       Document 0270
 DOCN  M9640270
 TI    Electrophysiological characteristics of lesions in facial palsies of
       different etiologies. A study using electrical and magnetic stimulation
       techniques.
 DT    9604
 AU    Rosler KM; Magistris MR; Glocker FX; Kohler A; Deuschl G; Hess CW;
       Department of Neurology, University of Berne, Inselspital,; Switzerland.
 SO    Electroencephalogr Clin Neurophysiol. 1995 Dec;97(6):355-68. Unique
       Identifier : AIDSLINE MED/96136130
 AB    Using magnetic stimulation techniques in addition to conventional
       electrical stimulation, the entire facial motor pathway can be assessed
       electrophysiologically. To study the diagnostic yield of these
       examinations, 174 patients with facial palsies of a variety of
       etiologies were examined (85 Bell's palsies, 24 Guillain-Barre syndrome
       (GBS), 19 Lyme borreliosis, 17 zoster oticus, 12 meningeal affections,
       10 brain-stem disorders and 7 HIV-related facial palsies). The facial
       nerve was stimulated electrically at the stylomastoid fossa and
       magnetically within its canalicular portion. Additionally, the
       face-associated contralateral motor cortex was stimulated magnetically.
       Recordings were from the nasalis or mentalis muscle, or both, using
       surface electrodes. Bell's palsy patients showed typically a unilateral
       local hypoexcitability of the facial nerve to canalicular stimulation.
       In GBS, bilateral latency prolongations were frequent, as expected for a
       myelinic disorder. In contrast, in zoster, predominant axonotmesis was
       unilateral, and in HIV infection sometimes bilateral. The method was
       very sensitive to detect subclinical dysfunctions in meningo-radiculitis
       and malignant meningeal diseases, either prior to the onset of palsy, or
       on the contralateral (clinically unaffected) side. It also distinguished
       reliably between central and peripheral facial motor pathway lesions. In
       our experience, these inexpensive and non-invasive electrophysiological
       techniques contribute substantially to the differential diagnosis of
       facial palsies.
 DE    Adult  Aged  Analysis of Variance  *Electric Stimulation
       Electromyography  Facial Paralysis/ETIOLOGY/*PHYSIOPATHOLOGY  Female
       Human  *Magnetics  Male  Middle Age  Neural Conduction/PHYSIOLOGY
       JOURNAL ARTICLE

       SOURCE: National Library of Medicine.  NOTICE: This material may be
       protected by Copyright Law (Title 17, U.S.Code).

