The vague nerve is tested clinically by comparing the palatal arches on the two sides. On the paralysed side, there is no arching, and the uvula is pulled to the normal side
Paralysis of the vague nerve produces:
Nasal regurgitation of swallowed liquids
Nasal twang in voice
Hoarseness of voice
Flattening of the palatal arches
Cadaveric position of vocal cord
Dysphagia.