What is happening in the body prior to vomiting?

[LightbulbSun]

What happens in your body prior to vomiting? By vomiting I mean after you eat something and you feel this overwhelming feeling of gas running from your stomach up into your thyroid. Is it just inflammation in the intestines that occurs that causes the food to be regurgitated or is there some acidy substance from the contaminated food that gets released into your stomach? I know this is probably a simple question, but I've always wondered what occurs inside your body prior to it happening.

 

[Ouabache]

You may want to peruse this reference, physiology of vomiting , for some light reading that addresses your question.