1 In-text citations in parenthesis, with only the author's last name and page number included (Smith, p. 4). 2  Double-spaced lines, but with no extra line breaks between each citation. 3  Footnotes (superscripted) also used to provide non-essential information.
Muscularis Extema is the layer of the digestive tract wall that is responsible for peristalsis.
1 Peristaltic contractions are always preceded by inhibition that, in the case of primary peristalsis, is called deglutitive inhibition. 2  Peristalsis in the striated muscle part of the esophagus is dependent on central mechanisms, involving sequential activation of vagal lower motor neurons in the vagal nucleus ambiguus.sophageal peristalsis consists of sequential contraction of the circular muscles of the muscularis propria, which is largely mediated by acetylcholine. This sequential contraction serves to occlude the esophageal lumen and push the bolus aborally.