THE ENCEPHALOGRAM AND HYPERVENTILATION

The Normal Encephalogram

The Electro-encephalogram in Acute Head Injuries.

IN a series of papers published ten years ago Berger reported abnormally slow waves in the electro-encephalogram (e.e.g.) of patients with diverse intracranial abnormalities. This work has already been adequately reviewed (Jasper, 1937, Walter, 1938). Since then these abnormally slow changes in electrical potential have been investigated in relation to tumours, abscesses, and other local lesion...

The isotope encephalogram in brain tumor diagnosis.

Scanning of the radioactive tracers in the calvarium represents a major advance of diagnostic techniques in the evaluation of intracranial disease. The pioneering work by Moore (18) at Mayo Clinic in 1948 utilized 1311 labeled Di-lodo-fluorescein as the tracer detected by a Geiger-Muller tube. This now primitive system demonstrated a higher concentration of the isotope tracer in the brain tumor...

The Electro-encephalogram in Blind Children.

THERE have been surprisingly few studies of the electro-encephalogram (EEG) in blind persons, and the first report appears to be that of Adrian and Matthews (1934) on the absence of alpha rhythm in totally blind subjects. Further reports on the alpha rhythm were made by Loomis, Harvey, and Hobart (1936), Lemere (1942), Callahan and Redlich (1946), Redlich, Callahan, and Mendelson (1946), Drever...

Effects of Hyperventilation Can hyperventilation cause syncope?