Two cases of pharyngolaryngeal myoclonus were reported. The first case was a 59-year-old man who had complaints of hoarseness and lump sensation of the throat. On inspection involuntary rhythmic movements were recognized on the left side of the soft palate, the posterior wall of the pharynx and the arytenoid region. Electromyography of the left side of the soft palate and pharyngeal constrictor muscle showed rhythmic (150-180Hz) and monophasic or polyphasic high amplitude (500-1500 iti V)

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... ials. CT and MRI demonstrated multiple brain infarctions. The second case was a 22-year-old woman who encountered a traffic accident three years before. She was referred to our clinic with complaints of dizziness and hearing loss. Right oculomoter nerve palsy, equilibrium disorder and right palatopharyngeal myoclonus were recognized. Rhythmic (180-200Hz) and polyphasic high amplitude (more than 500 li V) potentials were obtained by electromyography. MRI showed contusion lesion of the right midbrain and old hemorrhagic lesion of the occipitallobe. Myoclonus in these cases was supposed to be caused by organic lesions of the Guillan-Mollare's trangle.