Involuntary spasms of the diaphragm
What causes involuntary contractions or spasms of the
One of the most common asked question about the diaphragm concerns
the phenomenon of "hiccups" of which I think you are referring.
Simply, hiccups are involuntary contractions of the diaphragm
probably the result of eating a large meal or it has been
suspected to be a result of alcohol consumption. Some sources
claim that the abrupt closure of the voice box checking the inflow of
air will cause the onset of "hiccups" as well. Spasms may also
be the result of irritations of the nerves that control the
normally smooth and rhythmic contractions of this muscle.
Steven D Sample
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Update: June 2012