Also known as palatal myoclonus, it is a rare condition characterized by involuntary, rhythmic contractions of the soft palate or pharyngeal constrictor muscles. These contractions may be localized to one area or occur simultaneously in several locations, often presenting bilaterally and symmetrically.

bubble_chart Etiology

There are many pathogenic causes, mostly due to central brainstem lesions, such as brainstem vascular embolism, tumors, pontocerebellar diseases, syringobulbia, and diffuse cerebral arteriosclerosis. Some also believe that hysteria can be a disease cause, triggering the onset of palatal myoclonus. The mechanism of myoclonus remains unclear, with lesions often located in the brainstem, particularly the inferior olive region. The brainstem's lower reticular structure also plays a role in the occurrence of myoclonus.

bubble_chart Clinical Manifestations

It is more common in adults, with a slow onset. Myoclonus manifests as intermittent, involuntary, and rhythmic contractions, occurring dozens to over a hundred times per minute. Both the patient and others can hear clicking sounds. The contractions in the soft palate, throat, floor of the mouth, diaphragm, and other affected areas are bilateral, while those in the sternocleidomastoid and facial muscles are unilateral. Pharyngeal muscle contractions cause the soft palate to move up and down, leading to the opening and closing of the Eustachian tube, resulting in objective tinnitus. Myoclonus is not influenced by pulse or respiration and can be temporarily suppressed during swallowing or speech.

bubble_chart Diagnosis

Based on the patient's described symptoms and the observation of certain muscle clonus in the throat during examination, the diagnosis is not difficult. However, it should be differentiated from vascular pulsations and other neurological disorders.

Treat the disease cause. Acupuncture at points such as Lianquan, Tianding, the site for taking the carotid pulse, Taichong, and Hegu can be effective. Additionally, sedatives, suggestion therapy, mastoid electrotherapy, and hypnosis may be tried.