The human body 101: Why do we spasm, shiver or feel a lump in our throats?
You must have felt them? Those strange involuntary spasms over which you apparently have no control: A leg that kicks out as you drop off to sleep and startles you so that you are briefly wide-awake again? It most certainly involves the vagus nerve – the largest nerve in the autonomic nervous system which extends from the brain to the...
Source: asiaone.com