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  • Title: [The time characteristics of the brain stem and cortical auditory evoked potentials in patients with chronic functional voice disorders].
    Author: Shydlovs'ka TA.
    Journal: Fiziol Zh (1994); 1998; 44(1-2):41-8. PubMed ID: 9619407.
    Abstract:
    The study of time characteristics of short-latency acoustic evoked potentials (SLAEP) and long-latency acoustic evoked potentials (LLAEP) in relation to electroencephalography (EEG) data was performed in individuals with normal voice and hearing, as well as in patients with chronic functional voice impairments (CFVI). Significant abnormalities in SLAEP and LLAEP parameters, especially in patients with CFVI with low amplitude alpha-rhythm, were revealed. The conducted study of SLAEP and LLAEP with respect to EEG data in patients with CFVI with low amplitude alpha-rhythm provide objective evidence for beliefs of many clinicians about a prominent role of neurogenic factors in the development of functional voice impairments as well as the existence of correlation between hearing and voice-producing systems. Delay in the sound information processing at the level of the brainstem was found in patients with CFVI, especially in those having low amplitude alpha-rhythm, which was being observed in prolongation of the latency periods of peaks III, IV and V of the SLAEP waves along with widening of the interpeak intervals I-III and I-V. Such the patients are characterized by severe course of their disease and frequent relapses. The data received could be expediently used for treatment and rehabilitation of patients with CFVI and solving matters of labor expertise.
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