peristaltic reflex

peristaltic reflex
when a portion of the intestine is irritated or distended, the area just proximal contracts (see ascending excitatory r.) and the area just distal relaxes (see descending inhibitory r.).

Medical dictionary. 2011.

Look at other dictionaries:

  • peristaltic rush — a powerful wave of contractile activity that travels long distances down the small intestine; it is caused by intense irritation or unusual distention. Called also peristaltic reflex …   Medical dictionary

  • Reflex — A reaction that is involuntary. The corneal reflex is the blink that occurs with irritation of the eye. The nasal reflex is a sneeze. * * * 1. An involuntary reaction in response to a stimulus applied to the periphery and transmitted to the… …   Medical dictionary

  • ascending excitatory reflex — the component of the peristaltic reflex in which muscles proximal to a bolus contract and actively push the bolus along …   Medical dictionary

  • descending inhibitory reflex — the component of the peristaltic reflex in which muscles distal to a bolus relax so that the bolus can move along …   Medical dictionary

  • myenteric reflex — n a reflex that is responsible for the wave of peristalsis moving along the intestine and that involves contraction of the digestive tube above and relaxation below the place where it is stimulated by an accumulated mass of food * * * a reflex… …   Medical dictionary

  • gastrocolic reflex — n the occurrence of peristalsis following the entrance of food into the empty stomach * * * a wave of peristalsis produced in the colon by introducing food into a fasting stomach. * * * an increase in intestinal and colonic peristaltic activity… …   Medical dictionary

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  • digestive system, human — Introduction  the system used in the human body for the process of digestion. The human digestive system consists primarily of the digestive tract (alimentary canal), or the series of structures and organs through which food and liquids pass… …   Universalium

  • swallowing — or deglutition Act that moves food from the mouth to the stomach. The tongue pushes liquid or chewed food mixed with saliva into the pharynx. Reflex takes over as the soft palate rises to close off the nasal cavity; the larynx rises and the… …   Universalium

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