7 Surprising Hiccups Facts
What are hiccups?
Hiccups are bursts of inspiratory (breathing in) activity. The muscles we use when we take in a breath are the intercostal muscles situated between the ribs, and the diaphragm — a sheet of muscle below the lungs. A hiccup is an involuntary contraction of the diaphragm, which is followed by the sudden closure of your vocal cords – this produces the characteristic hiccup sound.