Effects of lifetime ethanol consumption on postural control: a computerized dynamic posturography study
Ahmad, S.; Rohrbaugh, J.W.; Anokhin, A.P.; Sirevaag, E.J.; Goebel, J.A.
Journal of Vestibular Research Equilibrium and Orientation 12(1): 53-64
2002
ISSN/ISBN: 0957-4271 PMID: 12515892 Document Number: 541423
The relationship between lifetime alcohol consumption and postural control was investigated in 35 subjects with no clinically-detectable neurologic abnormalities, using computerized dynamic posturography (CDP) procedures. The estimated total number of lifetime alcoholic drinks was positively correlated with anteroposterior sway spectral power within the 2-4 Hz and 4-6 Hz frequency bands, in three Sensory Organization Test (SOT) conditions: eyes closed with stable support surface (SOT 2), eyes open with sway-referenced support (SOT 4), and eyes closed with sway-referenced support (SOT 5). All correlations remained significant after controlling for subject age, and were increased after excluding nine drug-abusing subjects. In contrast to the strong findings for frequency-based measures, no correlation was observed using conventional amplitude-based sway measures. These results suggest that 1) alcohol consumption compromises postural control in an exposure-dependent manner, and 2) sway frequency analysis reveals pathological processes not manifested in conventional CDP measures of sway amplitude.