Eeg and Deep Tumors

Many studies report clinical and EEG findings in tumors of deep cerebral structures. It is contended in the main that clinical and radiological data are more useful for diagnosis and localization of such lesions than EEG findings. Workers largely agree on the character and localizing value of EEG in patients with tumors in or near the upper convexity of the brain but they report varied opinions in regard to the deep lesions. One could cull several dozen cases of deep intra-cerebral tumors out of mixed reports in which EEG findings have been described as not outstanding or as not definitely outside normal limits (Broglia and Postir 1956a, b; Daly et al. 1953; Van der Drift 1957; Jus et Jus 1947; Klass and Bickford 1958; Lairy-Bounes et DreyfusBrisac 1950; Lain 1950; Londofio 1957; Longo et al. 1950; Magnus and Van der Drift 1957; McDonald and Korb 1940; Paillas et al. 1948; Parat 1948; Silverman and Graft 1957; Schlesinger and Strauss 1947; T6nnis et al. 1953; Walter and Dovey 1944; Williams 1939). Investigators have found what they consider diffuse and ill-defined EEG abnormalities in these lesions (Bagchi and Bassett 1943; Daly etal . 1953; Longo et al. 1950; Schlesinger and Strauss 1947; Williams and Gibbs 1939). Homolateral alpha depression (Bucy and Case 1940; Case 1940), bilateral alpha bursts (Cobb 1944), fast waves (Cordeau 1959), 14-6/sec positive spikes (Stephenson 1951) have been mentioned.