch/OESO/books/Vol_4_Prim_Motility/Articles/ART007.HTML http://digestivehealthguide.com/peristalsis-occurs-in-the-digestive-tract/ https://en.wikipedia.org/wiki/Peristalsis http://www.easynotecards.com/notecard_set/13800 https://en.wikipedia.org/wiki/Peristalsis https://en.wikipedia.org/wiki/Peristalsis http://www.austincc.edu/apreview/EmphasisItems/GImotility.html https://answers.yahoo.com/question/index?qid=20090406224222AAMlzC6 http://digestivehealthguide.com/peristalsis-occurs-in-the-digestive-tract/
what is responsible for peristaltic waves