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In medicine, laryngospasm is an uncontrolled/involuntary muscular contraction (spasm) of the vocal folds. The condition typically lasts less than 60 seconds, but in some cases can last 20-30 minutes and causes a partial blocking of breathing in, while breathing out remains easier.
The voice box is the narrowest part of the windpipe so it has the lowest pressure during rapid breathing. And, in fact, laryngospasm might not be a spasm at all. It may be an inhibition or lack of ability for the opening muscles of the voice box to operate momentarily. believe laryngospasm is a normal response to prevent drowning or keeping fluid out of the lungs. If you truly were drowning, this is a great reflux to have functioning. That clamping shut of the vocal cords may save your lungs from a bath or long enough for you to get back to the surface.