Die okuläre Neuromyotonie – klinisches Bild und Gedanken zur Pathogenese
| Autor: | D. Salchow, T. K. Wermund |
|---|---|
| Rok vydání: | 2009 |
| Předmět: |
Diplopia
Pathology medicine.medical_specialty Neuromyotonia business.industry Ephaptic coupling medicine.medical_treatment medicine.disease Extraocular muscles eye diseases Pathophysiology Radiation therapy Ophthalmology Electrophysiology medicine.anatomical_structure Neuroimaging medicine medicine.symptom business |
| Zdroj: | Klinische Monatsblätter für Augenheilkunde. 226:881-885 |
| ISSN: | 1439-3999 0023-2165 |
| DOI: | 10.1055/s-0028-1109729 |
| Popis: | Ocular neuromyotonia (ONM) is a rare neurogenic disorder of ocular motility. The affected patients complain of recurrent transient diplopia secondary to a sudden, painless deviation of one eye. This deviation occurs in the direction of action of an extraocular muscle, which is being stimulated at high frequency. ONM is usually seen after radiation therapy, but may also be caused by compression of the affected cranial nerve. The pathophysiology of ONM is incompletely understood, potential mechanisms include 1) ephaptic transmission along the affected nerve, 2) disturbances of potassium channels in the neuronal cell membrane, and 3) central neural re-organisation. The diagnosis of ONM is made based on clinical findings and can be supported by electrophysiological characteristics. Neuroimaging with attention to the affected cranial nerve should be obtained in order to exclude a compressive cause. Therapy of ONM with carbamazepine is usually effective. |
| Databáze: | OpenAIRE |
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