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.
Peristalsis in the smooth muscle of the esophagus is dependent on both central and peripheral mechanisms. The central mechanism involves patterned activation of the preganglionic neurons in the dorsal motor nucleus of the vagus that project onto inhibitory and excitatory neurons in the esophageal myenteric plexus.