Hiccup

Involuntary contraction of the diaphragm

A hiccup (scientific name singultus, from Latin for 'sob, hiccup'; also spelled hiccough) is an involuntary contraction (myoclonic jerk) of the diaphragm that may repeat several times per minute. The hiccup is an involuntary action involving a reflex arc. Once triggered, the reflex causes a contraction of the diaphragm followed by the closure of the glottis, the space between the vocal cords, in about 35 milliseconds, which results in the "hic" sound.

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