Clinical, electrophysiological investigations, evaluation of autonomic nervous system reactivity with estimation of Kerdo vegetative and stability indices were carried out in 58 patients with cochleovestibulopathy (CVP) and 10 normal controls. CVP patients with compensated disease had sympathicotonia, those with decompensated CVP exhibited parasympathicotonia. Functional loading tests and the stability index values revealed compensatory nature of sympathicotonia. Quantitative and qualitative characteristics of the compensation were related to age (under 40, over 41) and pathogenesis of the disease (central or peripheral). In CVP decompensation poor tolerance of mental work load was reported.