DIETARY STATUS IN SOCIAL DRINKERS

Is CT scan a valid indicator of brain atrophy in alcoholism?

The effect of ingesting varying quantities of alcohol upon the structure and function of the brain was studied using CT scan and psychometric testing. Nutritional status was also assessed. Alcoholics, heavy, moderate and light social drinkers were examined and their results compared with a normal control series. It was concluded that a daily consumption of more than 40 grams alcohol per day, "the safe level" results in brain damage. The latter may partially reverse with abstinence and having reversed maintain improvement, even though patients then resume drinking at the "safe level". The role of thiamin in brain function is still unclear.

CT demonstration of the early effects of alcohol on the brain

CT evidence of brain damage has been sought in subjects consuming alcohol between 10 g/day to over 200 g/day. Dietary contributing factors have been evaluated. The level of atrophy (shrinkage) has been correlated with intellectual performance. To establish a relationship between alcohol intake and brain structure and function, re-examination of subjects over a 6- to 12-month period of abstinence has been undertaken to examine any reversibility features. A record of liver function showed that brain damage always precedes liver damage. Subjects were re-examined a second time, who had initially abstained for six months and then had returned either to their original level of consumption or to one that was somewhat reduced. A regression in initial improvement was considered evidence of reversible brain damage that had originally been related to alcohol. The threshold consumption for CT damage was 40 g/day, but the level of CT atrophy at which cognitive dysfunction appeared has still to be established.