THE REVERSIBILITY OF ALCOHOLIC BRAIN-DAMAGE IS NOT DUE TO REHYDRATION- A CT STUDY

Alcoholic brain damage is reversible when the patients are continually abstinent. An increase of brain water content was the putative explan ation for this phenomenon. We tested the rehydration hypothesis using CT density measurements in 29 alcohol-dependent male inpatients. Durin g a 5-week period of controlled abstinence, CT density measures did no t decrease in any of the investigated regions of the brain as one woul d expect with an increase in brain water. Although the volumetry of th e ventricular system and the subarchnoidal spaces revealed a significa nt reduction of CSF volume, we found a slight increase in CT density m easures. Thus, our results are in contradiction to the rehydration hyp othesis. Under discussion is whether neuronal plasticity might be the explanation of the reversibility of alcoholic brain damage in abstinen t patients.