Lumbar Air Encephalography in Chronic Schizophrenia: A Controlled Experiment

Abstract

The lumbar air encephalogram (L.A.E.G.) was introduced by Dandy in 1919, and in 1929 the first report of its use in schizophrenia was published by Jacobi and Winkler. Since then numerous papers have appeared, most of which have claimed to demonstrate cerebral atrophy in chronic schizophrenic patients. All these studies have suffered from the fact that no adequate series of normal controls has yet been collected. Most of the authors concerned made no attempt to use controls, nor did they consider the possibility of observer error or of the bias which may exist when the reporting radiologist knows the diagnosis and is looking for abnormalities.