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1 M.R.C. Neuropsychiatric Research Unit, Carshalton, and West Park Hospital, Epsom, Surrey
2 Professor of Forensic Medicine, The London Hospital Medical College, London, E.1
3 Senior Lecturer, Department of Forensic Medicine, The London Hospital Medical College, London, E.1
Brains from the cadavers of 25 individuals reported to the coroner as having suffered from alcoholism were analysed for sodium, potassium, chloride, DNA and water, and the results were compared with those of a previous study of depressed and control subjects. The depressed individuals and 9 of the alcoholics died by suicide.
The alcoholic group differed from the other two groups in having significantly lower potassium and higher sodium values, and they also had lower chloride values than the control individuals. Water content and the amounts of DNA present were similar to control levels. Expected correlations of sodium and chloride on age were disrupted and there was a negative correlation of chloride on age.
Various explanations for these results were considered. The pattern of observed changes might have been due to:
(1) Differences in mode of death.
(2) Changes in the composition of the CSF/ ECS compartment.
(3) Loss of neurones, with and without replacement by other cells.
(4) Expansion of the cellular compartment and change in its ionic composition with normal concentrations of ions in the extracellular phase.
(5) Shrinkage of the cellular phase.
The first could not be excluded entirely; the second and fifth were the most improbable, but the third might have made a partial contribution to the findings. The fourth explanation was thought to be the one most likely to be correct. Only tentative explanations were justified and the limitations of this type of investigation are emphasized.
Submitted on May 6, 1969
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