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  • Title: Auditory brainstem and middle-latency responses in Bell's palsy.
    Author: Maurizi M, Ottaviani F, Almadori G, Falchi M, Paludetti G.
    Journal: Audiology; 1987; 26(2):111-6. PubMed ID: 3606470.
    Abstract:
    Patients with acute peripheral facial palsy (Bell's palsy) were examined by auditory brainstem response (ABR) and middle-latency response (MLR) for signs of brainstem involvement. ABR data on 30 patients indicated that wave V latencies were abnormal by greater than 3 SD in only 2 patients, 1 of whom showed abnormality contralateral to the affected side. When the criterion for abnormality was reduced to 2 SD, wave V abnormality was found in only 3 of the 30 patients. All 14 patients tested by MLR showed normal responses. These findings suggest that on the basis of evoked potential measures, brainstem involvement may not be pathognomonic of Bell's palsy.
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