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Control of Feeding - Anatomy & Physiology (view source)
Revision as of 08:50, 17 July 2008
, 08:50, 17 July 2008no edit summary
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==The Vomit Reflex==
*Emesis is the process of vomiting
*Retching involves the abdominal and chest walls contracting
*Vomiting includes retching and the action of the diaphragm
*Diaphragm moves caudal to open the cardia
*Gastrointestinal tract have protective stimuli to recognise harmful products ingested. The mechanoreceptors and chemoreceptors respond using viscerent afferent pathways.
*Medulla co-ordinates process
*Chemoreceptive trigger zone in the 4th ventricle responds to blood and CSF
*Inputs also from inner ear and higher centres
*Emetic agents
**Histamine
**ACh
**Dopamine
**Catecholamines
**5-hydroxytryptamine
*Anti-emetic agents
(INCLUDE HERE)
==Species Differences==
===Equine===
*The horse cannot vomit
==Links==