What makes us Hiccup?

@charlina (158)
Philippines
February 6, 2007 6:42am CST
i 've always wandered.. but never known!;-)
1 response
Seattle2007
@Seattle2007 (344)
• United States
6 Feb 07
Hi there...hiccups are caused by an involuntary spasm of the diaphragm. The sudden rush of air into the lungs causes the glottis to close creating the "hic" noise.
Seattle2007
@Seattle2007 (344)
• United States
6 Feb 07
forgive me...a glottis is space between the vocal cords. Diaphragm is the sheet of muscle extending across the lower part of the ribcage. My medical background sometimes makes me forget that not everyone understands all the medical terminology